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[01:27] <arko> hah fun
[01:27] <arko> https://web2py.excitedbit.com/ocean_current_predictor/
[01:27] <arko> click on the map
[01:45] <TylerK> I'm running a Raspberry Pi connected to an NTX2. Right now the Txd pin of the pi is connected to a computer as well to test the serial data is being sent to the NTX2 correctly and it is. I have my SDR# program and RTTY settings on digi set to the following settings on my computer that can be seen in this photo: http://i.imgur.com/lCeR1yO.png can anyone help me out with what I
[01:45] <TylerK> I'm doing wrong here?
[01:47] <Darkside> you're not tuned correctly
[01:47] <Darkside> see that peak in the top display? you want that peak to be within the shaded area
[01:48] <TylerK> ok let me change it real quick
[01:50] <Darkside> how are you connecting the rpi to the NTX2? are you using the resistor methods as documented on the UKAHS wiki?
[01:50] <TylerK> yes
[01:51] <Darkside> good
[01:51] <Darkside> and running the rpi's UART at 300 baud?
[01:51] <TylerK> so once I do that how do I change the waterfall settings in digi?
[01:51] <TylerK> yes
[01:52] <Darkside> sounding good so far
[01:54] <Darkside> you don't need to change the waterfall settings in fldigi
[01:54] <Darkside> have you retuned SDR# so that the peak is within teh shaded area?
[01:55] <TylerK> yeah I changed it so it's within the first and second spike
[01:55] <Darkside> you on't want one spike
[01:55] <Darkside> the big one
[01:56] <Darkside> can you post a screenshot now?
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[01:56] <TylerK> yeah one second
[01:58] <TylerK> http://imgur.com/xpZxpo9
[02:00] <Darkside> closer
[02:00] <TylerK> do I still need to narrow the filter?
[02:01] <Darkside> no
[02:01] <Darkside> you are off tune though
[02:01] <Darkside> by a few KHz
[02:01] <Darkside> its a bit hard to tune finely in SDR#
[02:02] <Darkside> you only need a SSB bandwidth of 3KHZ, thats all fldigi will handle anyway
[02:02] <TylerK> is there another sdr that you would recommend? I'm using a windows os
[02:02] <Darkside> this SDR will be fine
[02:02] <Darkside> you just need to tune it properly
[02:04] <TylerK> sorry I'm new to using SDR's but how to I tune it better?
[02:05] <Darkside> i think you can
[02:07] <TylerK> do you have any suggestions how to?
[02:09] <Darkside> use the VFO at the top
[02:09] <Darkside> click the numbers to adjust finely
[02:09] <Darkside> the second 4
[02:09] <Darkside> 434.644
[02:10] <Darkside> if you change that to 434.645 it shoudl mvoe the data a bit further into the fldigi passband
[02:11] <Darkside> ok I need to head off
[02:11] <Darkside> back later
[02:12] <TylerK> ok thank you!
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[02:30] <dshaw_> has anyone used pyserial on their high altitude balloon and may answer a quick question :D?
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[03:10] <arko> https://web2py.excitedbit.com/ocean_current_predictor/
[03:10] <arko> wiggle wiggle wiggle wiggle
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[03:15] Nick change: Mission-Critical -> MissionCritical
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[03:33] <dshaw_> hey all. wanted to see if others had sent SSDV data as a string with pyserial and had success >.<?
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[04:06] <Darkside> nfi
[04:06] <Darkside> maybe don't use a pi
[04:06] <Darkside> >_>
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[04:20] <heathkid> can I ask a really stupid question?
[04:20] <Darkside> just ask
[04:20] <heathkid> how much helium does it take to fill a Kaymont 1500?
[04:20] <heathkid> and/or hydrogen...
[04:21] <arko> http://habhub.org/calc/
[04:21] <arko> that should help a great deal
[04:21] <Darkside> about 3m^3
[04:21] <Darkside> but yeah
[04:21] <arko> under advanced you can change the gas
[04:23] <heathkid> does that mean like a party size He tank or ???
[04:23] <heathkid> I have no clue how much 3m^3 actually is...
[04:24] <heathkid> or am I looking at getting a "real" tank?
[04:24] <arko> its a fairly large tank
[04:25] <arko> you're going to need a trunk or well fit car
[04:25] <heathkid> have a link to a photo of a standard tank used to fill a 1500?
[04:25] <arko> well
[04:25] <arko> its not a good way going about the problem
[04:25] <arko> you should find out how many cu-ft or cu-m the tank is
[04:26] <arko> and using that calculator figure out how much you need to fill the balloon
[04:26] <arko> call local party stores or gas rental places
[04:26] <heathkid> I don't want to rent
[04:26] <arko> give them the cu-ft/cu-m and they will provide
[04:26] <heathkid> okay
[04:26] <arko> you want to buy the tank?
[04:26] <heathkid> yep
[04:27] <arko> wow, thats pricy but ok
[04:27] <heathkid> planning a lot of launches soon
[04:27] <arko> kk
[04:27] <arko> well, call up
[04:27] <heathkid> will do
[04:27] <arko> are you eu or us?
[04:27] <heathkid> us
[04:27] <arko> oh cool
[04:27] <heathkid> you?
[04:27] <arko> same
[04:27] <arko> i usually go to airgas
[04:27] <heathkid> Indiana
[04:27] <arko> nice, California
[04:28] <heathkid> initially I'm looking at very fast ascent to burst so I don't have to drive so far...
[04:28] <arko> cool
[04:28] <arko> why a 1500g btw?
[04:28] <arko> thats a bit big
[04:29] <heathkid> working out a solution to use a parafoil (para-sail).... have two... to return to launch site
[04:29] <heathkid> oversize balloon for fast ascent
[04:29] <heathkid> probably about a 2 lb. payload
[04:30] <heathkid> but lots of strings that get tangled trying to even take them out of the packaging! :)
[04:30] <heathkid> probably won't ever work anyway...
[04:31] <heathkid> but first is just a launch to test the electronics package
[04:32] <heathkid> I'll track it and most probably will never recover it...
[04:32] <heathkid> APRS
[04:32] <heathkid> would like to do APRS, RTTY, and CW all at the same time (we're working on it)
[04:32] <heathkid> tracking and beacon
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[04:33] <arko> oh neat
[04:34] <heathkid> but I've never done a HAB launch yet so I'm just trying to learn enough not to be stupid
[04:35] <arko> gotcha
[04:35] <heathkid> so a Kaymont 1500 takes a lot of gas?
[04:35] <arko> yeah
[04:35] <arko> a lot
[04:35] <heathkid> dang
[04:35] <arko> for a 2lb payload, you would end up wasting a lot
[04:36] <heathkid> maybe I'll do a pico for starters... :)
[04:36] <arko> yea!
[04:36] <heathkid> a 3 ft. party balloon
[04:36] <arko> i was about to say
[04:36] <arko> keep it simple for the first
[04:36] <heathkid> yep
[04:36] <arko> i spent wayyy to much money on my first one
[04:37] <arko> proof of concept then scale up
[04:37] <heathkid> I take it a Kaymont 1500 is a serious HAB launch then?
[04:37] <arko> whats your target altitude?
[04:37] <arko> well, it depends what you want to do
[04:38] <arko> i recommend messing with that calculator
[04:38] <arko> input 907g for mass since you are 2lbs
[04:38] <heathkid> I want 100k ft. at least
[04:38] <arko> ok
[04:38] <arko> 31000m is good
[04:38] <heathkid> can't do that with a pico
[04:38] <arko> well, pico will weigh much less
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[04:39] <heathkid> heh... the two AA batteries weigh more than the rest of the payload!
[04:39] <arko> 100g with a kaymont 800 and target alt of 31000m should rise at about 6.35m/s
[04:39] <arko> pretty fast
[04:39] <arko> heh ya
[04:39] <arko> http://habhub.org/calc/
[04:39] <arko> mess with that, you'll learn quickly what you need
[04:40] <heathkid> 6.35m/s? wow!
[04:40] <heathkid> that's pretty fast
[04:40] <arko> yeah
[04:40] <heathkid> guess I need some smaller balloons....
[04:40] <arko> also, for your first hab, i recommend renting a tank
[04:40] <heathkid> the 800 sounds about right
[04:40] <arko> make sure you get the cu-ft right
[04:40] <heathkid> ok
[04:40] <arko> buying a tank will get expensive
[04:41] <arko> heck, you may even know people with a tank
[04:41] <arko> ask around
[04:41] <arko> school
[04:41] <arko> etc
[04:41] <heathkid> I "might" be able to get one
[04:42] <heathkid> I've got every tank available at work... maybe one might get disposed of...
[04:43] <heathkid> most are empty anyway
[04:43] <heathkid> no He at work though
[04:44] <arko> ah
[04:44] <arko> yeah, you can go to airgas and fill up
[04:44] <heathkid> but I do get the fun job of filling all the dewers with LN2
[04:44] <heathkid> :)
[04:44] <heathkid> darn SEMs
[04:44] <arko> hah nice
[04:45] <heathkid> heh... learned real quick not to lean against the table while filling....
[04:45] <heathkid> pants + LN2 = stuck to the darn table!!!
[04:45] <heathkid> besides... it's COLD! :)
[04:45] <heathkid> lol
[04:46] <arko> yeah, some crazy stuff
[04:46] <arko> safety first
[04:46] <arko> heh
[04:46] <heathkid> I'm scared of it but love it
[04:47] Nick change: KT5TK1 -> KT5TK
[04:49] <heathkid> the only part I hate is at first when you open the valve it's not liquid but fills the room with a cloud of gas so you can't really see what you're doing...
[04:50] <heathkid> well ventilated of course (kinda)... :)
[04:50] <heathkid> first the Hitachi.... then the Jeol...
[04:51] <heathkid> and I hate it when the tank starts venting when you're not expecting it!
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[05:27] <dshaw_> having some trouble receiving SSDV data, but am getting telemtry data correct (minus an always incorrect checksum). any advice??
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[06:33] <eroomde> ol is so full of shit
[06:33] <eroomde> 'i don't understand any of the maths, but here's what i think anyway'
[06:34] <arko> ol?
[06:34] <eroomde> ilver de peyer phd
[06:34] <Upu> lol
[06:34] <fsphil> oh he mailed the list
[06:34] <Upu> I did say
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[06:35] <arko> uggg, i hate javascript some days
[06:36] <fsphil> alert("know what you mean")
[06:36] <arko> ugg
[06:36] <arko> i forgot about it's float issues
[06:36] <arko> doing toFixed on some decimals doesn't always work
[06:36] <fsphil> it's annoying because it's easy to do cool stuff in javascript. so one moment it's amazing, the next it's the worst thing in the world
[06:37] <arko> yep!
[06:39] <arko> man, the function works great like 80% of the time
[06:39] <arko> other times it throws 118.3129999999995
[06:39] <arko> even though im doing toFixed(6)
[06:39] <arko> -_-
[06:40] <arko> stupid floats
[06:53] <fsphil> if it's just for displaying, is there a version of printf?
[06:54] <arko> https://web2py.excitedbit.com/ocean_current_predictor/
[06:54] <arko> UGGGGG
[06:54] <arko> F U JAVASCRIPT
[06:54] <arko> because im requesting elevation data
[06:55] <arko> if the url to request is too long, it spits out an error
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[06:55] <arko> if it's too short, the precision of the path is bad
[06:55] <arko> if i have too many steps, google spits back an error for too many datapoints
[06:56] <arko> if i try to sample each point at a time, rather than sending a group of points (the request for elevation data), it ends up taking forever
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[07:18] Nick change: MichaelC1 -> MichaelC
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[07:21] <arko> ok im done ranting
[07:21] <M0TVU> Morning
[07:22] <arko> good morning
[07:22] <M0TVU> Any launches today?
[07:22] <M0TVU> haven't looked around as yet
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[07:22] <arko> i dont think so
[07:23] <M0TVU> infact - i could be classsed as still partly asleep
[07:23] <M0TVU> Testing it is then
[07:23] <arko> im getting loopy looking at this code
[07:23] <M0TVU> code?
[07:23] <daveake> Yeah none today several tomorrow
[07:23] <arko> its making less sense, so im comitting and calling it a night before i go crazy
[07:24] <arko> code
[07:24] <M0TVU> code is good - code is what keeps us alive and in my case pays the mortgage
[07:24] <arko> \o/ woo
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[07:25] <M0TVU> but youre probably writing in Satans language AKA C
[07:25] <M0TVU> lol
[07:25] <arko> nah
[07:25] <arko> also
[07:25] <arko> C is great language
[07:25] <arko> https://web2py.excitedbit.com/ocean_current_predictor/
[07:25] <arko> working on that
[07:25] <M0TVU> I never got in to C back in the days of the 68000
[07:26] <arko> BC
[07:26] <arko> get it right
[07:26] <arko> :P
[07:26] <arko> yeah, this is python/javascript
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[07:27] <M0TVU> I played with python for a while and javascript when i have to - JavaScript the cause of killing coders all over the world -lol
[07:28] <arko> yes
[07:28] <M0TVU> Actually it's not JS fault I lame Microsaft.
[07:28] <M0TVU> blame
[07:29] <M0TVU> Just because they can be blamed for everything
[07:29] <arko> too easy
[07:29] <Upu> so year 2010
[07:29] <arko> after writing JS i feel like i need a night of heavy drinking
[07:29] <Upu> we don't blame Microsoft anymore
[07:29] <arko> it's Apple's fault now
[07:29] <Upu> Google is where the cool kids are at
[07:29] <arko> oh yeah google
[07:30] <M0TVU> I went to their offices a while ago to purchase a gooogle box. Very Impressive
[07:31] <M0TVU> Microsaft reading is impressive too - along with orrible just across the road
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[07:32] <costyn> morning
[07:32] <arko> morning costyn
[07:32] <M0TVU> Morning
[07:32] <costyn> arko: this weekend another attempt to find the payload right?
[07:33] <arko> this weekend is the meeting with the search and rescue team, next weekend is the attempt
[07:33] <costyn> ah
[07:33] <arko> we have a good chance too :)
[07:33] <costyn> cool
[07:35] <M0TVU> back later switching to shack PC
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[07:46] <fsphil> often shack seems to be a fancy word for shed
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[08:21] <costyn> why does one need a shack/shed for radio stuff?
[08:22] <costyn> why not just a (part of) a room in a house?
[08:22] <fsphil> that's what I have
[08:23] <costyn> or is it that in some cases people have acquired so much radio equipment the missus no longer puts up with it
[08:23] <costyn> off to the garden with you
[08:24] <costyn> fsphil: and I don't consider 'shack' a fancier word than 'shed' :)
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[08:24] <fsphil> hehe yea
[08:24] <fsphil> "club shed" just doesn't sound good though
[08:25] <x-f> sounds of digital modes and white noise can become annoying :)
[08:30] <Brace> costyn: that's pretty much it really
[08:30] <Brace> although when I did ham stuff, I knew plenty of the older members who just took over one of their kids old bedrooms
[08:31] <Brace> really nice tidy houses and then this one bombshell of a room full of radios etc
[08:31] <costyn> haha
[08:31] <costyn> I have no such luxury unfortunately
[08:34] <Brace> I'm building/planning a workshop at the moment (mainly for woodworking) but it'll have a section for electrical stuff
[08:34] Nick change: MichaelC -> MichaelC|Away
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[08:52] <HixWork> Darkside, http://hackaday.com/2013/04/04/melting-metal-with-a-diy-foundry-furnace/
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[09:49] <HixWork> This looks interesting, for creation of new eagle lib parts https://github.com/andete/madparts/wiki
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[09:52] <griffonbot> Received email: gonzo_ "Re: [UKHAS] Re: Launch announcement - WUSAT - Sat 6th - near Welshpool"
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[10:05] <eroomde> gonzo_: thank you for patiently explaining that
[10:06] <eroomde> costyn: I think the reason it's in a separate building is because otherwise the instances of domestic violence and murder in retirement would rise sharply
[10:07] <costyn> eroomde: fair enough :)
[10:07] <costyn> gonzo_: yea that was informative
[10:07] <griffonbot> Received email: Adam Cudworth "[UKHAS] Re: HABHUB iOS App"
[10:20] <gonzo_> wives tend not to go into sheds, so it eases the situation
[10:20] <M0TVU> Hi all. Just testing the transmitter and wondered if there's anyone around the West Mid's that might be able to hear it?
[10:20] <Darkside> hmm so whats the android app called?
[10:21] <gonzo_> remember one old lad had a huge spider in the window of the shed, which I was not keen on. But he explained it had been dead for years. But it kept the missus out
[10:21] <Darkside> nvm got it
[10:22] <x-f> spiderbro
[10:23] <Brace> lol
[10:23] <M0TVU> Should have said 434.650
[10:27] <Darkside> uuurrgh
[10:27] <Darkside> the android ukhas app requires OSM
[10:27] <Darkside> and OSM is crap around here
[10:34] <M0TVU> .
[10:46] <lz1dev> Darkside: whats OSM?
[10:47] <Darkside> open street maps
[10:47] <griffonbot> Received email: Philip Crump "[UKHAS] 868MHz RTTY Receivers Poll"
[10:49] <lz1dev> oh, osm is pretty nice
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[10:53] <HixWork> THought this may be of interest to a few of you http://hackaday.com/2013/03/22/writing-new-firmware-for-a-handheld-radio/
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[10:57] <Maxell> "< Darkside> and OSM is crap around here" fix it! :P
[10:57] <Darkside> Maxell: sure, if someone would pay me
[10:57] <Darkside> mattbrejza: make it have google maps as an option, please
[10:58] <costyn> Darkside: cuddykid is the author
[10:58] <Darkside> oh
[10:58] <costyn> oh wait
[10:58] <Darkside> cuddykid: GOOGLE MAPS
[10:58] <costyn> no that's the IOS app
[10:58] <costyn> sorry
[10:58] <costyn> Darkside: sorry for the confusion
[10:58] <Darkside> ah
[10:58] <costyn> Darkside: I just installed the IOS app myself
[10:59] <Darkside> i dont have any iOS devices
[10:59] <cuddykid> yeah, I'm iOS
[10:59] <cuddykid> I'm thinking of making google maps an option - though apple maps has got significantly better recently
[10:59] <jonsowman> fsphil: source for strand news?
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[11:09] <G0DJA> M0TVU You might be a bit far away from here for 10mW i think
[11:12] <willdude123> Hi.
[11:17] <gonzo_> especially if you were to use 24kbaud
[11:17] <Darkside> lol
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[11:20] <costyn> cuddykid: weird, I'm seeing an old flight (think it was jcoxon's), off the coast of norway)
[11:20] <costyn> cuddykid: it doesn't have a name, just a long string of numbers
[11:20] <cuddykid> ah yes, saw that yesterday, it's pulling info off habitat so probably an issue there
[11:20] <cuddykid> I'll have a look
[11:20] <costyn> ah ok... Also ASTRA1 is on there too
[11:21] <willdude123> Still really stuck on NTX2-Arduino
[11:22] <craag> willdude123: How far have you got?
[11:22] <willdude123> Nowhere.
[11:23] <willdude123> I built it earlier, and managed to turn it on and off.
[11:23] <willdude123> But that was messed up.
[11:24] <willdude123> Where is the red wire going and from where on http://ukhas.org.uk/_detail/guides:linkingntx2-3.jpg?id=guides%3Alinkingarduinotontx2 ?
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[11:27] <cuddykid> costyn: tracked it down - it's strings from some iridium modem
[11:27] <cuddykid> http://pastebin.com/ZrzAFuKg
[11:27] <cuddykid> ^ it's parsing that, which is being given by habitat
[11:28] <willdude123> Oh it's 5v ground and pin 13.
[11:30] <costyn> willdude123: its better to try to follow the circuit diagram. might be a little longer figuring it out, but you'll understand better what you've made
[11:30] <costyn> willdude123: instead of just copying the picutres
[11:31] <costyn> willdude123: if you ask me the circuit diagram looks simpler than the pictures :)
[11:31] <willdude123> Okay. I'll try.
[11:32] <willdude123> It looks really complicated.
[11:32] <costyn> willdude123: you can try comparing the circuit you've made to the diagram. try to identify the various wires and bits
[11:33] <costyn> cuddykid: ah ok... interesting
[11:33] <costyn> cuddykid: so why does spacenearus tracker not have that listed?
[11:34] <cuddykid> it pulls data slightly differently and also they manually delete quite a lot of stuff off the tracker
[11:34] <cuddykid> the app just gets the last 50 or so (I think, can't remember exact number) hours of data uploaded on startup
[11:34] <costyn> ok
[11:35] <willdude123> Where does vcc go?
[11:35] <willdude123> And why are there 2?
[11:35] <costyn> willdude123: vcc = 5v
[11:35] <costyn> willdude123: both should be connected to 5v
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[11:36] <costyn> willdude123: just see vcc as + and gnd as -
[11:36] <willdude123> Okay.
[11:37] <willdude123> How am I supposed to link VCC to EN?
[11:37] <costyn> willdude123: with a jumper wire
[11:38] <willdude123> Oh yeah.
[11:38] <costyn> willdude123: in this picture, http://ukhas.org.uk/_detail/guides:linkingntx2-2.jpg?id=guides%3Alinkingarduinotontx2 it's the 2 yellow wires on the right
[11:38] <costyn> willdude123: both connected to the + rail on the breadboard
[11:39] <costyn> willdude123: do you understand how the holes in the breadboards are connected?
[11:40] <costyn> willdude123: http://ecee.colorado.edu/~mathys/ecen2250/myDAQ01/breadboard_90.png
[11:40] <willdude123> Yes,rails along the sides are vertically connected, and the rows are horizontally connected.
[11:40] <costyn> ea
[11:40] <costyn> yea
[11:41] <willdude123> I think I've got it right/
[11:41] <willdude123> I'm not sure.
[11:41] <costyn> upload a pic if you're not sure
[11:41] <willdude123> I've got those 2 connected.
[11:44] <willdude123> http://www.imageupload.co.uk/upload.php
[11:44] <willdude123> Oops.
[11:44] <mattbrejza> yea Darkside the app was developed with the uk's shitty 3G coverage in mind
[11:44] <willdude123> http://www.imageupload.co.uk/files/hec7h9vj9rnrzwvd8b5v.jpg
[11:45] <costyn> willdude123: that's a little hard to make out ;)
[11:45] <willdude123> Oh never mind then.
[11:45] <costyn> willdude123: try putting the board on a table or other light surface
[11:46] <costyn> willdude123: the black background is making the board overexposed
[11:46] <willdude123> I've just got VCC and EN connected to the + rail.
[11:46] <willdude123> Which I'll connect to 5v.
[11:47] <costyn> willdude123: thats fine
[11:48] <willdude123> Does 0v just go straight to the ground rail?
[11:49] <craag> Yep.
[11:49] <willdude123> It looks like it's going via r4.
[11:50] <craag> No. 0v goes straight to ground.
[11:50] <craag> R4 is biasing the input voltage, don't worry about that for now.
[11:51] <costyn> willdude123: R4 is part of the circuit that goes to the TXD pin on the NTX
[11:51] <costyn> willdude123: which also needs a ground
[11:51] <willdude123> Alright.
[11:52] <willdude123> Okay, now for the txd pin.
[11:52] <willdude123> This looks difficult.
[11:52] <craag> Do you have a receiver around? The NTX2 should now be transmitting a single tone.
[11:53] <willdude123> It is, but a little over 434.075mhz.
[11:54] <costyn> willdude123: is it a 434.075 ntx2?
[11:54] <craag> That's fine, now the little circuit on TXD will allow you to vary the frequency for the RTTY.
[11:54] <costyn> willdude123: the exact frequency isn't really important
[11:54] <willdude123> I think it is.
[12:00] <willdude123> Alright.
[12:00] <willdude123> It doesn't look like it is actually.
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[12:00] <willdude123> But I'll go on and do the TXD pin.
[12:01] <costyn> let us know how it goes
[12:01] <willdude123> Heh.
[12:01] <willdude123> I'm going to take a break for a bit.
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[12:09] <Chrisstubbs> Does anybody know what time David miller (caa) office is open to?
[12:10] <jonsowman> 10 to 10.05, 1 day per week
[12:11] <Chrisstubbs> sounds about right
[12:11] <cuddykid> I once had an email from him at 2am!
[12:11] <Chrisstubbs> he seems to be on lunch break most of the day, I can get him at about 2pm on a Wednesday but I'm at work today
[12:11] <jonsowman> waiting for an answer from him Chrisstubbs/
[12:11] <Chrisstubbs> haha
[12:12] <Chrisstubbs> yeah launch window was supposed to start tommorow....
[12:12] <jonsowman> ah
[12:12] <jonsowman> yes just ring when you can
[12:12] <jonsowman> in theory he's there 9-5
[12:12] <Chrisstubbs> think he will be open at 3.45?
[12:12] <jonsowman> should be
[12:12] <jonsowman> there's no telling really
[12:13] <cuddykid> Chrisstubbs: have you checked the map http://notaminfo.com/nationalmap if it's on there yet? Often I find he does it quite a bit before he emails
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[12:14] <Chrisstubbs> Just checked and I can't see it
[12:17] <Chrisstubbs> We aren't actually planning to launch until next week, but won't tell him that
[12:17] <costyn> what's the label for balloon launch?
[12:17] <cuddykid> "free balloon ascent" or something like that
[12:17] <cuddykid> there's quite a few at the mo on the map
[12:18] <costyn> ah yea found one
[12:18] <costyn> upper: unlimited :)
[12:20] <Brace> http://notaminfo.com/explain?id=118344/0 - that'd be a HAB right?
[12:20] <costyn> yea
[12:20] <jonsowman> yep
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[12:27] <Chrisstubbs> Right I shall try again when I finish
[12:27] <Chrisstubbs> Thanks, laters
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[12:28] <fsphil> jonsowman: http://amsat-uk.org/2013/04/03/strand-1-signal-reports-requested/ "no signals have been heard since Sunday"
[12:28] <fsphil> there may be updates since then, I've not heard
[12:32] <jonsowman> thanks :)
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[12:45] <gonzo_> have you seen the actual hex data from strand-1 phil.
[12:45] <gonzo_> there's an example http://ukamsat.files.wordpress.com/2013/02/strand-1-test-of-modem-beacon.png
[12:47] <kokey> heh, just looked at the last XABEN1 flight
[12:48] <kokey> wasn't much of a recovery drive at all
[12:49] <costyn> kokey: well the drive wasn't, but actually finding it ... :)
[12:50] <costyn> kokey: chrisstubbs was having gps/phone issues which made coordinating him there challenging
[12:50] <kokey> haha
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[12:56] <craag> gonzo_: What range did they lose strand-1 at?
[12:57] <cuddykid> wonder if there were breaks in the cloud yesterday over wales - should have captured some great footage over brecons if so
[12:57] <cuddykid> flew over about 5km in altitude
[12:59] <costyn> cuddykid: did chris not look at the footage yet?
[12:59] <cuddykid> he's had a brief look
[13:00] <gonzo_> craag, not a clue. I've not really followed the amsats for a while now
[13:00] <HixWork> costyn, Chrisstubbs was recovering HABE :)
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[13:01] <costyn> HixWork: yes... in reference to what is your comment?
[13:01] <craag> gonzo_: Just wondered how many workbench-lengths it worked up to in the end ;)
[13:01] <HixWork> kokey was talking about roacketboys recovery i think from his comment on the drive
[13:01] <costyn> HixWork: ooh
[13:01] <costyn> HixWork: you're right
[13:02] <costyn> kokey: yes, XABEN != HABE
[13:02] <costyn> my mistake
[13:02] <HixWork> sorry dude, confuzzled me for a sec
[13:02] <Brace> cuddykid: it was clear blue skies here in South Wales yesterday
[13:02] <Brace> you should have some good footage with a bit of luck
[13:02] <cuddykid> woo!
[13:02] <cuddykid> had a stills camera and go pro on board
[13:03] <Brace> I'm interested to see if it captured the spin over the valleys
[13:03] <cuddykid> ah yes
[13:03] <Brace> that was about 10 miles up the road from me
[13:03] <cuddykid> almost did a coast to coast across the UK
[13:04] <eroomde> it was certainly quite a grand tour from the severn esturary to the thames esturary
[13:08] <gonzo_> craag, hehe. Well they did have a UHF beacon as backup!
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[13:24] <willdude123> Hi.
[13:26] <willdude123> Why is it that I'm receiving a solid signal at around 434.06mhz?
[13:26] <costyn> willdude123: what are you expecting?
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[13:27] <willdude123> Nothing.
[13:28] <number10> if you are connected to NTX2 and it has power you will
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[13:28] <willdude123> I'm not though.
[13:29] <costyn> willdude123: then it's outside interference
[13:29] <willdude123> Okay.
[13:31] <willdude123> I'll try and diagnose that.
[13:31] <willdude123> It seems to be comig from my laptop.
[13:31] <costyn> how do you know?
[13:31] <costyn> turning it off and on?
[13:31] <costyn> willdude123: you're using a USB SDR dongle right?
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[13:32] <costyn> willdude123: sure it's not just the peak at the frequency tuning center?
[13:32] <willdude123> I don't know.
[13:32] <costyn> willdude123: http://ukhas.org.uk/guides:sdr_tracker this explains the various bits, including the DC offset
[13:33] <mfa298> costyn: I believe it's an original FCD that willdude123 has
[13:33] <willdude123> It's a pro.
[13:34] <costyn> ah
[13:34] <costyn> I don't know much about those
[13:34] <willdude123> How do I diagnose if it's DC offset?
[13:34] <mfa298> willdude123: it's quite possibly it's picking up interference from somewhere else. all my radio's pickup various carier waves around there. (single stright line on the waterfall / continuous tone when you tune into it
[13:35] <mfa298> DC Offset (I think) would tend to appear as a single carrier wave that always stays in the same place - when you change the tuning
[13:35] <willdude123> I'll check.
[13:36] <willdude123> It's always there.
[13:37] <mfa298> if it stays in the same place when you change the tuning this it's likely to be the DC bias (I think it's usually in the centre of the waterfall)
[13:37] <willdude123> When Upu is around I'll ask him about wiring TXD up.
[13:37] <costyn> willdude123: what do you want to know about TXD? Most of us here have wired up an NTX and can help you
[13:37] <willdude123> It's just how to wire it.
[13:38] <willdude123> I'll take a photo of what I have already.
[13:38] <costyn> ok
[13:38] <costyn> put it on the table like I said earlier
[13:38] <costyn> on a light surface is best
[13:39] <willdude123> They are all quite blurry.
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[13:40] <mfa298> willdude123: it's worth doing small steps, if you havn't already I'd just go for connecting up EN, VCC, 0V and see if you get a tone on the waterfall as you turn it on and off (I'm assuming the NTX2 will transmit a carrier with nothing on TXD)
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[13:41] <willdude123> http://www.imageupload.co.uk/viewer.php?file=6ta4e99a6ki2iqh3cl4p.jpg
[13:42] <willdude123> Should I pulse the positive line and ground the negative in that?
[13:43] <mfa298> I can't really tell what you've got connected from that picture
[13:43] <willdude123> Basically EN and VCC are going to + rail.
[13:43] <costyn> willdude123: get as much light on it as possible and take pics from above :) and closer :)
[13:43] <willdude123> GND is on negative.
[13:43] <costyn> willdude123: it's blurry because the camera shutter is open for a long time because it's dark inside
[13:43] <mfa298> willdude123: that sounds like you've got the right stuff connected.
[13:44] <mfa298> if you connect and disconnect the +ve line to the arduino (assuming thats where the power is comming from) you should see the signal appear and disappear on the sdr.
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[13:45] <willdude123> This any good?
[13:45] <willdude123> http://www.imageupload.co.uk/viewer.php?file=v7e1u628gc7htisxen04.jpg
[13:45] <willdude123> So if I connect the positive to 5v and the negative to ground?
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[13:46] <costyn> still kind of hard to see, but it looks ok
[13:49] <willdude123> Well this is weird.
[13:49] <willdude123> Oh, it because it's on 5v/
[13:49] <daveake> The NTX2 can run fine from 5V
[13:50] <willdude123> It's that I was pulsing on pin 13 and I'd connected it to 5v.
[13:50] <willdude123> So I didn't realize that it shouldn't have pulsed.
[13:50] <daveake> Sorry don't understand. Connected what to 5V?
[13:50] <daveake> The connections on the NTX2 are like so:
[13:51] <daveake> GND - connect to GND (easy that one)
[13:51] <daveake> Power - connect to 5V
[13:51] <daveake> Enable - connect to 5V
[13:51] <willdude123> It's fine now.
[13:51] <daveake> Data - connect to that resistor network and thence to "the output pin of your choice" on the Arduino
[13:52] <willdude123> I just haven't connected TXD up.
[13:52] <willdude123> But I'm pulsing power succesfully.
[13:52] <daveake> pulsing POWER ???
[13:52] <mfa298> daveake: can you confirm my assumption that you'll get a carrier from the ntx2 without anything on txd - or does it need some bias power ?
[13:53] <daveake> Yes you will
[13:53] <daveake> If it has power, and Enable is high, then it transmits
[13:53] <willdude123> Okay.
[13:53] <willdude123> I'm confused now.
[13:53] <daveake> OK, from the start ....
[13:53] <willdude123> I have got everything connected except txd, and I'm just testing it.
[13:54] <mfa298> daveake: I was trying to go for a simple test of connect the bare minimum and see if he can see it on the waterfall as it's turned on and off
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[13:54] <daveake> Fine. With power/enable/ground connected you should get a single (carrier) frequency at about 434.075MHz
[13:54] <willdude123> Yep.
[13:55] <willdude123> Just need to figure how the resistors go.
[13:55] <daveake> (give or take as they vary a bit)
[13:55] <daveake> Well it's as per the diagram as I keep saying
[13:55] <daveake> So, from the data pin on the NTX2, you have 3 resistors
[13:56] <daveake> One goes to ground
[13:56] <daveake> One goes to 5V
[13:56] <daveake> One goes to your Arduino output pin
[13:56] <willdude123> Yep.
[13:56] <daveake> These resistors, and that Arduino pin, change the frequency they DO NOT "pulse" the power or anything like that
[13:57] <gonzo_> arduino are all open collector o/p, daveake ?
[13:57] <HixWork> willdude123, http://stratosvision.com/img/ntx2.png
[13:57] <willdude123> The 20k one is the one that goes to the arduino output and the rest are 4.7k?
[13:57] <costyn> HixWork: nice pic!
[13:57] <daveake> Yes willdude123
[13:57] <costyn> willdude123: yes
[13:57] <HixWork> (c) UKHAS
[13:58] <HixWork> or is that (c) Costyn?
[13:58] <Fail_Academy> http://gushh.net/tmp/arduinoshield.png
[13:58] <Brace> HixWork: I'm totally nicking that pic for when I get my radio!
[13:58] <willdude123> Thanks guys.
[13:58] <HixWork> its a rehash from wiki
[13:58] <Brace> ahh ok
[13:58] <HixWork> though fritzing is really good for those kinda pics
[13:58] <willdude123> Sorry for being an annoying noob by the way.
[13:59] <costyn> HixWork: no, not my pic
[13:59] <HixWork> ahh, possibly Upu's then
[13:59] <costyn> HixWork: yea looks like the ones already on the wiki, except huge :)
[14:00] <HixWork> i never resized it
[14:00] <HixWork> just opened the image from wiki and copied into paint [stylish eh]
[14:00] <costyn> ah
[14:00] <willdude123> Right, power is at 5v.
[14:00] <willdude123> Flat tone being emitted.
[14:02] <Upu> sounds like its working
[14:02] <Upu> afternoon
[14:02] <Upu> ok so load up the normal blink example
[14:02] <willdude123> Now I need to wire up TXD.
[14:02] <Upu> load up blink
[14:02] <willdude123> Done.
[14:02] <Upu> plug TXD into pin 13
[14:02] <willdude123> It works.
[14:02] <willdude123> Wait, oh OK.
[14:03] <willdude123> I need to put the resistors in, no?
[14:03] <Upu> oh yeah sorry thought they were in
[14:03] <daveake> Well without them your output won't do anything to the NTX2
[14:04] <kokey> oh it's BST now?
[14:04] <Upu> unfortunatley yes
[14:04] <kokey> phew I'm glad I set all my clocks to UTC
[14:04] <willdude123> One from TXD to + rail and one from TXD to - rail and one from TXD to pin 13.
[14:05] <daveake> British Shivering Time
[14:05] <daveake> So just like winter really
[14:05] <kokey> I would have had some great screwups this week since I forgot the clocks changed
[14:05] <willdude123> Think I've got it now.
[14:06] <daveake> Upu upupost arrived tvm
[14:06] <Upu> oh was about to ask
[14:06] <Upu> great
[14:06] <willdude123> Thanks daveake, HixWork and costyn for your help, sorry for being a n00b again :).
[14:06] <daveake> You sure you want to use that chute? :)
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[14:06] <HixWork> nps
[14:06] <daveake> willdude123 Take some time to have a think about how the circuit works
[14:06] <willdude123> 09:58 < willdude123> Flat tone being emitted.
[14:06] <willdude123> 09:59 < Upu> sounds like its working
[14:06] <willdude123> 09:59 < Upu> afternoon
[14:06] <willdude123> 09:59 < Upu> ok so load up the normal blink example
[14:06] <willdude123> 09:59 < willdude123> Now I need to wire up TXD.
[14:06] <willdude123> 10:00 < Upu> load up blink
[14:06] <willdude123> 10:00 < willdude123> Done.
[14:06] <willdude123> 10:00 < Upu> plug TXD into pin 13
[14:06] <willdude123> 10:00 < willdude123> It works.
[14:06] <willdude123> 10:00 < willdude123> Wait, oh OK.
[14:06] <Upu> oops
[14:06] <willdude123> 10:00 < willdude123> I need to put the resistors in, no?
[14:06] <Upu> :)
[14:06] <willdude123> 10:00 < Upu> oh yeah sorry thought they were in
[14:06] <willdude123> 10:00 < daveake> Well without them your output won't do anything to the NTX2
[14:06] <willdude123> 10:01 < kokey> oh it's BST now?
[14:06] <willdude123> 10:02 < Upu> unfortunatley yes
[14:07] <willdude123> 10:02 < kokey> phew I'm glad I set all my clocks to UTC
[14:07] <willdude123> 10:02 < willdude123> One from TXD to + rail and one from TXD to - rail and one from TXD to pin 13.
[14:07] <willdude123> 10:02 < daveake> British Shivering Time
[14:07] <eroomde> willdude is actually a robot and a point direction has been revered in his stack
[14:07] <willdude123> 10:02 < daveake> So just like winter really
[14:07] <HixWork> deja vu again
[14:07] <willdude123> 10:02 < kokey> I would have had some great screwups this week since I forgot the clocks changed
[14:07] <willdude123> 10:03 < willdude123> Think I've got it now.
[14:07] <willdude123> 10:03 < daveake> Upu upupost arrived tvm
[14:07] <willdude123> Shoot.
[14:07] <willdude123> I'm so sorry.
[14:07] <willdude123> Putty's right click behaviour is annoying.
[14:07] <Upu> lol
[14:07] <willdude123> You can ban me if you want. :/
[14:07] <Upu> good effort that
[14:07] <eroomde> i'll think about it and get back to you
[14:07] <cuddykid> do we have any people near New York or Chicago or LA here?
[14:07] <eroomde> carry on with the science for now
[14:07] <willdude123> Okay.
[14:08] <eroomde> cuddykid: arko is in LA
[14:08] <G0DJA> What happened there?
[14:08] <cuddykid> thought so - cheers
[14:08] <eroomde> Dan K2VOL was in NY but is no longer i beleive
[14:08] <eroomde> don;t know of any habbers in chicago
[14:08] <eroomde> you'd probably lose all your payloads to the lake or organised crime
[14:08] <cuddykid> haha
[14:09] <HixWork> HAB would get shot in chicago
[14:09] <HixWork> probably just from rocochets
[14:09] <HixWork> though i prefer Rick O'Shea
[14:09] <willdude123> ban me now or ban me later, every schoolboy to his sport, death to each and every traitor, I renounce your people's cour.
[14:10] <willdude123> To quote Les Miserables.
[14:10] <Upu> prefer Les Dawson myself
[14:10] <eroomde> http://stream1.gifsoup.com/view1/1772176/rimshot-o.gif
[14:11] <willdude123> http://stream1.gifsoup.com/view1/1772176/rimshot-o.gif
[14:11] <Upu> haha
[14:11] <willdude123> WTH?
[14:11] <willdude123> I need a better ssh client.
[14:11] <Upu> lurn 2 use putty :)
[14:11] <Upu> you can change that in the settings
[14:11] <willdude123> Les Dawson was the right notes in the wrong order guy, right?
[14:12] <eroomde> well
[14:12] <eroomde> no
[14:12] <eroomde> but yes
[14:12] <eroomde> all the right notes just not necessarily in the right order - from the grieg paino concerto sketch in the morcambe and wise christmas special
[14:12] <eroomde> playing the piano deliberately with wrong notes was a les dawson thing though
[14:12] <eroomde> and it's staggeringly hard to do
[14:13] <willdude123> Ri
[14:13] <willdude123> Right
[14:13] <willdude123> Now for the lat resistor.
[14:13] <eroomde> http://www.youtube.com/watch?v=9nNGlaiVypU
[14:13] <eroomde> i feel like this is the kind of thing Lunar Lander would like
[14:14] <HixWork> heh
[14:14] <eroomde> i just discovered this
[14:14] <eroomde> http://www.youtube.com/watch?v=GCnjb1y4hHw
[14:15] <eroomde> liberace lives!
[14:15] <eroomde> jesus wept
[14:15] <willdude123> I am really intrigued by that but I can't copy the link.
[14:15] <willdude123> Meh I'll risk it.
[14:15] <willdude123> That worked.
[14:16] <Brace> willdude123: I don't know what IRC client you are using, but normally you can put a flow limit on it
[14:16] <willdude123> At first I pictured Upu as Apu off the simpsons.
[14:16] <Brace> so it won't paste more than say 5 lines
[14:16] <Upu> haha
[14:16] <Upu> well I am from Bradford </midlyracist>
[14:16] <willdude123> Then as a poo.
[14:17] <willdude123> And then as Anthony Stirk.
[14:17] <eroomde> http://www.youtube.com/watch?v=e0DHAubgVME
[14:17] <Brace> willdude123: Stark
[14:17] <eroomde> i love the smile at the camera especially
[14:17] <Brace> and stop there
[14:17] <eroomde> i guess he has to be such bright orange so the snowballs can make him out
[14:17] <Upu> I am Lord Stark of that there up North
[14:18] <Brace> cause after you've compared someone to Tony Stark, you can only go downhill
[14:18] <willdude123> Brace: His G+ and Google Groups name is Anthony Stirk.
[14:18] <willdude123> Oh.
[14:18] <willdude123> Iron Man.
[14:19] <willdude123> Well, just like Iron Man, we all need Upu from time to time.
[14:19] <willdude123> :P
[14:19] <Brace> ahh
[14:19] <Upu> I have no idea what you're talking about now
[14:19] <willdude123> Upu: It's wired up now, I think.
[14:19] <Upu> ok well if you take the TXD wire
[14:19] <Upu> and stick it in pin 13
[14:19] <willdude123> http://marvel.com/universe/Iron_Man_%28Anthony_Stark%29
[14:20] <Upu> you should hear a tone change with the illumination of the LED
[14:20] <willdude123> Via a 20k resistor, right?
[14:20] <willdude123> Yep.
[14:21] <willdude123> It works.
[14:21] <Brace> this is excellent - http://serverfault.com/questions/496139/something-is-burning-in-the-server-room-how-can-i-quickly-identify-what-it-is/
[14:21] <Upu> congrats you're transmitting
[14:21] <HixWork> Upu "Tony went to work for Stark Industries, but showed more interest in living a reckless playboy lifestyle than using his engineering skills"
[14:22] <willdude123> It's coming out on 2 sets of frequencies though.
[14:22] <daveake> Yes that's the idea
[14:22] <eroomde> 2 sets of frequencies or 2 frequencies?
[14:22] <daveake> Er, actually, what do you mean "two *sets*?
[14:23] <willdude123> 4 different frequencies.
[14:23] <daveake> You'll get lots of reflections or whatever they are because your transmitter is so close to the receiver
[14:23] <eroomde> oh, is this on an sdr?
[14:23] <eroomde> rather than an ssb radio?
[14:24] <willdude123> I'll jus tuse the strongest.
[14:24] <willdude123> But yep.
[14:24] <eroomde> yeah, that's just fm modulation
[14:24] <eroomde> you'll have a mirror image about the centre frequency
[14:24] <eroomde> carrier frequency*
[14:24] <willdude123> Upu: Should I try and learn what the RTTY code does before I try it?
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[14:25] <eroomde> these are called the sidebands. there are two. you can pick one
[14:25] <Upu> I would try under stand it yes
[14:25] <eroomde> SSB which we talk about means single side band
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[14:25] <Upu> but in short all its doing is doing that high and low tone at a faster rate
[14:25] <willdude123> To make up binary data?
[14:26] <daveake> Yes the highs and lows are 1s and 0s
[14:27] <number10> nice video of xombie http://www.nasa.gov/centers/dryden/news/NewsReleases/2013/13-07.html
[14:27] <eroomde> nice
[14:27] <eroomde> i took a lot of pictures of xombie and xero when i went to masten. they are beautiful. i was v excited
[14:28] <eroomde> the new xaero especially is a stunningly beautiful thing
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[14:29] <number10> great - I would like to see that
[14:29] <willdude123> I'm getting about 550 hz shift?
[14:29] <HixWork> is it a vectoring nozzle eroomde
[14:29] <willdude123> Is that normal.
[14:29] <willdude123> *?
[14:29] <eroomde> HixWork: yes
[14:30] <HixWork> cool
[14:30] <eroomde> that's why i was so interested. they're the big boys for what we're wanting to do with gyroc
[14:30] <HixWork> do you know what the nozzles are made of? inconel oor ceramic?
[14:30] <eroomde> ali
[14:30] <eroomde> (actively cooled)
[14:30] <HixWork> oh wow, thought itd oxidies in an instant
[14:30] <HixWork> *oxidise
[14:30] <HixWork> its friday
[14:31] <eroomde> well it does form an oxide layer tho that's no real biggy
[14:31] <eroomde> that helps if anything
[14:31] <eroomde> but it's temperature is kept below melting by being cooled
[14:31] <HixWork> i was thinking of more like the turn to pwoder type :)
[14:31] <eroomde> essentially with rocket engines you can;t really defeat the heat, the energy density is just massively too much.
[14:32] <eroomde> so you pick things like copper and ali and use cooling, because their thermal conductivity is much higher
[14:32] <HixWork> what sort of FGT are you dealing with
[14:32] <HixWork> EGT
[14:32] <HixWork> god!!!
[14:32] <eroomde> it's a question of getting the heat out and into something else as efficiently as possible rather than trying to just defy it with materials science
[14:32] <eroomde> 2000-3000C
[14:32] <chrisstubbs> If I need exactly 1.8cum od helium, is it a safe idea to get the 1.8cum canister, or should i go for the size up?
[14:32] <eroomde> depends on the propellents
[14:32] <HixWork> fingers, meet nervous system, please talk amongst yourselves
[14:33] <eroomde> chrisstubbs: bigger
[14:33] <willdude123> I have a weird shift Upu.
[14:33] <willdude123> It's big.
[14:33] <HixWork> no stirks in a 1.8 chrisstubbs
[14:33] <chrisstubbs> should be able to get another flight out of it that way too :)
[14:33] <chrisstubbs> sorry not quite up to scratch with my UKHAS units
[14:34] <chrisstubbs> what does a stirk equate to in SI?
[14:34] <eroomde> brb
[14:34] <HixWork> random :)
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[14:35] <chrisstubbs> i think my disposable helium can is on its way, the driver just called me
[14:35] <willdude123> Getting gobbledegook on dl-fldigi.
[14:36] <chrisstubbs> willdude123, go op mode>rtty>custom
[14:36] <chrisstubbs> and ram the shift up a bit, or use custom if its in between two
[14:36] <willdude123> Done, and set to the right settings.
[14:36] <willdude123> It's exactly there now.
[14:36] <chrisstubbs> decoding?
[14:36] <willdude123> No.
[14:36] <eroomde> Rv
[14:36] <willdude123> The shift is right.
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[14:37] <HixWork> and have you got it set to 7N1?
[14:38] <willdude123> Oh, it was on 2 stop bits.
[14:38] <willdude123> Still not working.
[14:38] <HixWork> ah, sorry, are you using wiki code, that is 2 stop
[14:38] <willdude123> Oh ok.
[14:39] <daveake> You can set fldigi to 1 regardless
[14:39] <HixWork> did you try toggling the RV button bottom right as eroomde pointed out?
[14:39] <willdude123> Oh.
[14:39] <willdude123> I'll try.
[14:39] <willdude123> Works.
[14:40] <HixWork> nice
[14:40] <eroomde> congrats
[14:40] <daveake> Is the SDR set to USB or LSB?
[14:40] <eroomde> you have a tracker
[14:40] <daveake> er....
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[14:41] <willdude123> How do I get it to check the checksum.
[14:42] <HixWork> ?
[14:43] <willdude123> The code applies a checksum, can I get DL-fldigi to check it/
[14:43] <willdude123> Also, can it autoscroll?
[14:44] <willdude123> I have to scroll to see new lines.
[14:45] <HixWork> think rightclick in the area where the text appear and then clear it first
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[14:45] <HixWork> Oh, hello me
[14:45] <HixWork> assume my thinkpad woke up
[14:46] <daveake> You only need to worry if it makes more sensible posts than you do :p
[14:47] <willdude123> This is cool.
[14:47] <HixWork> I am already then
[14:47] <jiffe99> how much you guys paying for helium now adays?
[14:47] <eroomde> willdude123: you could fly that now infact
[14:47] <eroomde> even if you just got it to beep at say 1Hz
[14:48] <willdude123> This is cool.
[14:48] <eroomde> we've tracked and recovered flights that have good a good 100 miles using just a 1Hz beeping ntx2
[14:48] <chrisstubbs> jiffe99, http://balloonhelium.co.uk/main/pricing
[14:48] <willdude123> I have a GPS module too.
[14:48] <eroomde> if you have a directional antenna, ideally 2 (and 2 chanse cars) then you can track the old fashioned way
[14:49] <daveake> eroomde Yes indeed
[14:49] <eroomde> we did that with one of jcoxon's payloads once after the main flight computer died at about 1km (the coxon kilometer), but he had thankfully put a random beeper in too so we used that and found it in a paddock somewhere
[14:49] <HixWork> love it when typos construct new appropriate words
[14:50] <eroomde> willdude123: but seeing as you have a gps too then you can do it the easy way :)
[14:50] <willdude123> Upu accidentally sent me a little more kit than he was supposed to.
[14:51] <willdude123> :)
[14:51] <eroomde> he is a bit careless
[14:51] Action: Ciemon smiles at success.
[14:51] <daveake> so clumsy
[14:51] <jiffe99> thats not bad, I was quoted $300 for 3.5m^3 which is about £200
[14:51] Action: willdude123 thanks Ciemon
[14:51] <HixWork> have we found the one thing in the UK that is cheaper than the US?
[14:52] Action: willdude123 thanks him even more for needing to take about five minutes to explain to his parents that his name wasn't 'semen'.
[14:52] <Ciemon> Bane of my bloody life :/
[14:52] <jiffe99> hah, yeah I guess we are wasteful of our helium
[14:53] <daveake> helium wossat? :)
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[14:53] <HixWork> bye me
[14:53] <willdude123> Ciemon: You presented the Ubuntu UK podcast right? Because I told them that to persuade them to let me receive it.
[14:54] <Ciemon> Yeah that's me :) Good times.
[14:55] <willdude123> Something tells me waitingcloud.org isn't your website anymore.
[14:56] <Ciemon> Indeed! I only have one domain now, which I host here. I gave up on VPS' mainly because of the cost, and that I wasn't really using it anymore.
[14:58] <willdude123> Which way does the habamp go in?
[14:58] <chrisstubbs> look at the photos on upus store
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[15:00] <costyn> willdude123: careful to connect + and - correctly. if you reverse the polarity, you'll have to send it back to Upu to replace the amp
[15:00] <costyn> willdude123: I speak from experience :)
[15:00] <Upu> https://dl.dropbox.com/u/63720513/Images/HAB/HAB%20Filter/rfinout.jpg
[15:00] <costyn> Upu: I noticed you're no longer selling usb sdr sticks on your store?
[15:01] <willdude123> Not to disrespect Iron Man, but they are cheaper elsewhere, I think.
[15:01] <willdude123> costyn: I think I've got it right.
[15:01] <willdude123> It's working.
[15:01] <willdude123> :|
[15:02] <costyn> willdude123: cool
[15:02] <HixWork> costyn https://www.cosycave.co.uk/product.php?id_product=288
[15:02] <costyn> HixWork: adapters are a nice touch
[15:02] <Upu> yeah not much point
[15:02] <chrisstubbs> ping cuddykid: your payload is in the post :)
[15:02] <Upu> that said that 820 based one I got from cozycave is useless
[15:02] <costyn> Upu: well I liked the SMA launch and diode options
[15:02] <Upu> drift is dire
[15:02] <Upu> and it couldn't hear XABEN yesterday
[15:03] <cuddykid> thanks chrisstubbs
[15:03] <willdude123> Upu: HABamp is working, thanks very much.
[15:03] <HixWork> cuddykid, http://hackaday.com/2013/03/19/diy-arduino-pro-mini-quadcopter/
[15:03] <Upu> super
[15:03] <willdude123> I just don't know if I'll hear anything.
[15:04] <Upu> well tomorrow is a launch from close to you
[15:04] <cuddykid> nice
[15:04] <Upu> so best chances
[15:04] <costyn> willdude123: wait for tommorow, there'll be enough launches
[15:04] <costyn> willdude123: and your own ntx :)
[15:04] <Upu> afk
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[15:07] <chrisstubbs> Helium ordered, and i spoke to david miller and he is sorting out the application tonight :)
[15:08] <willdude123> What are the other 3 pins on NTX2 for?
[15:08] <eroomde> i bet he is
[15:09] <Ciemon> Is there a preferred supplier of PCB manufacurer in the country? My son just ordered from the USA as the turn around time and cost are much better than he could find here.
[15:09] <eroomde> willdude123: which have you got connected up at the moment?
[15:09] <eroomde> the UK is not the best place Ciemon
[15:09] <eroomde> a lot of us use chinese firms for the same reason
[15:10] <Upu> willdude123 center pin is the NTX2's antenna
[15:10] <Upu> two at each side are gnd
[15:10] <Ciemon> This USA company outsources to Malaysia, probably to get around ITAR faffs
[15:10] <eroomde> you're well catered for if you're a business and need it within 4 days and £100 is not much money to you, but for hobbysists it's often the other way round
[15:10] <willdude123> eroomde: All except RFGND, RFOUT and RFGND2.
[15:10] <Upu> did you say you had the RTTY example working and decoding willdude123 ?
[15:10] <eroomde> Ciemon: i suspect it has nothing to do with ITAR and everything to do with cost of labour
[15:10] <Ciemon> willdude123: the best thing to d, with all new things is to get the accompanying data sheet.
[15:10] <eroomde> willdude123: so the three at the end
[15:11] <eroomde> they're the bits you connect the antenna too
[15:11] <chrisstubbs> Yeah the uBlox datasheets are a nice bedtime read
[15:11] <eroomde> RFGND and RFGND2 are the same thing, they're internally connected. rfgnd is the actual radio signal
[15:11] <TylerK> does anyone have any suggestions for the best type of antennas to use?
[15:12] <eroomde> for sending from the balloon or receiving on the ground?
[15:12] <willdude123> Can I get dl-fldigi to check the checksum?
[15:12] <chrisstubbs> TylerK for receiving or transmitting?
[15:12] <Upu> did you uncomment the checksum code ?
[15:12] <TylerK> receiving
[15:12] <TylerK> chrisstubs: receiving
[15:12] Action: chrisstubbs hides for the antenna fight
[15:12] <eroomde> you have 2 categories - directional or not directional (omnicdirectional)
[15:12] <griffonbot> Received email: Nicole Blake "Re: [UKHAS] Re: Launch announcement - WUSAT - Sat 6th - near Welshpool"
[15:13] Action: Brace feels this could be a good wiki article
[15:13] <eroomde> if you want to plonk something on the car or the roof statically, you obviously want omnidirectional. colinears are popular
[15:13] <eroomde> just a 1/4wave with ground plane is good too
[15:13] <willdude123> Upu: It is uncommented, I think.
[15:13] <willdude123> There is a checksum coming.
[15:14] <eroomde> TylerK: if you want a specific model, the Watson W-50 colinear has a few users on this channel
[15:14] <willdude123> But dl-fldigi doesn't 'check' it.
[15:15] <TylerK> ok I will look into those
[15:15] <Upu> screen shot of dl-fldigi pls Will
[15:16] <HixWork> what happens to time at this time every friday? :/
[15:16] <fsphil> it's properly like a spring day here. it's *warm*. I'm scared
[15:16] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] AVA Launch Saturday 6th"
[15:17] <HixWork> got your nestcams ready fsphil ? gotta be starting soon
[15:18] <fsphil> HixWork: just doing that now infact. the male GT was in the box earlier, trying to get the female in. almost successful
[15:18] <HixWork> cool
[15:18] <fsphil> I can't remember what each wire does though. every year this happens, and I always say 'right, make a note or a diagram for next time'
[15:18] <fsphil> never do
[15:19] <HixWork> this year is your time then
[15:19] <HixWork> :)
[15:19] <TylerK> What type of antennas do you suggest for transmitting without it being too isotropic?
[15:19] <willdude123> Upu: I'm just sorting one.
[15:19] <chrisstubbs> 1/4 wave with 4 radials is pretty common
[15:20] <chrisstubbs> but obviously that radiates most power down (if thats the way its pointing)
[15:20] <mfa298> I don't like that prediction for AVA, I'd like a bit more westerly in it first so I can track it.
[15:20] <eroomde> but not directly down
[15:20] <willdude123> There you go: http://www.imageupload.co.uk/viewer.php?file=jc86nbu30wyeruvzzwkr.jpg
[15:21] <Upu> ah ok
[15:21] <Upu> run it in HAB mode
[15:21] <Upu> dl-fldigi
[15:21] <gonzo_> a 1/4 wave gp will tend to radiate mainly out towards the horison
[15:21] <TylerK> if the antenna is mounted on the bottom, will it be able to transmit as long as its above your horizon for most of the flight?
[15:21] <Upu> i.e stick -hab on the end of the line you start the program with
[15:22] <fsphil> you know that should probably be the default
[15:22] <Upu> yep
[15:22] <Upu> hey fsphil
[15:22] <willdude123> Started in HAB mode.
[15:22] <Upu> auto shift tracking ?
[15:22] <fsphil> interesting idea
[15:23] <gonzo_> I think you can make it radiate in the direction of the driven element (towards the ground) a bit, if yopu cant the GP radials away from the DE a bit
[15:23] <fsphil> with limits either way
[15:23] <willdude123> Upu: What now?
[15:23] <fsphil> brb
[15:23] <Upu> should have a box at the top where it goes green if it has decoded
[15:23] <willdude123> Nope.
[15:23] <Upu> sure you're in HAB mode ?
[15:23] <willdude123> Screen shot?
[15:24] <Upu> y
[15:24] <chrisstubbs> launch conditions look good for this weekend, airwaves will be a little crowded though
[15:24] <Upu> nah
[15:24] <chrisstubbs> think i will stick with next weekend
[15:25] <willdude123> Why can't I make dl-fldigi fullscreen?
[15:25] <Upu> *smiles*
[15:25] <Upu> soon ....
[15:25] <Upu> its a feature
[15:26] <willdude123> I could in normal mode.
[15:26] <Upu> yeah don't worry in the new versions you can make it full screen
[15:26] <Upu> just not in that one
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[15:27] <willdude123> http://www.imageupload.co.uk/viewer.php?file=mmvw682mnysic7tfpkg7.jpg
[15:27] <Upu> oh
[15:27] <Upu> stick $$ in front of your sentence
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[15:28] <Upu> $$WILLHAB,blab...
[15:28] <willdude123> $$WILL message.
[15:28] <willdude123> ?
[15:29] <Upu> yeah put a comma in
[15:29] <Upu> spaces aren't needed
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[15:30] <HixWork> anything fub I can add to my tracker with the 2 spare digital pins i broke out
[15:30] <HixWork> didnt do analogue ones unfortunately
[15:30] <Upu> LEDS!
[15:30] <HixWork> pink upu?
[15:31] <Upu> sure why not
[15:31] <HixWork> heh
[15:31] <HixWork> rhetorical :)
[15:31] <Upu> indeed
[15:31] <HixWork> ok, anything useful?
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[15:31] <Upu> LEDS!
[15:31] <Upu> + launch at night
[15:31] <HixWork> most sensors are analogue yes?
[15:31] <willdude123> Yay. I'm going to go round the house and see if I still get signal
[15:31] <Upu> :)
[15:32] <eroomde> HixWork: got pyro channels for cutdowns?~
[15:32] <chrisstubbs> Hix onewire temp sensor?
[15:32] <HixWork> Thought of evening launch for sunset banding in images
[15:32] <Ciemon> He'll be walking 'round the streets with it soon.
[15:32] <HixWork> eroomde, looking into geofence with a single channel pyro
[15:32] <HixWork> though not got a lot of confidence
[15:32] <eroomde> but do you have the cirtcuitry to fire the pyro?
[15:32] <HixWork> same with my GSM boards
[15:32] <eroomde> if not then one of the spare pins would do nicely
[15:33] <HixWork> no eroomde not looked into it, guessing transistor to batt pack
[15:33] <HixWork> and maybe nichrome
[15:33] <eroomde> there are a bunch of ways and varying levels of gucciness
[15:34] <HixWork> though proper pyro seems better
[15:34] <eroomde> at the very least put a high power low ohmic value resistor in series
[15:34] <eroomde> like 1 or 2 ohms
[15:34] <eroomde> that will stop you blowing the pyro to bits
[15:34] <eroomde> or rather the hotwire in the e-match
[15:34] <eroomde> if you short a batt pack directly through them they can heat up and break too quickly, before they have ignited all the pyrogen around them
[15:35] <HixWork> oh, ok
[15:35] <eroomde> I'd have a decent cap aswell so it's not the batt pack providing all the current, which risks browning out the rest of the circuit
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[15:35] <willdude123> Looking forward to attempting to receive actual balloon signals.
[15:36] <eroomde> and finally, some sort of arming link, or led that shows when the mosfet is on, and /or continuity check would be very useful
[15:36] <willdude123> daveake: Are you launching PIE5 at the same time as you are pAVA?
[15:36] <HixWork> there doesn't seem to be too much cutdown stuff on the wiki to be fair
[15:36] <eroomde> i highly commend continuity chcking - it lets you know the pyro circuit is healthy
[15:36] <willdude123> Upu Did you manage to get rid of the spam?
[15:36] <chrisstubbs> i wondered why the cutdown ddint brown out the arduino, making the cutdown turn itself off before it blows. Surprised the cap puts out enough juice
[15:36] <daveake> willdude123 No
[15:36] <Upu> yeah I rm -rf'd the Wiki
[15:36] <Upu> I thought I'd disabled registrations
[15:36] <Upu> guess not
[15:36] <eroomde> HixWork: well, it can be as simple or as complicated as you like really :)
[15:36] <HixWork> i continuity check everything these days even before soldering i did boards
[15:36] <Upu> I'll reconstruct it
[15:36] <gonzo_> and take care that the i/o line is not in the fire condition till the SW had started up
[15:37] <Upu> thanks for noticing it
[15:37] <HixWork> K.I.S.S is always a good mantra
[15:37] <eroomde> well, where S = safe
[15:37] <eroomde> when it comes to pyros
[15:37] <HixWork> spectacular :)
[15:37] <eroomde> for rockets i do things like galvanically isolated pyro circuits
[15:38] <eroomde> so that the pyro line can't find a path back to battry gnd through any metalwork
[15:38] <eroomde> i'd recommend against lowside mosfets for the same reason, though that makes the firing circuit a bit more complicated
[15:38] <Randomskk> "Don't even try to look for your 0201 surface mount part If you hear the tweezers click. Game over man. Game over!"
[15:38] <Randomskk> hah
[15:39] <Upu> haha
[15:39] <Upu> damn right :)
[15:39] <eroomde> I aven have 1M resistors between circuit GND and the metal case to prevent static from building up
[15:39] <willdude123> Upu: Did you back stuff up or are you rewriting?
[15:39] <HixWork> vaseline a good idea for tiny smd stuff, surely it'd disappear with tthe hot air
[15:39] <Upu> there was only 3 articles on there
[15:41] <willdude123> So to make the code 300 baud, I need to have just delayMicroseconds(3370) ?
[15:41] <Upu> well yes but Arduino delay timing is pants
[15:41] <Upu> just keep it at 50 baud
[15:41] <willdude123> Okay :)
[15:41] <Upu> or switch to interrupt based code like what it should be
[15:42] <Upu> http://ava.upuaut.net/?p=408
[15:42] <willdude123> Interrupt based code is where instead of two frequencies it's just on and off?
[15:42] <willdude123> Right>
[15:43] <mclane> no
[15:43] <mclane> it means that the transmission is run as an interrupt service routine
[15:43] <Upu> ok say you have the blink code running
[15:43] <Upu> and you have an interrupt running
[15:43] <mclane> still 2 frequencies
[15:43] <eroomde> HixWork: would recommend then the following
[15:44] <eroomde> a big cap to suppy the energy needed for the pyro
[15:44] <Upu> every 50µS (or whatever you set the interrupt too) it will jump to the interrupt code and execute that
[15:44] <Upu> the interrupt timer is very accurate
[15:44] <eroomde> a 10k resistor in parallel with it to stop it from holding charge when power is off
[15:44] <Upu> so instead of delay you are timing it better
[15:44] <eroomde> a logic level mosfet, ideally high side if you can find it
[15:44] <eroomde> a 1 ohm resisotr in series
[15:44] <eroomde> continuity testiung
[15:44] <HixWork> when you say big cap - what sort of F
[15:44] <Upu> there are benefits as the rest of your code carries on
[15:45] <Upu> there are down sides as the rest of your code carries on
[15:45] <Upu> you have to be careful
[15:45] <HixWork> do you have any sample schematics eroomde ?
[15:45] <eroomde> could draw one in about 20s but have to go outside now
[15:45] <eroomde> bbl
[15:45] <HixWork> nps
[15:45] <HixWork> I'll psend the rest of my friday researching cutdown
[15:45] <HixWork> [at work]
[15:46] <Upu> basically my code uses a state machine when it jumps to it, it is like "ok what should I be doing this tick"
[15:46] <HixWork> bored.com here
[15:47] <chrisstubbs> HixWork, coming to baz next week to pick up my He
[15:47] <HixWork> Vegas baaaaaby
[15:48] <chrisstubbs> I honestly didnt belive the sign the first time i saw it :P
[15:48] <HixWork> bad isn't it
[15:48] <chrisstubbs> no comment :P
[15:49] <HixWork> I only work here - fill your boots :)
[15:49] <chrisstubbs> so it turns out there is a - sign and a logo that looks a lot like a + sign on the negative side of kodak batteries
[15:49] <chrisstubbs> nice one
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[15:50] <chrisstubbs> i managed to lose a pack of 10 AA's out tracking last night too. No idea how
[15:51] <jonsowman> Upu: around?
[15:53] <HixWork> you launching Sat week chrisstubbs
[15:53] <chrisstubbs> yeah man :)
[15:54] <HixWork> youre hourly is down so im using mine to try and work out your flightpath
[15:54] <chrisstubbs> oh yeah i messed up the port forward for the robot arm software
[15:54] <HixWork> thpough at mo it looks like Dunkirk
[15:54] <HixWork> http://flight-predictor.widerimage.co.uk/
[15:54] <chrisstubbs> yeah lol
[15:55] <chrisstubbs> yeah about the same on mine local
[15:55] <HixWork> i think F6AGV is near there [ish]
[15:55] <HixWork> and callsign is prob wrong
[15:55] <HixWork> but simijlar
[15:55] <HixWork> Alan the radiosonde site guy i think
[15:56] <chrisstubbs> oh the cup payload?
[15:57] <HixWork> nope, he waas norsk
[15:58] <HixWork> http://alerte-radiosondes.blogspot.co.uk/wow callsign was right
[15:58] <HixWork> http://alerte-radiosondes.blogspot.co.uk/
[15:58] <HixWork> as i screwed link up foirst go
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[15:59] <chrisstubbs> ahh
[15:59] <chrisstubbs> cool :) he put a link to my blog on his site but spelt the URL wrong?
[15:59] <chrisstubbs> who types out urls?
[16:00] <chrisstubbs> hourly is up now
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[16:00] <HixWork> heh
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[16:02] <chrisstubbs> yayyyy CAA permission :)
[16:02] <HixWork> sweeet
[16:02] <HixWork> so DM does work on day before principle then
[16:02] <chrisstubbs> yeah
[16:03] <chrisstubbs> wind has to be forecast going NE though
[16:03] <chrisstubbs> and im only allowed one launch?
[16:03] <chrisstubbs> this dosent really seem worth the hassle
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[16:04] <HixWork> youre sacrificing the payload for sure then
[16:04] <chrisstubbs> weather predictions are so bad im sure i can find a site with a NE prediction
[16:04] <HixWork> to be fair, are they talking surface wind
[16:04] <chrisstubbs> print that out
[16:04] <chrisstubbs> dosent say
[16:04] <HixWork> as that really doesn't affect a lot
[16:05] <HixWork> just do your own ion photoshop
[16:05] <HixWork> :)
[16:05] <chrisstubbs> "the launch shall only take place when the forecast winds indicate that the balloon will drift in a north easterly direction"
[16:05] <chrisstubbs> hix ssh
[16:06] <chrisstubbs> do me one in ACAD
[16:06] <HixWork> dont' use ACAD sorry dude
[16:07] <HixWork> it'll drift NE at some point for sure :)
[16:07] <Upu> ping jonsowman
[16:07] <Upu> here now
[16:08] <HixWork> chrisstubbs, did cuddykid have any pics of the hood from the descent or cloudbase too low?
[16:09] <chrisstubbs> cam cut out before burst
[16:09] <jonsowman> hi Upu
[16:09] <HixWork> canon too?
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[16:09] <jonsowman> just a couple of comments on your interrupt rtty code if you have a minute or care :)
[16:09] <chrisstubbs> yeah
[16:09] <HixWork> bummer
[16:09] <Upu> please do
[16:10] <jonsowman> Upu: mainly that if the interrupt happens to fire between lines 67-70 then you'll get a string without a checksum
[16:10] <jonsowman> you can just do the sprintf atomically
[16:10] <jonsowman> sprintf(buf, "%s*%s", telem, checksum)
[16:11] <Upu> ah
[16:11] <Upu> note https://github.com/Upuaut/Ava/blob/master/fc0334_PavaR7_PAVA_550/fc0334_PavaR7_PAVA_550.ino
[16:11] <Upu> line 545
[16:11] <HixWork> who was asking about canadian HABbers the other day?
[16:11] <HixWork> found this http://goo.gl/1sBRR
[16:11] <Upu> locks variables
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[16:11] <jonsowman> ah cool :)
[16:11] <Upu> constructs string
[16:11] <Upu> unlocks
[16:11] <Upu> yes it was a very basic example
[16:11] <jonsowman> sure yes
[16:12] <Upu> which was then refined for the flight code
[16:12] <jonsowman> yeah
[16:12] <jonsowman> the other thing was that you can save 80 bytes of ram by not having two buffers, but just cahgne line 66 to if(txstatus == 2) { sprintf... }
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[16:12] <jonsowman> then you don't need to take a copy of the buffer to prevent it changing
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[16:13] <Upu> also missing from flight code :)
[16:13] <jonsowman> :)
[16:13] <Upu> Really happy you're telling me this actually means I've actually thought about it :)
[16:14] <jonsowman> yes it says a lot that you've already fixed these things :)
[16:14] <Upu> though fsphil did point out the need to lock variables
[16:14] <jonsowman> yeah
[16:14] <Upu> credit where credit is due
[16:16] <Upu> cheers for taking a look anyway dog walk time
[16:16] <jonsowman> yw :)
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[16:27] <griffonbot> Received email: Steve Aerospace "[UKHAS] Launch announcement XABEN46 - Sunday 7th."
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[16:34] <eroomde> Hix what is your system voltage?
[16:34] <griffonbot> Received email: Geoff Mather "Re: [UKHAS] Launch announcement XABEN46 - Sunday 7th."
[16:34] <eroomde> oh, missed him
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[16:36] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] Launch announcement XABEN46 - Sunday 7th."
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[16:38] <mattbrejza> i see all the cool kids have somehow got themselves a max 7 :P
[16:40] <anerDev> hey hey guys !
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[16:48] <Upu> the only two in existance*
[16:48] <Upu> are going up tomorrow
[16:48] <Upu> *sure there is more I just can't get nay
[16:49] <G0DJA> I guess you can get Nay as you have none Upu ;)
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[16:49] <Upu> indeed :)
[16:51] <G0DJA> imming then Tescruds to get something for tea
[16:51] <G0DJA> Ooops
[16:52] <G0DJA> Swimming
[16:54] <Babs> Some extreme polystyrene-ing pre-Friday beers http://www.flickr.com/photos/91049302@N00/8622543326/in/set-72157632733154985 http://www.flickr.com/photos/91049302@N00/8621441515/in/set-72157632733154985/ http://www.flickr.com/photos/91049302@N00/8622607640/in/set-72157632733154985/
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[16:56] <chrisstubbs> babs cool! were those made on a mill?
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[16:56] <chrisstubbs> and the white bits 3d printed by the looks of it?
[16:56] <chrisstubbs> oh no i see foam layers :)
[16:57] <Babs> chrisstubbs. No, by hand. The far away perspective flatters my scalpel skills a bit. I got jealous of everyones extruded polystyrene so decided to get myself some.
[16:57] <Babs> white bits are 3-D printed
[16:58] <chrisstubbs> very nice, i like it :)
[16:58] <Babs> extruded polystyrene is the business. I can't believe I got so much white c**p over my house before cutting the other stuff up.
[16:59] <chrisstubbs> those 3d prints look very neat, what did you do them on?
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[17:00] <G0DJA> Your sending a 550D up?! Where from :)
[17:01] <G0DJA> You're - even
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[17:01] <arko> morning
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[17:03] <willdude123> Hello
[17:03] <Babs> G0DJA - don't know yet. May just test the capsule first with the tracker, there is a bunch of new stuff up there that I have no data on (3D printed polymer under low temperatures, a new tracker etc.) so it probably makes sense rather than just doing an all up test
[17:03] <eroomde> Babs: good stuff
[17:04] <eroomde> which igniters are you using in the pyros?
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[17:07] <Babs> eroomde - Reloder (sic) 7 black powder. Do you have any experience of using it? (seems to work OK when I've tested it, although I need to find a spare place to keep the bucketloads of spare i have left over, given the bang that the small amount in the pyros I've tested generates)
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[17:08] <eroomde> actually yes i think I have :)
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[17:08] <eroomde> but i mean the e-matches themselves
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[17:10] <arko> wow Babs, amazing assembly!
[17:10] <Babs> ahh ok, http://www.elitemodelsonline.co.uk/Products/Fun-Stuff/Rockets/Accessories/13362-/Model-Rocket-Igniters---6-pk
[17:11] <eroomde> ah yes
[17:11] <Babs> the only pain is that the arduino nano that I have to set them off doesn't seem to generate enough voltage to kick them off
[17:11] <eroomde> relevent health warning from further up in the thread - those ones can be a bit delicate to lots of current
[17:11] <eroomde> oh right!
[17:11] <eroomde> you have the opposite problem
[17:11] <Babs> which means I have to use an optocoupler onto a separate circuit linked to a 9V to set them off
[17:12] <eroomde> usually they disintegrate before they have lit the pyrogenic material around them
[17:12] <eroomde> that's usually the case with them
[17:12] <Babs> That hasn't been a problem thus far as the cats in my house can testify ;-)
[17:12] <eroomde> i would just very strongly recommend a high power 1 or 2 ohm resistor in series with them
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[17:12] <eroomde> to limit the current a bit
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[17:13] <Babs> Limit it from the (V?
[17:13] <Babs> 9V?
[17:13] <eroomde> yes
[17:13] <willdude123> Upu: Broke a radial :)
[17:13] <willdude123> *:(
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[17:13] <Babs> how come? can they malfunction through too much current?
[17:13] <eroomde> especially the high performance lithium energizer ultimate 9V batteries which will happily deliver many amps
[17:13] <Babs> ie do you want a slow burn
[17:13] <eroomde> yes that's exactly it
[17:14] <eroomde> too much current can cause them to blow too quickly
[17:14] <eroomde> the little bit of resistence wire just snaps
[17:14] <eroomde> before it has the chance to heat up and ignite the pyrogenic coating
[17:14] <Babs> naive question - whats a high power resistor?
[17:14] <eroomde> much like a bulb blowing
[17:14] <eroomde> it's a resisotr that can dissipate higher powers
[17:15] <eroomde> so the equation for power is power = current^2 x resistence
[17:15] <Hix> babs, most through ho.e resistors are 1/4 or 1/2 watt
[17:15] <Hix> high power i'm guessing eroomde is referring to 2 or 3W
[17:16] <eroomde> and lets say you have a 2 ohm resistor with a 9V supply, the current going through it would be about 4.5A (though in actual fact less because of other resistences), and so the power it dissipates would be 4.5^2 * 2
[17:16] <Babs> eroomde, do you have any photos of how you have mounted the cutdowns to avoid fracturing the wire arms as the payload spins? I can see that might be a problem too if there is a bit of back and forth
[17:16] <eroomde> = 40W!
[17:16] <eroomde> Babs: the fracturing isn't due to mechanical forces
[17:17] <Babs> Any more wattage and I might as well just link up a household bulb and track the thing visually ;-)
[17:17] <eroomde> but yes, the single core wire shouldn't be trusted for any kind of movement as it will work harden and snap
[17:17] <Babs> Sorry, I was moving on from the current point
[17:17] <eroomde> but back to the resistor, you don't need one that big really because it's only on for a fraction of a second
[17:17] <Hix> I remember i had an old Tamiya Grasshopper rc car as a kid, that had a big old ceramic resistor on the mech speed controller
[17:17] <Hix> it hot as hot as hell
[17:18] <Babs> if the bottom and top loops on the pyro are moving independently, then I would imagine it has potential to keep bending the arms back and forth depending on how it is mounted
[17:18] <eroomde> but you can get power resistors in a to-220 case which will do the job nicely. eg: http://uk.farnell.com/bourns/pwr220t-35-2r20j/resistor-power-2r-0-05-35w/dp/2101733
[17:19] <eroomde> i'd put that in series with your firing circuit. that will stop the massive inrush current which can thermall shock the igniter into breaking
[17:19] <eroomde> a lot of hobby rocket launches often fail because of the absense of a current limiting resistor
[17:19] <Hix> that kinda wattage eroomde ?
[17:19] <Hix> i was expecting 2 or 3
[17:19] <Hix> based on 2xAA lithiums
[17:19] <eroomde> well, it doesn't really need to be that high but given it's a cheap and convenient form factor, makes little difference
[17:19] <eroomde> Hix: he's using 9V
[17:20] <Hix> ahh
[17:20] <Hix> why 9v?
[17:20] <Babs> I had a 9V left over....
[17:20] <Hix> is this totally separate from the tracker?
[17:20] <Hix> ah oki babs
[17:20] <Hix> fair nuff
[17:20] <eroomde> Babs: i would keep the igniter lines themselves short
[17:20] <eroomde> and attach to them with multicore wire
[17:21] <eroomde> i am v impressed with the 3D printed rod interconnects
[17:21] <eroomde> they're the perfect solution
[17:21] <Babs> Yes, it has to be separate as otherwise it will negate the use of the gimbal which is designed to stop it spinning http://www.flickr.com/photos/91049302@N00/8589745881/in/set-72157632733154985
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[17:22] Nick change: chrisstubbs -> csaway
[17:22] <Babs> thanks eroomde - I just downloaded sketchup and worked off that and a bit of mechanical theory on how stresses and strains would operate whilst trying to limit the use of material as much as possible
[17:22] <Hix> eroomde: cue say no to vertical video :)
[17:23] <arko> wow, that's pretty wild
[17:23] <Babs> as the printers charge by cm^3 so if you use less you pay less
[17:23] <eroomde> who did you use?
[17:23] <eroomde> shapeways?
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[17:23] <Hix> there are a few designs around using various diameters of pvc pipe to achieve the same system
[17:24] <Babs> no, 3-D printuk http://www.3dprint-uk.co.uk/
[17:24] <Hix> Babs: is the gimbal for the camera alone or the whole payload?
[17:24] <Babs> He's a young guy who bought a printer with a bit of money his gran left him and has built a whole business around it
[17:25] <Babs> good luck to that kind of person. I gather he's about to get an SLS in if he has raised the cash
[17:25] <eroomde> a few months ago i want to see the large-scale version of this
[17:25] <eroomde> http://farm9.staticflickr.com/8190/8150532964_1791c74040_b.jpg
[17:25] <mclane> Hix around?
[17:25] <eroomde> they're flying an IR telescope from a very large balloon around the antarctic
[17:25] <eroomde> but same construction technique
[17:25] <Hix> hello mclane
[17:25] <arko> wow
[17:26] <arko> that must weigh a ton
[17:26] <eroomde> several
[17:26] <arko> heh
[17:26] <Hix> you wouldn't believe how much RP an F1 team gets through in 24 hours never mind a season
[17:26] <eroomde> well, all up it's about 3 tonnes iirc
[17:26] <mclane> Hello Hix; quick question: I try to log into your hourly prediction VM but the credentials published on the wiki do not work
[17:26] <arko> i dont want to imagine the gas cost
[17:26] <eroomde> http://farm7.staticflickr.com/6042/6280172852_cbe581ecf0_b.jpg
[17:26] <arko> wow
[17:27] <Hix> mclane - the wiki is WIP, you can't log into my hourly
[17:27] <arko> who is this?
[17:27] <eroomde> this is spider
[17:27] <Babs> Hix - the gimbal sits above the capsule and below some counterweights. Here's a picture of me rocking the capsule (vs. rocking the line which would go to the balloon) in my frankly embarrassing first attempt at constructing the polystyrene capsule http://www.flickr.com/photos/91049302@N00/8589746393/in/set-72157632733154985
[17:27] <eroomde> the successor to blast
[17:27] <eroomde> BLAST
[17:27] <Babs> You can see the gimbal in the middle
[17:28] <mclane> Hix: I mean I have downloaded the image and run it on my own machine
[17:28] <eroomde> it's a big thing with universities of toronto, penn, princeton and a couple in the UK
[17:28] <Hix> mclane http://tn22.com/chris.stubbs/www/
[17:28] <Babs> eroomde - are they carrying that without a crane because its that light?
[17:28] <arko> Babs: are those counterweights motors?
[17:28] <eroomde> Babs: yes
[17:28] <Hix> should be the image, though you'll have to ask chjrisstubbs [away presently] the credentials fo rthe image
[17:28] <eroomde> though it's still pretty heavy
[17:28] <Hix> I will update the wiki in due course
[17:28] <Hix> babs, thats pretty neat
[17:28] <mclane> Hix: yea, this is what I downloaded; but how can I log into it??
[17:29] <eroomde> http://farm7.staticflickr.com/6173/6201257941_8a779d6ac2_b.jpg
[17:29] <Hix> you'll have to get info from chris
[17:29] <eroomde> the big white thing behind them is the instrument itself that sits in the middle
[17:29] <Hix> I've not got for it anymore
[17:29] <Babs> Its still phenomenal though how light that kind of stuff is. I had an elevator of a harrier in my hands once and it felt like cardboard in terms of weight
[17:29] <eroomde> it's stabilised with a reaction wheel and motors of roll and elevation
[17:29] <eroomde> it's a crystal, kept cool for several weeks by liquid helium
[17:29] <mclane> Ah ok; which chris?
[17:29] <eroomde> the 7 blanking caps in the top are where the 7 telescopes will go
[17:30] <mclane> stubbs?
[17:30] <Babs> arko: yes, I thought if I could make use of the weight by making it a spinning wheel, I didn't think it would do much harm
[17:30] <arko> hmm interesting, i was wondering how they controlled the temperature of the lens
[17:30] <Babs> in terms of keeping it stable
[17:30] <arko> Babs ah ok, i was wondering, looked like an active counterweight
[17:31] <arko> the spinning wont cause images to be blurry or wiggly?
[17:31] <Babs> It will be interesting to see how the time to return to horizontal and stable is affected whether the motors are on or off
[17:31] <arko> like vibrations from wheel
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[17:32] <Babs> My estimation is that it won't affect it much! but you don't get anywhere by not trying
[17:32] <Hix> mclane chrisstubbs
[17:32] <arko> Babs heh good point
[17:32] <eroomde> http://galadriel.astro.utoronto.ca/ballast/wp-content/uploads/2011/04/IMG_01051.jpg
[17:32] <Hix> mclane he is currently csaway
[17:32] <eroomde> you can see their reaction wheel just behind it
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[17:32] <arko> one good test would be to just set the wheel at fullspeed and do a vibration test
[17:32] <arko> snap a few shots and see the effects
[17:32] <Babs> the vibrations aren't actually that bad. The tolerances on the 3-D print are 0.1mm so everything is lined up pretty accurately.
[17:32] <eroomde> which sits under the green fibreglass floor in the gondola
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[17:33] <arko> wow car batteries haha
[17:33] <arko> oh cool
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[17:33] <arko> yeah, a well balanced wheel would help :P
[17:34] <Babs> and then I balanced the wheels using a really sensitive set of scales that I'm sure are used for more dubious things normally http://www.amazon.co.uk/American-Signature-Series-AWS-100-Digital/dp/B0012LOQUQ/ref=pd_sim_diy_6
[17:34] <Babs> and some moped scooterweights (it took a while to explain to the mechanic just what i was doing with them)
[17:34] <eroomde> the gas turbine builders association (RC hobby people) published for many years a good design for a dynamic balancer
[17:34] <eroomde> for balacing rotating parts
[17:34] <eroomde> balancing*
[17:35] <Babs> but yes, definitely doing a test with them off and on
[17:35] <eroomde> they used them for balancing the turbine rotors, which was important at 120krpm
[17:35] <eroomde> i dug the design up for when (haha) I was going to build my hab reaction wheel
[17:35] <arko> Babs: http://www.idsc.ethz.ch/Research_DAndrea/Cube/
[17:35] <Babs> my other thought was that as the batteries are exposed, then once you get to apogee they would probably cut out due to cold anyway
[17:35] <Hix> there are some insane RC turbines out there now
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[17:35] <arko> http://www.idsc.ethz.ch/Research_DAndrea/Cubli
[17:35] <arko> and that
[17:35] <eroomde> back when i thought single digit arcseconds of pointing accuracy would be easy
[17:36] <Babs> eroomde - my rotation speed *slightly* below 120krpm
[17:37] <Hix> updated wiki with link
[17:38] <Hix> when i get credentials i will change that bit too
[17:38] <Hix> though I suspect chris may want to make it generic
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[17:38] <Babs> arko - That balancing cube is awesome. My waves lecturer at uni did something similar with 5 hinged rods that he could get to stand vertically using a servo driven sled moving back and forth.
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[17:39] <arko> oh sweet
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[17:40] <arko> run control systems problems :)
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[17:40] <Babs> hmmmm, http://www.idsc.ethz.ch/Research_DAndrea/Cubli makes my efforts look fairly amateurish
[17:40] <arko> it is ETH afterall
[17:41] <Babs> A better solution is definitely an active stabiliser rather than the passive one. However, I bet they haven't had as much fun as UK customs wondering why I am ordering very small motors and rocket igniters.
[17:41] <Babs> ;-)
[17:42] <arko> bah, you're totally on a list now
[17:42] <arko> i wonder how helpful an active stabiliser would be anyway, it's very windy and your payload tumbles everywhere
[17:43] <Hix> babs what about a spinning mass to act as a gimbal
[17:43] <Hix> like the harddrive gimbals ive seen but lighter
[17:43] <eroomde> arko: would b v useful up top
[17:43] <eroomde> a nice float at 35km
[17:43] <eroomde> taking in the night sky
[17:44] <arko> err
[17:44] <Babs> It would be magic to get a set of photos with a perfectly horizontal horizon on each one, even if the angled ones are a little more Star Trek http://www.flickr.com/photos/91049302@N00/7279516482/in/set-72157629918448066/
[17:44] <arko> yeah i would be, i meant to say how effective :P
[17:44] <arko> could the conditions be so rough that it would be difficult to stabilize?
[17:45] <Babs> eroomde - I agree. And thats the aim really of the whole project. Get it up there and then get it as stable as possible and take some quality pictures.
[17:45] <Hix> I cant remember who with but i was discussing using an IMU to control the point of fire of shutter fro level horizon purposes
[17:45] <eroomde> Babs: it's awesome
[17:45] <Babs> in reality, one of the gyros will fall off and I will get a perfect set of photos all at 35 degrees to the horizontal.
[17:45] <Babs> ;-)
[17:45] <eroomde> pleasing come to conf this year and brinbg it
[17:45] <eroomde> right btb
[17:45] <eroomde> gnite
[17:46] <Hix> bye eroomde
[17:46] <Babs> yep, will come along when a date is set
[17:46] <Babs> thanks
[17:48] <Hix> Babs, have you trested that gimbal with a kite? interesting to see how it performed before a proper launch
[17:49] <Babs> Hix - No, that would probably be a good idea. The thing I'm most concerned about is actually simply a failure of the component, so I'm putting in place some tethers just in casae
[17:49] <Babs> case
[17:49] <Hix> yup - smart move
[17:50] <Hix> what are you planning to use for imaging?
[17:50] <Babs> I did make another one and put some weights on, it failed at 35 kg so I figure I'm probably safe
[17:50] <Babs> hix - as in camera?
[17:50] <Hix> yup
[17:50] <costyn> arko: woa... that cubli is freaking cool
[17:50] <Babs> SLR, once it is tested
[17:50] <dshaw_> hey everyone. got telemetry strings and JPGs being sent to dl-fldigi correctly, but get an incorrect checksum everytime. Wasn't sure if anyone had implemented CRC16_CCITT in python. I'm using pycrc16, but it doesn't seem to work correctly
[17:50] <Hix> babs, nice. Whats your predicted launch weight?
[17:51] <Babs> It depends whether I fly the go pro - without the gopro c.2.5kg.
[17:51] <Hix> oh wow, i was expecting a lot more
[17:51] <Babs> the carbon fibre cage is 250g
[17:52] <Hix> my DLSR is 1800g with no lens or batts
[17:52] <Babs> polystyrene I haven't measured but c.500g I reckon top
[17:52] <Babs> is it an old one? my nikon was heavy but not that heavy
[17:52] <Babs> 550D is c.650g
[17:52] <Babs> ex battery
[17:52] <Hix> D2X
[17:53] <Hix> its a weapon - literally
[17:53] <arko> how i feel when i see spacenear us: http://i.imgur.com/M8xFe7C.jpg
[17:53] <jonsowman> haha
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[17:54] <willdude123> My arduino just suddenly stopped transmission.
[17:54] <jonsowman> aww
[17:54] <jonsowman> poor arko
[17:54] <Hix> oh arko search todays logs for canada / canadian found a HAB blog there
[17:54] <arko> nice!
[17:54] <mclane> lonely arko...
[17:54] <Hix> arko http://goo.gl/1sBRR
[17:55] <willdude123> That's annoying.
[17:55] <arko> woah neat, thanks Hix!
[17:55] <Hix> cool site of yours by the way
[17:55] <fsphil> the earth really is big
[17:55] <Hix> some cool projects and a sweet design
[17:55] <arko> my site?
[17:55] <Hix> yup
[17:55] <willdude123> Shoot.
[17:55] <Hix> saw it after the twitter folloew
[17:55] <arko> oh thanks man, appreciate it :)
[17:56] <Hix> nps
[17:56] <Hix> look cool
[17:56] <Hix> made me resolve to sort my shit out for mine :)
[17:56] <Hix> *looks
[17:56] <arko> yeah, i had 2 days free one day (very rare) and decided to update it
[17:56] <arko> once this hab is recovered i think i will add the other projects
[17:57] <Hix> well worth it, a nice landing [no pun] page is worth a lot
[17:57] <willdude123> Anyone know why an arduino would suddenly stop transmission>
[17:57] <willdude123> The LED is still blinking.
[17:57] <Hix> just try removing power willdude123
[17:57] <willdude123> Done.
[17:58] <willdude123> I'll try taking the habamp off.
[17:59] <willdude123> Didn't help.
[18:00] <Hix> tried resetting SDR# and the dongle?
[18:00] <Hix> assume you are still on SDR#?
[18:00] <Babs> arko, is this you doing a parachute test? http://www.habexproject.org/
[18:00] <arko> oh yeah
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[18:00] <willdude123> This is peculiar.
[18:00] <Babs> that is awesome. I remember doing a similar thing with a tissue paper hot air balloon and a hairdryer
[18:01] <willdude123> I reloaded the blink test, and the shift is well out of the USB bandwidth.
[18:01] <arko> Babs: the new camera test http://wiki.032.la/nsl/HABEX2#Parachute_Testing
[18:01] <arko> never actually did real data capture or tests sadly
[18:01] <Hix> afk
[18:01] <arko> Babs nice! always fun
[18:01] <willdude123> This is really weird now.
[18:01] <arko> even doing it just to see that parachute open
[18:03] <Babs> excellent. 10/10 for atmospheric night shot too.
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[18:03] <arko> haha, it was raining that day, very rare for los angeles sadly
[18:03] <Upu> flush your DNS arko
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[18:04] <arko> s/DNS/toilet/
[18:04] <Upu> looks like you are pointing at the old box
[18:04] <Babs> question: when people talk about "pre-deployed" parachute, are they simply meaning capsule>base cord of parachute>parachute>top loop of parachute>balloon or something more complex?
[18:04] <priyesh> Upu: that image might just be cached
[18:04] <arko> Upu: ??
[18:04] <Upu> they mean that Babs
[18:05] <Upu> true priyesh
[18:05] <Upu> ctrl + f5 it
[18:05] <priyesh> i had to hard refresh the page
[18:05] <priyesh> (a few days back)
[18:05] <Upu> should get a little dragon at the bottom left
[18:05] <arko> oh i do!
[18:05] <arko> neat
[18:05] <arko> where did that come from?
[18:05] <Babs> Thanks upu. Your tracker is working well in my test btw. Seems to find quite a few satellites (7+) despite being surrounded by the SPOT, camera, TK-102 etc.
[18:06] <priyesh> arko: spacenear.us has been moved to a beefier box
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[18:06] <arko> nice!!
[18:06] <Upu> jolly good Babs :)
[18:06] <arko> btw, you guys are always welcome to a US mirror here in Los Angeles
[18:06] <Upu> I amended the image so we knew which server it was using
[18:06] <jonsowman> (*) may contain horse
[18:07] <Babs> Need to build a new antenna as the other one now doesn't fit. How much do you reckon you lose having three radials vs. 4 radials?
[18:07] <arko> oh thats makes sense
[18:07] <Upu> three radials does work as does two
[18:07] <Upu> four are better though
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[18:09] <Babs> Cool thanks - 3 works within the confines of the capsule, 4 leaves one of the radials poking out the side. I had bad symmetry karma.
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[18:16] <gonzo_> having big asymetries could resilt in a not-quite-regular antenna pattern
[18:17] <gonzo_> 3 equidistant is better than 90deg with one missing
[18:18] <Upu> ping cuddykid going to delete Habe if thats ok
[18:18] <cuddykid> Upu: yep, no probs
[18:19] <Upu> Arko does look all lonely out there in the US on his own :) http://spacenear.us/tracker/
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[18:20] <arko> Upu did you see the picture?
[18:20] <Upu> yeah
[18:20] <arko> :P
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[18:23] <fsphil> just think, you could probably send a balloon this far arko
[18:25] <arko> http://media.tumblr.com/tumblr_m07m9trSeS1qg38m8.jpg
[18:25] <arko> as much as reddit memes annoy me, i feel this is approriate
[18:25] <fsphil> and then collect it when you're over
[18:25] <arko> dude, i will gladly drive out to pick up anything transatlantic
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[18:35] Nick change: ct3 -> ctaylor_
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[18:43] <Babs> Thanks gonzo - I'll work on that basis
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[18:44] <Babs> fsphil - someone did that once, don't know whether you saw it http://www.trackuino.org/
[18:45] <Babs> Right, I'm off. Have a good night everyone.
[18:45] <fsphil> yea the calfornia guys
[18:45] <Babs> twas impressive
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[18:45] <fsphil> very
[18:45] <fsphil> and they've done it twice
[18:45] <fsphil> although both went too far south for us
[18:45] <Babs> Hitting the Isle of Man from there would be the boss ;-)
[18:46] <fsphil> recovery would be expensive
[18:46] <fsphil> the ferry prices are madness
[18:47] <Babs> Put a tax return attached to the outside of it. That should get most of the IoM locals sending it back out of there pretty promptly.
[18:47] <fsphil> hah
[18:47] <jonsowman> lol
[18:48] <jonsowman> we've been saying for ages that we should have a reverse-predictor
[18:48] <jonsowman> you give it the desired _landing_ spot and it gives you the launch spot
[18:49] <fsphil> that would please DM. "Launch site: umm..."
[18:49] <fsphil> "somewhere over there"
[18:49] <fsphil> I might make up some disposable payloads for it
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[18:50] <fsphil> steal a few of those 100g balloons from steve
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[19:19] <Eisteddfod> Anybody available?
[19:19] <willdude123> For?
[19:20] <fsphil> I'm not currently seeing anyone
[19:20] <willdude123> Ask, and if someone knows they'll answer.
[19:20] <willdude123> :)
[19:20] <Eisteddfod> advice
[19:20] <willdude123> Ask, and if someone knows they'll answer.
[19:20] <Eisteddfod> we want to launch a High altitude project
[19:21] <Eisteddfod> have no experience with radio transmitting
[19:21] <jonsowman> Eisteddfod: where are you based?
[19:21] <Eisteddfod> Denbigh Wales
[19:21] <jonsowman> have you read the ukhas wiki?
[19:21] <fsphil> aah good old Wales, nice place
[19:22] <Eisteddfod> Yes, radio tracking sounds difficult
[19:22] <willdude123> Eisteddfod: Have you heard of radio teletype?
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[19:22] <Eisteddfod> is it something you can buy
[19:22] <willdude123> Eisteddfod: You could fly a payload with just a GSM transmitter, but the chances of recovery is significantly less.
[19:22] <willdude123> *are
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[19:23] Action: willdude123 points to Upu
[19:23] <Eisteddfod> do people still launch mobile phones and GPS separately
[19:24] <Upu> Eisteddfod the radio is actually quite easy
[19:24] <willdude123> I just made one today. :)
[19:24] <Upu> if you can make an LED blink
[19:24] <willdude123> Well, set one up.
[19:24] <Upu> you can do radio :
[19:24] <Upu> http://ukhas.org.uk/guides:linkingarduinotontx2
[19:24] <Eisteddfod> not much experinece in electronics here
[19:25] <willdude123> It's simples, meow.
[19:25] <willdude123> You need little experience.
[19:25] <willdude123> Eisteddfod: Done any programming before?
[19:26] <Eisteddfod> a bit, follow the wiki guide?
[19:26] <willdude123> Well Upu sells NTX2s which are radio modules.
[19:26] <willdude123> Eisteddfod: Do you understand RTTY?
[19:27] <Eisteddfod> Ok, so project too risky without radio contact i take it!, no prior experience with RTTY!
[19:28] <willdude123> You don't need any.
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[19:28] <Eisteddfod> ok
[19:28] <jonsowman> now's the time to learn!
[19:28] <willdude123> Radio Teletype works on the following principle.
[19:28] <Eisteddfod> lol ok,
[19:28] <M0TVU> Eveing all
[19:28] <willdude123> You have a radio module.
[19:28] <willdude123> You have an arduino
[19:29] <Eisteddfod> radio module you hav shown in your wiki?
[19:29] <willdude123> You make the radio 'jump' between 2 frequencies.
[19:29] <willdude123> And therefore can make binary data.
[19:29] <willdude123> Binary data goes to text.
[19:29] <willdude123> Eisteddfod: The NTX2, yes.
[19:30] <willdude123> They are £40, I think and they are sold by Upu.
[19:30] <Upu> NTX2 ?
[19:30] <Eisteddfod> ok, text data being...? location
[19:30] <Upu> no where near £40 :)
[19:30] <willdude123> Oh.
[19:30] <willdude123> I've never paid for one, so forgive me :P.
[19:30] <Upu> Eisteddfod UKHAS protocol
[19:30] <Upu> which is ...
[19:30] <willdude123> £20
[19:31] <M0TVU> Just off to take the payload transmitter for a walk back in a bit - hopefully i'll track something on spacenear
[19:31] <fsphil> we have to pay for the protocol now?
[19:31] <Upu> http://ukhas.org.uk/communication:protocol
[19:32] <willdude123> fsphil: I was talking about the NTX2.
[19:32] <Eisteddfod> upu thanks,
[19:32] <fsphil> I know :)
[19:32] <Eisteddfod> i have a lot to learn
[19:32] <Upu> worth it in the end though
[19:33] <Eisteddfod> for like a beginner, woud you still recommend radio transmitting?
[19:34] <fsphil> yes
[19:34] <Upu> absolutely
[19:34] <fsphil> infact it's better for a beginner to learn this
[19:36] <willdude123> Then you won't be a begginer anymore.
[19:36] <willdude123> :)
[19:36] <Eisteddfod> Will see about that! do you have a conversion chart as to how much Helium is needed for a typical balloon?
[19:36] <Upu> http://habhub.org/calc/
[19:37] <Upu> http://habhub.org/predict/ will also help
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[19:38] <Eisteddfod> Upu thanks
[19:38] <fsphil> is this a team project?
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[19:39] <Eisteddfod> it is with a secondary school
[19:40] <fsphil> nice. I wish my old school had done this sort of thing
[19:41] <Upu> are you the teacher ?
[19:41] <Eisteddfod> the pics on the internet are amazing
[19:41] <Eisteddfod> im a chem teacher, my chem is ok! programming a bit dodgy
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[19:41] <Upu> we have a number of teachers on here
[19:42] <Upu> doing launches with their classes
[19:42] <Eisteddfod> cool
[19:42] <Upu> Chemisty huh ? :)
[19:42] <Eisteddfod> yep
[19:42] <Upu> quick PM :)
[19:43] <fsphil> not suspicious at all
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[19:43] <Upu> lol
[19:43] <dshaw_> is habitat still in development (want to make sure i'm understanding the github page correctly)?
[19:43] <Upu> always in development dshaw_
[19:44] <dshaw_> Upu: good point :). should rephrase, wanting to use the habitat.utils.checksums.crc16_ccitt(data) function, but on the github it says it isn't ready for installation
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[19:47] <fsphil> should be fine
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[19:49] <Upu> dshaw_ join #habhub and ask on there
[19:49] <dshaw_> Upu: thanks for all the help Upu, appreciate it
[19:50] <Upu> nps
[19:51] <willdude123> I would try and start interfacing with the UBLOX module today, but cba.
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[19:54] <fsphil> I really want to tidy up some more, but keep getting conviently distracted by the internet
[19:55] <gb73d> http://abcnews.go.com/blogs/technology/2013/04/iowa-farmer-controls-cow-milking-with-smartphone/
[19:56] <M0TVU> Well that test was a complete failure - lol
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[19:57] <fsphil> good to get those out of the way early
[19:58] <M0TVU> The payload transmitter drifted so much dl-fldigi lost track
[19:58] <fsphil> can your radio be tuned by fldigi?
[19:59] <M0TVU> Also the array holding the data got itself in a complete mess - no idea why but after a gobbledy gook I got ....
[19:59] <M0TVU> $$M0TVU,,,,,l(.lW:Æ& ºøý$tM0TVU,,,,0,l,$,,0ܲDDD
[19:59] <M0TVU> Possibly it's an 817nd
[19:59] <fsphil> with the right cable it can yea
[19:59] <M0TVU> or the 736 take ya pick
[19:59] <M0TVU> I think I have the cable
[19:59] <fsphil> there's an option in dl-fldigi to retune the radio if the signal drifts too far
[19:59] <M0TVU> or a cable
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[20:00] <M0TVU> what worries me more is this ..... - $$M0TVU,,,,,,0,,,,,,,27,-153.773,4,-00048*DD6D
[20:00] <M0TVU> That's the array getting its knickers in a twist ....
[20:01] <M0TVU> No idea why at present
[20:01] <M0TVU> but you can't reset once you let go .....
[20:02] <fsphil> yea never good to have bugs like that
[20:02] <fsphil> the PIC probably has a watchdog timer
[20:02] <M0TVU> yeah it does
[20:02] <fsphil> as a last resort, if your code can detect the error condition
[20:02] <fsphil> or rather the opposite
[20:03] <M0TVU> I have a few error traps in place already and a track to see if all fields are correctly in place but it clearly missed that one
[20:03] <fsphil> no doubt will turn out to be something silly
[20:03] <M0TVU> trap*
[20:03] <M0TVU> You can rest assured - this i my code
[20:03] <M0TVU> is
[20:04] <M0TVU> I do silly - :-)
[20:04] <fsphil> me too, but I'm good at covering it up :)
[20:04] <M0TVU> One good thing - got the PCB done today and I think it looks great ... :-) - Double sided too
[20:06] <M0TVU> Anyway gotta go take the dog for a walk - nite all
[20:06] <fsphil> nite!
[20:07] <Eisteddfod> do you guys use gopro cameras?
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[20:08] <jonsowman> Eisteddfod: often
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[20:08] <fsphil> they're quite popular for ballooning
[20:08] <Eisteddfod> how do you extend the battery life?
[20:08] <jonsowman> there is the battery bacpac
[20:08] <jonsowman> [sic]
[20:08] <Eisteddfod> k
[20:09] <jonsowman> which extends the battery life usually enough for a HAB flight
[20:09] <Eisteddfod> how long wud that b, around 3.5 hours?
[20:10] <jonsowman> around that, maybe a tad longer
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[20:11] <Eisteddfod> ok, thanks,
[20:11] <fsphil> annoyingly expensive though
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[20:12] <jonsowman> true
[20:12] <jonsowman> they're not cheap
[20:12] <fsphil> I'd include a backup tracker or two :)
[20:12] <jonsowman> yep
[20:12] <Eisteddfod> what about the payload container, polystyrene box?
[20:12] <jonsowman> polystyrene something anyway
[20:12] <jonsowman> spheres, boxes, whatever]
[20:13] <jonsowman> Gu used to sell ice cream in a very suitably sized EPS box
[20:13] <Eisteddfod> lol, do you need to keep the battery warm?
[20:13] <jonsowman> if you're careful with insulation the electronics will usually remain warm enough
[20:14] <Eisteddfod> was reading about the tpy astronaut in space from 2010
[20:14] <fsphil> energiser ultimate batteries will still work to very low temperatures
[20:14] <fsphil> lithium
[20:15] <Eisteddfod> ok kool
[20:15] <Eisteddfod> do you normally just send up one cam? or more
[20:15] <jonsowman> whatever you like!
[20:15] <fsphil> or less :)
[20:16] <Eisteddfod> lol ok as long as it is found
[20:16] <fsphil> some flights don't have cameras - although that's silly :)
[20:16] <Eisteddfod> telemitry data i guess is fun?
[20:16] <fsphil> well that depends on what it's doing
[20:17] <fsphil> some flights, like the trans-atlantic ones recently, would have been too heavy with a camera
[20:17] <Eisteddfod> havent read about them
[20:17] <Eisteddfod> sounds cool
[20:17] <fsphil> others want minimum weight to get higher
[20:18] <Eisteddfod> break records!
[20:18] <fsphil> indeed
[20:18] <fsphil> which is currently something silly like 43.5km
[20:18] <fsphil> even more
[20:19] <fsphil> 44379m
[20:19] <Eisteddfod> with the container you need to ensure that the cam doesn't mess up the insulation right?
[20:19] <fsphil> http://ukhas.org.uk/general:uk_records
[20:19] <jiffe99> PROCEDURE
[20:19] <jiffe99> 1. Pitch tent
[20:19] <jiffe99> 2. Lay tarp
[20:19] <jiffe99> 3. Attach regulator to tank
[20:19] <jiffe99> 4. Attach tubing to regulator
[20:19] <jiffe99> 5. Attach tubing to balloon
[20:19] <jiffe99> 6. Attach equilibrium weight to balloon
[20:19] <fsphil> um
[20:19] <jiffe99> 7. Fill balloon and test equilibrium
[20:19] <jonsowman> thanks for that
[20:19] <jiffe99> whoops
[20:19] <jiffe99> must have right clicked
[20:19] <fsphil> one step at a time :)
[20:19] <fsphil> Eisteddfod: not sure what you mean?
[20:19] <Eisteddfod> lol
[20:19] <jonsowman> ban putty. ban it right now.
[20:20] <arko> 44379m
[20:20] <arko> WHHHATT
[20:20] <arko> that's crazy
[20:20] <fsphil> yea I've pasted php code in here a few times because of putty
[20:20] <jonsowman> Eisteddfod: yes you're right
[20:20] <fsphil> ain't it just
[20:20] <Eisteddfod> u said you need good insulation
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[20:20] <fsphil> good insulation for the flight computer
[20:20] <jonsowman> you don't want to go ripping a massive hole in your EPS box for the camera lens
[20:20] <fsphil> the cameras often run hot enough
[20:20] <jonsowman> make the hole just big enough so that the lens fits snugly into it
[20:20] <fsphil> ideally you'd have two compartments
[20:21] <jonsowman> yes, that is a good idea ^
[20:21] <jonsowman> arko: i know right
[20:21] <Eisteddfod> two compartments, one for cam, the rest for other stuff
[20:21] <Eisteddfod> ?
[20:21] <fsphil> yea
[20:21] <jonsowman> correct
[20:21] <fsphil> the area for the tracker should be well sealed
[20:22] <fsphil> to stop cold air flowing through it
[20:22] <Eisteddfod> u said onboard computer, for a mega beginner here! what do u mean, the processor?
[20:22] <fsphil> flight computer, fancy way of saying arduino with a gps and ntx2 :)
[20:22] <jonsowman> flight computer sounds cooler
[20:22] <fsphil> it does
[20:23] <fsphil> if I have a spare balloon at a launch, I like to write in big letters on one "FLIGHT" and the other "FLIGHT SPARE"
[20:23] <Eisteddfod> does indeed
[20:23] <fsphil> makes it look like I know what I'm doing
[20:23] <fsphil> (write on the box, not the balloon)
[20:23] <Eisteddfod> professional!
[20:24] <jonsowman> haha
[20:24] <Eisteddfod> next question sorry! which gps is recommended
[20:25] <fsphil> if you're going to be using an arduino, this one: http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=68
[20:25] <jonsowman> Eisteddfod: http://ukhas.org.uk/guides:gps_modules
[20:26] <Eisteddfod> also how do you know which balloon is suited for your payload?
[20:26] <jonsowman> Eisteddfod: many/most of your questions will be answered on the wiki
[20:26] <fsphil> have a play with the burst calculator
[20:26] <Eisteddfod> thanks jonsowman
[20:26] anerDev (~anerDev@host43-96-dynamic.17-87-r.retail.telecomitalia.it) left irc: Quit: Bye !
[20:26] <jonsowman> but by all means ask here if you want more detail or can't find what you're after
[20:26] <fsphil> http://habhub.org/calc/
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[20:28] <Eisteddfod> is there like a guide that goes 1: do..., 2... 3...! lol
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[20:30] <fsphil> the wiki is a good 1.
[20:31] <fsphil> after that it varies :)
[20:31] <Eisteddfod> kool, anyone use the habhub app
[20:32] <jiffe99> hmm, using habhub I used a launch time of 1800 UTC but when I mouseover the launch point it says 1100 UTC
[20:32] <jiffe99> habhub/predict that is
[20:33] <Eisteddfod> saw it in app store
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[20:33] <jonsowman> Eisteddfod: cuddykid's creation
[20:33] <jonsowman> jiffe99: hmmmm
[20:33] <Eisteddfod> nice one cuddykid
[20:33] <cuddykid> cheers
[20:34] <Eisteddfod> were u in the sun?
[20:34] <cuddykid> yeah
[20:34] <cuddykid> not page 3 though :)
[20:34] <Eisteddfod> claim to fame
[20:34] <Eisteddfod> lol
[20:34] <jonsowman> jiffe99: i thought i fixed that bug. anyway the time you put into the form is correct
[20:34] <jonsowman> ignore the hover text
[20:35] <jiffe99> jonsowman: cool thanks
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[20:35] <jonsowman> sorry about that, I'll investigate it again soon
[20:35] <Eisteddfod> does anyone here hold the highest altituse record?
[20:36] <fsphil> I'm in 42nd place
[20:36] <fsphil> woo
[20:36] <daveake> hah
[20:37] <Eisteddfod> 42nd out of 7 billion
[20:37] <jonsowman> MONDO is the record at the moment, he's not on IRC much (if ever?)
[20:37] <daveake> very rarely
[20:37] <fsphil> occasionally
[20:37] <fsphil> actually he's not launched recently
[20:37] <daveake> I think Steve is 2nd and I'm 3rd
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[20:37] <Eisteddfod> cool
[20:37] <jonsowman> yep
[20:37] <RocketBoy> i was robbed
[20:37] <daveake> hah
[20:37] <jonsowman> lol
[20:38] <daveake> micked not robbed
[20:38] <daveake> Rob hasn't had the record for years :)
[20:38] <Eisteddfod> do guinness recognise the records?
[20:40] <fsphil> there have been higher balloons Eisteddfod, the highest ever was done by the japanese space agency - 53km
[20:40] <fsphil> mick's is the highest amateur one
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[20:41] <Eisteddfod> ah ok kool
[20:42] <Eisteddfod> would you use hydrogen instead of helium to get the extra height
[20:43] <RocketBoy> yes
[20:43] <RocketBoy> and a very light payload
[20:44] <RocketBoy> and a big balloon
[20:44] <RocketBoy> but there is much more too it than that
[20:44] <fsphil> and lots of luck
[20:44] <Eisteddfod> cool
[20:45] <fsphil> and ideally a launch site on the equator
[20:45] <Eisteddfod> interesting
[20:46] <RocketBoy> humm there is other stuff too but I'm keeping quiet
[20:46] <Eisteddfod> lol couple of rockets
[20:46] <fsphil> also not suspicious at all
[20:46] <costyn> good lord... just been reading up on CB keydowns
[20:47] <costyn> basically decibel dragrace but then with radio on 27mhz
[20:48] <costyn> http://www.youtube.com/watch?v=tez6N006H9k <-- arcing on antenna !
[20:50] <fsphil> mad!!!
[20:50] <fsphil> glad he got it on a video
[20:50] <costyn> very
[20:50] <costyn> very redneck :)
[20:51] <costyn> fsphil: yea apparently many video cameras fail during the competition due to RF interference
[20:51] <arko> wow
[20:51] <arko> when i saw those trucks, im like
[20:51] <arko> oh god it's US
[20:52] <costyn> 'murica!
[20:52] <arko> murica
[20:52] <Maxell> *rbelrebelrebel*
[20:53] <fsphil> YEEHAW
[20:53] <fsphil> do they still say that? My info on the US may be out of date
[20:53] <arko> maybe in the south
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[20:54] <arko> we aren't all wackjobs ;)
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[20:55] <Maxell> liek this? https://www.youtube.com/watch?v=OwXGcNeI9-E
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[20:57] <Eisteddfod> how much publicity would a height of 50km create?
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[20:59] <SpeedEvil> I'm not sure you can get there with latex
[20:59] <Eisteddfod> ah ok
[20:59] <SpeedEvil> maybe filled just right, with hydrogen, and a very, very light payload
[21:00] <SpeedEvil> but doubtful
[21:00] <Eisteddfod> hypothetical quetsion, would the news cover this sort of achievement?
[21:00] <Eisteddfod> it sounds exciting
[21:00] <SpeedEvil> sure
[21:00] <arko> Maxell: thats the south
[21:00] <arko> we dont talk about them much
[21:00] <SpeedEvil> but the difference between 43km and 50 isn't very newsworthy
[21:00] <Eisteddfod> i know what you mean
[21:00] <Eisteddfod> but say if you had a bunch of school kids
[21:01] <SpeedEvil> it's illegal to launch them to 50km, without a lot of paperwork
[21:01] <Eisteddfod> ok
[21:02] <Eisteddfod> what arethe other challenges with high altitude ballooning apart from hight
[21:02] <Eisteddfod> duration?
[21:02] <willdude123> Distance.
[21:03] <Eisteddfod> cool, is there a current record?
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[21:05] <x-f> amateur record is from California to Morocco
[21:05] <willdude123> 6000 miles or so.
[21:05] <Eisteddfod> that sounds impossible to beat!
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[21:06] <willdude123> There are more records on arhab.org
[21:07] <Eisteddfod> thanks willdude123
[21:07] <Eisteddfod> any personal records willdude123?
[21:08] <fsphil> not impossible to beat that, just difficult
[21:08] <willdude123> Nope.
[21:08] <Eisteddfod> cali to morocco is nuts!
[21:08] <willdude123> Never flown an HAB.
[21:08] <mattbrejza> tbh their second attempt got close to their first record
[21:09] <mattbrejza> just need to wait for stronger winds
[21:09] <willdude123> Eisteddfod: My parents won't let me.
[21:10] <Eisteddfod> willdude123 ask them to take you to a planned one?
[21:10] <Eisteddfod> launched by hesas
[21:10] <willdude123> I'd prefer to do the tracking myself.
[21:11] <willdude123> And building the payload.
[21:11] <Eisteddfod> cant imagine the stress - imagine if it landed in the ocean
[21:11] <Eisteddfod> we are close to the irish sea!
[21:11] <willdude123> They have before.
[21:12] <Eisteddfod> nice if u have a boat handy
[21:12] <fsphil> nothing in the irish sea so far, but plenty on the north sea and channel
[21:12] <fsphil> the winds tend to blow east, so you're actually in a great spot Eisteddfod
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[21:14] <Eisteddfod> would you launch from Lleyn Peninsula? too risky?
[21:15] <fsphil> yea
[21:15] <fsphil> risky
[21:15] <Eisteddfod> nice view from cam!
[21:15] <fsphil> sea, national park
[21:15] <fsphil> either one is bad on its own
[21:16] <fsphil> but yes the view would be amazing
[21:17] <fsphil> you'd be safer launching in the park
[21:17] <fsphil> landing to the east of it
[21:17] <fsphil> or south east
[21:18] <Eisteddfod> kool
[21:18] <Eisteddfod> llanberis
[21:19] <fsphil> ever open google, and forget what you wanted to search for?
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[21:26] <daveake> No, but sometimes I start a reply, and then
[21:26] <daveake> erm, what was I saying?
[21:27] <fsphil> you where... wait, who are you?
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[21:27] <fsphil> hello!
[21:28] <daveake> hello!
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[21:28] <Eisteddfod> hello
[21:28] <x-f> hello
[21:30] <Geoff-G8DHE> Craag> you asked the other day if I was using SDR-Radio and multi VFO's, sry I got distracted, yes, I am seems to work well indeed.
[21:31] <arko> http://i.minus.com/iXL64EfdJe6w5.gif
[21:31] <craag> Geoff-G8DHE: Cool, thanks.
[21:31] <mfa298> I had a go at that the other day as well and it seemed to work well.
[21:32] <mfa298> although we're going to start wanting flights within a narrow band (especially for the FCD+ users)
[21:32] <craag> :)
[21:32] <Geoff-G8DHE> Biggest problem is in tracking drifting Tx, but having now found out how to change in 10Hz or even 1Hz steps its much easier
[21:32] <chrisstubbs> arko, mind: blown. Have you made any plans for your recovery mission yet?
[21:33] <craag> I notice steve has some nice and close frequencies for sunday.
[21:33] <arko> yes, we are going next weekend on a hike
[21:33] <arko> very long hike
[21:33] <arko> with a search and rescue team
[21:33] <arko> how was your hab chrisstubbs>
[21:33] <arko> ?
[21:33] <fsphil> the perfect guys for the job
[21:33] <arko> pictures yet?
[21:33] <arko> fsphil indeed
[21:33] <SpeedEvil> random question
[21:34] <SpeedEvil> the TV ADR things
[21:34] <chrisstubbs> arko it wasnt mine, i went out to recover cuddykids as it landed nearby
[21:34] <SpeedEvil> SDR
[21:34] <chrisstubbs> my hab is on the 13th
[21:34] <arko> oh nice!
[21:34] <arko> did he get his images back? :P
[21:34] <SpeedEvil> has anyone investigated GPS, or caesium locking true timebase?
[21:34] <SpeedEvil> the
[21:34] <chrisstubbs> i sent him a few, and posted the cameras and tracker back to him today
[21:35] <ttkg> Is there a way that I can make the NTX2 transmit more efficiently so I stop getting errors in my strings in dl-fldigi?
[21:35] <arko> nice
[21:35] <chrisstubbs> ttkg are you using 50 baud?
[21:35] <arko> glad to hear it was sucessful
[21:35] <fsphil> ttkg: your rtty timing might be off
[21:36] <fsphil> or fldigi might be be configured correctly
[21:36] <ttkg> chrisstubs: 300 baud
[21:36] <chrisstubbs> yeah the antenna got a little smashed up due to a bad launch so the tx was pretty weak. but he had a backup gsm tracker
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[21:36] <chrisstubbs> and a few people were getting strings
[21:36] <Geoff-G8DHE> <ttkg> just as likely to be noise on the receive path as problems in the Tx, interference and general radio noise
[21:37] <chrisstubbs> are you using SSDV or anything fancy?
[21:37] <ttkg> yeah I'm using SSDV to decode 320x240 pictures
[21:37] <Lunar_Lander> hello
[21:37] <chrisstubbs> ok cool so you probably do need the 300 baud
[21:37] <Lunar_Lander> XD thanks for the reaction up there
[21:38] <fsphil> ttkg: how are you producing the rtty signal?
[21:38] <fsphil> also, make sure you're using 2 stop bits
[21:38] <fsphil> fldigi doesn't work as well with 1 stop bit, and higher baud rates
[21:38] <ttkg> fsphil: pyserial with 2 stop bits
[21:39] <fsphil> hmm well that should be fine
[21:39] <chrisstubbs> evening lunar
[21:39] <fsphil> how does the signal look on the waterfall?
[21:39] <ttkg> it works correctly about 75% of the time
[21:39] <ttkg> the signal looks fine in the waterfall
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[21:40] <fsphil> what receiver?
[21:40] <ttkg> rtl2832u
[21:41] <craag> The receiver might be overloaded, do you an antenna plugged into the rtl2832?
[21:41] <Eisteddfod> thanks for your help tonight, really good first time here!
[21:41] <Lunar_Lander> COOL
[21:41] <fsphil> one thing I keep doing accidently with an SDR is setup dl-fldigi to record from the mic. it kinda works :)
[21:41] <ttkg> yeah it's the stock one. I'm building another one for launch but I think the one I'm using now should be fine when I'm just trouble shooting
[21:41] <Lunar_Lander> Eisteddfod, you're welcome
[21:41] <craag> If so, try unplugging it. It should still receive it fine from a few metres away at least.
[21:41] <Lunar_Lander> and to say it
[21:42] <fsphil> Eisteddfod: they're a good bunch here :)
[21:42] <Lunar_Lander> these people made me fly my balloon after five years of work
[21:42] <Lunar_Lander> so that is good
[21:42] <fsphil> ttkg: craag: or disconnect the antenna on the ntx2
[21:42] <Eisteddfod> very impressed, got to say, bet together you could break 55km barrier
[21:42] <fsphil> rockets!
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[21:43] Nick change: cuddykid_ -> cuddykid
[21:43] <fsphil> the size of the balloon needed for 55km is shocking :)
[21:44] <Eisteddfod> like size of a hot air balloon?
[21:44] <fsphil> bigger
[21:45] <fsphil> I dunno what the sums are
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[21:45] <Eisteddfod> that size legal?
[21:45] <fsphil> probably not
[21:46] <Eisteddfod> what if you heated the hydrogen gently on the way up llol
[21:47] <arko> http://marsairplane.larc.nasa.gov/graphics/balloon_launch.jpg
[21:47] <arko> big and expensive
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[21:47] <fsphil> would still need to be a physically large balloon
[21:47] <Eisteddfod> pic is similar to felix guy
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[21:51] <Lunar_Lander> what I wanted to ask
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[21:52] <Lunar_Lander> do we have some performance experiences with the ublox chip antenna?
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[21:52] <fsphil> seems to work well
[21:52] <Lunar_Lander> sounds good
[21:52] <fsphil> I've only used it the once
[21:52] <fsphil> but it did get a lock indoors here
[21:52] <Lunar_Lander> maybe using that if I build the lake constance payload
[21:52] <Lunar_Lander> yea
[21:53] <craag> No problem getting a lock indoors with it here.
[21:53] <chrisstubbs> yes it is surprisingly good
[21:53] <Lunar_Lander> cool
[21:53] <Lunar_Lander> thanks
[21:56] <Lunar_Lander> that sounds good
[21:56] <mattbrejza> anyone have a figure for what sort of image rejection you should achieve on a transmitter (dont feel like looking thru any documents right now)
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[22:06] <Lunar_Lander> mattbrejza, how do you mean?
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[22:07] <mattbrejza> the answer is -36dBm/100kHz apparently
[22:08] <Lunar_Lander> ah
[22:09] <fsphil> makes sense
[22:09] <fsphil> (not really)
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[22:29] <chrisstubbs> just added soldering iron + inverter to the launch checklist. im taking "be prepard" to the extreme
[22:30] <chrisstubbs> *prepared
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[22:30] <arko> btw, i have a pretty extensive checklist of things to pack
[22:31] <chrisstubbs> ah yeah your launch "manual" was pretty extensive
[22:31] <chrisstubbs> do you have the link? :)
[22:31] <arko> http://wiki.032.la/images/HABEX_Packing_List_BETA.pdf
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[22:31] <chrisstubbs> awesome, thanks :)
[22:32] <arko> http://wiki.032.la/nsl/HABEX2_Checklist_Before_Launch_BETA.pdf
[22:32] <arko> err
[22:32] <arko> http://wiki.032.la/images/File:HABEX2_Checklist_Before_Launch_BETA.pdf
[22:32] <arko> abhahhfiljas;dlkfjas;dfljk;4
[22:32] <arko> i meant this
[22:32] <arko> http://wiki.032.la/images/HABEX2_Checklist_Before_Launch_BETA.pdf
[22:32] <arko> and the first link too
[22:32] <arko> np
[22:32] <arko> check list was payload prep, the first link is things to pack
[22:33] <chrisstubbs> need to go buy some more SMA crimps for the yagi. £2.59 each is crazy
[22:34] <arko> ouch
[22:35] <chrisstubbs> i have a load of evernote docs with checklists, will have a read through yours now :)
[22:35] <griffonbot> @sighmon: blowing up the #projecthorus balloon at hackadl for @makerfaireadl @ Hackerspace Adelaide http://t.co/od4Q1sCfFT [http://twitter.com/sighmon/status/320303805021442049]
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[22:38] <chrisstubbs> what was the stopwatch for?
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[22:38] <chrisstubbs> balloon flight time, or helium timer?
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[22:40] <arko> helium timer
[22:40] <arko> but we didnt use it
[22:40] <arko> :P
[22:41] <chrisstubbs> ah fair enough
[22:41] <chrisstubbs> my fishing scales only look accurate to the kilo
[22:41] <chrisstubbs> think i will use a milk bottle with some water to measure neck lift
[22:41] <chrisstubbs> payload is light (500g total)
[22:41] <arko> we used the helium tank
[22:41] <arko> haha
[22:42] <chrisstubbs> i need 1.8 m3 and the small tank was 1.8m3. but i went for a bigger tank in case it is underfilled
[22:42] <chrisstubbs> where we are launching from it would be better to have a short flight than long
[22:42] <arko> http://www.flickr.com/photos/arkorobotics/8612491956/in/set-72157633147095080
[22:43] <chrisstubbs> http://hourly.chris-stubbs.co.uk/1/
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[22:43] <arko> thats a lot of water
[22:43] <chrisstubbs> is that yellow thing digital scales
[22:44] <chrisstubbs> i know :/
[22:44] <arko> yeah it is
[22:44] <chrisstubbs> if it gets to the end of our helium hire period and we havent had a launch window, we will try the CUSF launch site :)
[22:45] <arko> heh just make sure the machine running the hourly is on utc time
[22:45] <arko> i made the mistake of setting it to pd
[22:45] <arko> pdt
[22:45] <arko> and had shifted time data
[22:45] <fsphil> timezones suck
[22:45] <arko> indeed
[22:46] <Randomskk> timezones suck so much
[22:46] <arko> lets all just adopt PST :P
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[22:49] <Lunar_Lander> XD
[22:49] <Randomskk> UTC, please :P
[22:50] <arko> lets just have timezones
[22:50] <arko> :P
[22:50] <eroomde> julian date
[22:54] <willdude123> christubbs How's the arm going?
[22:54] <willdude123> :-P
[22:54] <griffonbot> @kristinalford: RT @sighmon: blowing up the #projecthorus balloon at hackadl for @makerfaireadl @ Hackerspace Adelaide http://t.co/od4Q1sCfFT [http://twitter.com/kristinalford/status/320308485550116865]
[22:54] <arko> eroomde: trolll
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[22:55] <eroomde> hey its what we used for mars lander stuff
[22:55] <eroomde> all the atmospheric entry conditions were referenced in julian date
[22:55] <chrisstubbs> Guys, time is only relative
[22:55] <chrisstubbs> :P
[22:56] <chrisstubbs> the arm is ok. i was going to work on the web interface last night but got caught up ;)
[22:56] <chrisstubbs> im off now, got a bad feeling there is football practice in our launch field on a saturday morning, so need to get up eary and go check it out tommorow
[22:56] <chrisstubbs> nght guys
[22:58] <fsphil> nite
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[22:59] <arko> eroomde: yeah, i think a lot of the trajectory calcs are done with JDT
[22:59] <arko> JDN*
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[00:00] --- Sat Apr 6 2013