highaltitude.log.20120406

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[00:43] <schofieldau> Lunar_Lander: damn it your link just sent me on a massive wikipedia tangent
[00:43] <fsphil-laptop> love those
[00:43] <fsphil-laptop> unless I'm at work
[00:44] <schofieldau> I'm now reading about "Scorched earth policy" and know far too much about chemical warfare agents
[00:44] <fsphil-laptop> and suppose to be fixing a database, and end up reading about giraffes
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[00:44] <schofieldau> https://xkcd.com/214/
[00:44] <Lunar_Lander> ohh
[00:44] <Lunar_Lander> you mean the one about the new danger sign?
[00:44] <schofieldau> yep
[00:45] <Darkside> lool
[00:45] <Lunar_Lander> ah
[00:45] <Lunar_Lander> XD WET TSHIRT CONTEST
[00:48] <schofieldau> 24-hour analog dial
[00:48] <schofieldau> "It was a bright cold day in April, and the clocks were striking thirteen.
[00:49] <Lunar_Lander> ohh I remember that line
[00:49] <Lunar_Lander> Charles Dickens?
[00:50] <schofieldau> Orwell
[00:50] <schofieldau> 1984
[00:50] <Darkside> derp
[00:50] <Darkside> schofieldau: i think we're doing a launch next weekend
[00:50] <Darkside> we may have a seat free if you'r eintereted
[00:51] <schofieldau> :D
[00:51] <schofieldau> yep of course I'm interested
[00:51] <Darkside> :P
[00:51] <Darkside> well i'll let you know
[00:51] <Darkside> it depends on how many chase cars we have
[00:51] <schofieldau> thanks :)
[00:52] <Lunar_Lander> oh yeah schofieldau
[00:54] <schofieldau> speaking of cars, I'd best buy one soon. almost have my Ps
[00:55] <Lunar_Lander> btw because of the incident there in Brazil
[00:55] <Lunar_Lander> "Doch nun häufen sich Berichte aus anderen Städten über Zwischenfälle mit radiologischen Geräten: In Belo Horizonte schnitt ein Mechaniker versehentlich eine Cäsium-Kapsel mit der Säge auf. In Santos warf eine Krankenschwester einen Zylinder mit 30 Milligramm Radium in den Müll - Chefarzt Oskar von Pfuhl mußte mit dem Geigerzähler in der Hand die Müllhalde der Stadt absuchen."
[00:56] <Lunar_Lander> "But now there are more and more reports from other cities about incidents with radiological machines: In Belo Horizonte, a mechanic cut open a caesium capsule using a saw. In Santos, a nurse dumped a cylinder carrying 30 millgrams of radium into the trash. Head physician Oskar von Pfuhl had to search the city dump with a geiger counter."
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[00:59] <schofieldau> so I'd probably better get out of bed and make some breakfast :P brb
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[01:38] <griffonbot> @LVL1WhiteStar: Mission Control simulations 1B2 and 1B3 this weekend! Watch us, on ustream we're whitestarballoon #UKHAS #ARHAB [http://twitter.com/LVL1WhiteStar/status/188078115170422784]
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[01:55] <natrium42> hard core @ mission control simulations
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[03:42] <schofieldau> tidied up github repo
[03:42] <schofieldau> https://github.com/ajhutton/TinyTracker/
[03:42] <schofieldau> also new code
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[06:06] <navrac> yawn
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[06:32] <SamSilver_> java time
[06:33] <natrium42> ouch
[06:37] <SamSilver_> Kenyan mocha java
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[06:47] <eroomde> moaning
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[06:52] <Laurenceb_> too much information
[06:55] <schofieldau> hey all
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[07:48] <fsphil-laptop> morning already
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[08:00] <Upu> it is
[08:00] <Upu> morning
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[08:10] <GW8RAK> Morning Upu
[08:11] <Upu> morning
[08:11] <GW8RAK> Bank holiday weather by the looks of it
[08:11] <Upu> yeah business as usual
[08:11] <fsphil-laptop> cloudy there too?
[08:11] <Upu> they should move bank holidays to June
[08:11] <GW8RAK> Crap and getting darker
[08:11] <fsphil-laptop> I've not looked outside yet
[08:11] <GW8RAK> Listening to the VK and ZL stations on 20m
[08:12] <GW8RAK> But finally got Microsoft Business Contact Manager to install :)
[08:14] <GW8RAK> Now got to reboot :(
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[08:14] <number10> morning
[08:16] <Upu> hmm looks like my USB to serial is broken
[08:16] <Upu> dang
[08:20] <number10> have you got a spare?
[08:25] <Upu> no but I just made this :
[08:25] <Upu> sec
[08:25] <Upu> http://i.imgur.com/jLFgH.jpg
[08:25] <Upu> its a prototype board for using directly with an Arduino
[08:26] <Upu> but I put some headers on so I could use it as a test board
[08:26] <Upu> just need to go into work to get an Arduino
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[08:28] <number10> youve beeb busy
[08:28] <number10> n
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[08:29] <Upu> did them all last month
[08:30] <Upu> just not got round to sorting it out
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[08:38] <number10> I made a payload box quicly yesterday - too small I think - there was some of that blue high density foam at work
[08:38] <number10> was 50mm so Icut to 25mm
[08:38] <number10> Upu: where did you get your blue foam?
[08:39] <Upu> handleys ?
[08:39] <Upu> check material on ukhas wiki
[08:39] <number10> ta
[08:40] <Upu> http://www.hindleys.com/catalog/product_info.php?cPath=7_57_60_292&products_id=9635/
[08:42] <number10> cheers
[08:46] <Morseman> Thanks for that link Upu not come across them before!
[08:48] <number10> me neither - I checked loacal builders merchant yesterday morning - they just seemed to have the thick stuff.
[08:48] <Upu> if you find some of that 12.5mm thick let me know
[08:48] <Upu> thats 25mm
[08:48] <number10> mind you from the wiki it looks like Dow do the styrofoam in pink as well as blue!
[08:49] <number10> ok, will do - going to builders murchants tomorrow
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[08:54] <GW8RAK> Having a clear out. Does anyone want a Howes DC rx for 80m?
[08:55] <GW8RAK> It's in a box, and just needs the audio amp.
[08:58] Action: fsphil resists
[09:00] <number10> Upu, this place does some 10 and 15mm but you have to by £50 http://shop.panelsystems.co.uk/craftfoam/modelling-foam/craft-foam-blue.html
[09:00] <Upu> interesting thx for link
[09:00] <fsphil> the stuff I use is for underfloor insulation, no idea what it's called
[09:00] <fsphil> but it's a really good insulator
[09:01] <number10> how thick is it fsphil
[09:01] <fsphil> didn't measure it, but guessing about 15cm
[09:01] <fsphil> I carved out areas in it for each component
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[09:37] <mfa298>
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[10:09] <daveake> number10 / fsphil / Upu This stuff any use? http://www.ebay.co.uk/itm/Underfloor-Heating-Insulation-Boards-10mm-Special-Offer-/390324620697?pt=UK_Home_Garden_Hearing_Cooling_Air&hash=item5ae1290d99#ht_3587wt_1396
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[10:10] <Lunar_Lander> hello
[10:10] <Lunar_Lander> do we have imminent launches?
[10:10] <number10> daveake: for spacing betwwen componts I think
[10:11] <number10> yes
[10:11] <number10> I just need to get some 25mm for outer
[10:11] <griffonbot> Received email: Adrian Hicks "Re: [UKHAS] Globalstar? (And ADS-B)"
[10:11] <daveake> Can't see thicker than 10mm on there
[10:12] <Lunar_Lander> number10, who's launching?
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[10:13] <number10> dont think anything is imminent Lunar_Lander
[10:14] <Lunar_Lander> ah
[10:14] <Lunar_Lander> thanks
[10:14] <number10> not today anyway
[10:14] <daveake> Ozzie on Sunday I think
[10:15] <Lunar_Lander> ah
[10:15] <daveake> I still want to make a payload shaped like an Apollo command module :)
[10:15] <Lunar_Lander> yay
[10:16] <daveake> Possibly with 3 parachutes :)
[10:16] <Lunar_Lander> yay 2!
[10:17] <oh7lzb> and land it in the sea!
[10:18] <Lunar_Lander> XD
[10:18] <x-f> hah :)
[10:18] <Lunar_Lander> will get some sleep
[10:18] <Lunar_Lander> later maybe :)
[10:18] <number10> with up facing movie camera
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[10:19] <daveake> Definitely want to do the up-facing video soon
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[10:45] <Upu> that would be cool daveake :)
[10:45] <Upu> I have the Haynes Apollo 11 manual here :)
[10:46] <Upu> now thats interesting about those insulation boards, one of my customers do underfloor heating
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[10:50] <daveake> Upu bluk buy ;)
[10:50] <daveake> bulk even
[10:50] Action: daveake pushes number10 away from his keyboard
[10:51] <daveake> Julie bought me the Apollo and Space Shuttle Haynes manuals for my b'day :)
[10:51] <Upu> lol cba going to the post office with a sheet of that stuff :)
[10:51] <number10> lol
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[10:54] <daveake> Right, off out doing bank-hol things.
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[10:59] <F5MVO> hello all
[10:59] <Upu> morning F5MVO
[11:00] <F5MVO> Upu, hello , do you know how to plot different trajectory at different time and day with CUSF on the same map ?
[11:01] <Upu> you need the hourly predictor
[11:01] <Upu> http://hourly.upuaut.net
[11:01] <Upu> click a point
[11:01] <Upu> but it takes some setting up, if you give me your launch co-ordicnates and burst altitude and rates of ascent/decent I'll set that up for you
[11:02] <Upu> I just have to go walk to the dog but PM the details and I'll set itup when I get back
[11:02] <F5MVO> ok, its special procedure ?
[11:02] <Upu> yep :)
[11:02] <Upu> back soon
[11:02] <F5MVO> ok bye
[11:03] <cuddykid> ping WillDuckworth
[11:05] <cuddykid> end of next week is shaping up for a potential altitude record challenging flight :P
[11:07] <griffonbot> Received email: "Re: [UKHAS] Globalstar? (And ADS-B)"
[11:12] <cuddykid> ping RocketBoy
[11:13] <RocketBoy> yo
[11:13] <cuddykid> hiya :) just checking - do you have any Hwoyee 1600s in stock?
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[11:13] <cuddykid> says due in a few days and that was a week ago :D
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[11:16] <RocketBoy> strange - co I distinctly remember putting that notice up sometime diring the week
[11:17] <RocketBoy> well anyways the 1600s are out of stock till more come in - probably next week
[11:17] <cuddykid> ok, no probs :D
[11:17] Action: schofieldau pokes Darkside
[11:17] <cuddykid> I'll probably put an order for 1200 soon
[11:17] <schofieldau> just emailed the radio guy and apparently it won't do SSB :(
[11:18] <cuddykid> RocketBoy: you don't have anything larger than 1200 at all in stock do you?
[11:19] <RocketBoy> that is correct
[11:19] <RocketBoy> probably till next week
[11:20] <RocketBoy> when I will have H1600
[11:20] <cuddykid> no worries, I guess 1200 should suffice for an altitude attempt with ~100g payload
[11:21] <RocketBoy> don't know what happened to the totex order - have to chase when I have a spare min
[11:23] <RocketBoy> the actual position is we have had 3 early bursts with the last 3 flights of 1600g balloons from that batch - so I withdrew the rest from sal midweek
[11:23] <RocketBoy> sale
[11:23] <Darkside> schofieldau: oh damn
[11:23] <RocketBoy> so if you want a 1600 and are prepared to risk it then you can have one
[11:23] <cuddykid> RocketBoy: good idea, no thanks :P haha
[11:25] <Darkside> schofieldau: you will need a sideband receiver to be able to test the radio
[11:27] <SpeedEvil> Argh - stupid autojoin lists.
[11:33] Action: schofieldau pokes Darkside
[11:34] <schofieldau> whoops
[11:34] <schofieldau> that wasn't intentional. pressed up
[11:35] <Darkside> pff
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[12:03] <SamSilver> afk
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[12:06] <cuddykid> spam warning..
[12:09] <cuddykid> so annoying this APM2 GPS doesn't work above 18km
[12:11] <cuddykid> the cocom limits really are silly, if someone was capable enough to build a intercontinental missile then they would be able to create their own GPS
[12:11] <cuddykid> or some other dead reckoning guidance system
[12:16] <Morseman> Oops
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[12:27] <cuddykid> found a neat way of storing altitude in 2 eeprom addresses:
[12:27] <cuddykid> int a = value/256
[12:27] <cuddykid> int b = value % 256
[12:28] <cuddykid> should be fine for ints up to 65000 odd
[12:28] <Darkside> uhm
[12:28] <Darkside> thats the norml way of doing it
[12:29] <SpeedEvil> :)
[12:29] <cuddykid> lol
[12:29] <Darkside> though i use bitshifts
[12:29] <Darkside> but its the same thing
[12:41] <Laurenceb> int16_t
[12:41] <DanielRichman> might produce some interesting altitudes when you go above 32.7k
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[12:46] <SpeedEvil> Probably sane to add a kilometer - to cope with the GPS being wacky and producing bogus alts, then to 16 bit unsigned
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[13:08] <ooda55> Hi guys!
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[13:44] <cuddykid> apparently someone was in the metro this week for a balloon launch
[13:47] <Laurenceb> their balloon wouldnt launch very high in a tunnel
[13:47] <cuddykid> hohohoo
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[14:01] <jdtanner> Afternoonn chaps.
[14:05] <jdtanner> I could do with a bit of advice about setting up a radio tracker for use in our up coming launch; I'm quite happy with technology, but a bit of a noob when it comes to electronics. Is there an idiots guide to setting up a balloon borne tracker out there, or does anyone have a tracker premade they'd be happy to sell/loan to us?
[14:06] <Darkside> what country
[14:06] <jdtanner> Ideally I'd like to make my own...but I will probably need my hand holidng through the whole process...
[14:06] <jdtanner> @Darkside the UK
[14:06] <Darkside> k
[14:06] <Darkside> well the ukhas site has a lot of info
[14:07] <Darkside> and a lot of the people in this channel can probably help out
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[14:07] <jdtanner> Yes, I've trawled the site and think i know what kit I need, but info on putting it together and getting it up and running seems to be a bit thin on the ground :)
[14:08] <Darkside> rite of passage :-)
[14:08] <jdtanner> Yes, seems to be :) We are currently relying on a GSM tracker to find our first launch
[14:08] <Darkside> bad bad bad idea
[14:08] <jdtanner> Yes, which is why I'm wanting to pursue the radio tracker :)
[14:08] <Darkside> if you build a tracker that conforms to the standards ukhas uses, you'll have many people available to help you track
[14:08] <daveake> good choice :)
[14:09] <jdtanner> That also :)
[14:09] <jdtanner> The problem is that whilst we've got a squillion science degrees between us, electronics experience is firmly at GCSE level! :P
[14:10] <fsphil> it's a good learning experience
[14:10] <fsphil> you can put all the parts on breadboard for testing so it's pretty easy
[14:11] <jdtanner> Yes, definitely. I guess I just need a couple of hints as to what to buy..."a shopping list" so to speak...then some very patient people prepared to talk a numpty through the process of getting it up and running :D
[14:12] <jdtanner> All we want on the first go is the ability to track location and altitude, nothing fancy.
[14:13] <jdtanner> Then, if that works...move onto including other sensors.
[14:13] <fsphil> the simplest way is probably an arduino, gps and radio modules
[14:14] <jdtanner> Ok, any recommendations as to the best gps and radio module (I know there are a few mentioned on the UKHAS wiki) but "from the horses mouth" would be useful.
[14:14] <fsphil> http://ukhas.org.uk/guides:linkingarduinotontx2
[14:14] <Darkside> jdtanner: for radio module, NTX2
[14:14] <fsphil> the ukhas wiki is about as close to a horse as you'd want to get :)
[14:14] <Darkside> for GPS, ublox modules
[14:15] <Darkside> and Upu has a store with breakout boards for them
[14:16] <jdtanner> a wiki horse :: Thanks for the links. Sorry if it is obvious, but what is Upu?
[14:16] <Darkside> Upu is a person :P
[14:16] <Darkside> fsphil: got a link to the webstore?
[14:16] <fsphil> and he has as store: http://ava.upuaut.net/store/
[14:17] <fsphil> but no plan
[14:17] <daveake> A question often asked but never really answered ... :p
[14:17] <jonsowman> lol
[14:17] <Darkside> fsphil: upu is a cylon?
[14:17] <UpuWork> haha
[14:17] <UpuWork> "what is Upu"
[14:17] <UpuWork> good question
[14:17] <Darkside> jdtanner: http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=51
[14:18] <Darkside> theres a gps breakout
[14:18] <fsphil> Darkside, well the cylons pretended to have a plan at least
[14:18] <Darkside> until they got all sentimental and shit
[14:19] <Darkside> also the end of that series was pretty cool
[14:19] <jdtanner> Cheers chaps, I've got a lot to learn obviously :/
[14:19] <fsphil> it started great, the middle bit was meh, and the end was quite good
[14:20] <Darkside> i'm watching B5 atm :P
[14:20] <Darkside> last ep of season 2
[14:21] <schofieldau> jdtanner: I started off with barely any electronics experience about a month ago
[14:21] <schofieldau> and I have an almost functioning tracker :)
[14:21] <Darkside> schofieldau: needs testing :P
[14:21] <Darkside> you need a radio
[14:22] <jdtanner> Great! Well done...what choices did you make?
[14:22] <Darkside> jdtanner: same as eeryone else
[14:22] <Darkside> :P
[14:22] <schofieldau> Darkside: yup. /almost/ working :P
[14:22] <Darkside> i know, i supplied the GPS :P
[14:23] <schofieldau> jdtanner: I got myself an arduino pro mini
[14:23] <jdtanner> ok...writing this all down :)
[14:23] <Darkside> jdtanner: the key point is that the NTX2 and the uBlox GPS modules operate off 3.3v logic levels
[14:24] <Darkside> so your microcontroller needs to use 3.3v levels too, or you kill your peripherals
[14:24] <jdtanner> ok
[14:24] <Darkside> theres 2 models of the arduino pro mini - a 3.3v and a 5v version
[14:24] <Darkside> you'll want the 3.3v version
[14:24] <jdtanner> brill
[14:24] <Darkside> unlike the normal arduino boards, the pro mini's don't have a built in usb to serial device
[14:25] <Darkside> so, to program them, you need a separate usb to serial adaptor
[14:25] <jdtanner> Is that just a standard USB to Serial? I've got a Keyspan one
[14:25] <schofieldau> yup
[14:25] <Darkside> there are many FTDI usb to serial boards available, not all are pin-compatible with the usb pro mini
[14:25] <schofieldau> although
[14:25] <Darkside> uhh
[14:25] <schofieldau> it needs to be 3.3v
[14:25] <Darkside> not really
[14:25] <fsphil> usb to 3.3v ttl serial
[14:25] <Darkside> theres serial and serial
[14:25] <Darkside> yes
[14:25] <Darkside> 'serial' can mean many things
[14:26] <Darkside> there are different voltage levels - RS232 uses positive and negative voltages
[14:26] <Darkside> the arduino pro mini uses 3.3v TTL levels. That means 0V and 3.3v
[14:26] <schofieldau> https://www.sparkfun.com/products/9873
[14:26] <jdtanner> ah, so maybe it is better to pick a different board with a usb interface?
[14:27] <Darkside> yes
[14:27] <Darkside> the one schofieldau just linked is good
[14:27] <fsphil> I have that sparkfun one
[14:27] <Darkside> thers probably a local distributor
[14:27] <schofieldau> http://www.ebay.com/itm/Arduino-Pro-Mini-3-3V-8MHz-MEGA328P-FTDI-Basic-Breakout-Breakaway-pin-Kit-/220924291039?pt=LH_DefaultDomain_0&hash=item33701d27df#ht_1938wt_1185
[14:27] <schofieldau> that's what I bought
[14:28] <schofieldau> also, that FTDI is handy because there's a jumper to select 3.3v or 5v
[14:29] <jdtanner> ok, I'm just about keeping up :)
[14:30] <jdtanner> So that ebay link is the microcontroller plus usb interface; that then needs a gps module and a rf module?
[14:30] <Darkside> oh thats nice
[14:30] <fsphil> that is nice
[14:30] <Darkside> yeah, that ebay link +gps + rf module + some resistors
[14:30] <Darkside> and a payload box and antenna
[14:30] <Darkside> and you have a basic payload
[14:31] <schofieldau> jdtanner: as far as actually building it, you'll probably want a breadboard
[14:31] <jdtanner> got everything but the micrcontroller + gps module + rf module
[14:31] <jdtanner> Ok, any suggestions? I might have one, but as I live in the backside of nowehre, I can't get to a Maplins :P
[14:32] <schofieldau> well, that is for prototyping
[14:32] <schofieldau> to assemble it for the actual flight you'll want something more premenant like perfboard
[14:32] <Darkside> jdtanner: you work at a uni?
[14:32] <schofieldau> also this is just me spitting out exactly what darkside told me a month ago :P
[14:32] <schofieldau> so credit to him
[14:32] <Darkside> heh
[14:32] <jdtanner> Nope, I work for the Peak District National Park Authority :)
[14:32] <Darkside> ahh
[14:33] <jdtanner> Cheers to you both!!! :D
[14:33] <number10> any jobs going there jdtanner :)
[14:33] <jdtanner> haha...depends if you help me out :P
[14:33] <jdtanner> Seriiously, we are recruiting casual staff at the mo'
[14:33] <number10> you can have a ready made tracker :D
[14:34] <daveake> lol
[14:34] <jdtanner> haha! nothing like bribery
[14:34] <schofieldau> that ruins all the fun :P
[14:34] <jdtanner> :P
[14:34] <Darkside> cheater
[14:34] <number10> for a job Darkside , in a national park!
[14:34] <jdtanner> Well I've just bought that microcontroller + usb interface
[14:35] <number10> ah... there was I getting my hopes up
[14:35] <number10> ;)
[14:35] <jdtanner> Yeah, I donlt think that my HR team would go for that type of exchange! My team on the other hand would be well up for it! :D
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[14:36] <number10> can you convince the HR team that you need someone to walk up hills and take photographs
[14:37] <schofieldau> jdtanner: you'll need the actual radio transmitter bit too
[14:37] <jdtanner> Yes and the gps...any ideas?
[14:37] <Darkside> well the gps i linked earlier
[14:37] <Darkside> getting it from upu is probably easiest
[14:37] <jdtanner> @number10 haha
[14:37] <schofieldau> buy it from Upu
[14:37] <Darkside> i think he has radio modules too
[14:38] <Darkside> jdtanner: for testing and tracking, you will need a radio receiver capable of receiving sideband transmissions on 434MHz
[14:38] <Darkside> jdtanner: the receiver is probably going to be the most expensive part of the whole setup, if you're going to buy one
[14:38] <jdtanner> Ok, I might be able to find somebody with the necessary equipment to help; I think that will be out of my budget range :(
[14:39] <jdtanner> We are doing this on donations and fresh air really
[14:39] <Darkside> yeah
[14:39] <Darkside> you may be able to contact local amateur radio operators
[14:40] <jdtanner> Yes, I think that will have to be the case
[14:40] <schofieldau> with some luck there may be some people nearby in #hamradio
[14:41] <daveake> jdtanner Receivers sell well on ebay. You can buy one for £80-£100, use it for testing and tracking, then put it back on ebay and sell for what you paid for it.
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[14:42] <UpuWork> I have stuff in stock
[14:42] <nigelvh> WOOO IN STOCK!!
[14:42] <jdtanner> Well this is the first time on irc for me so I'll have a look around :) Good idea @daveake, but I think the wife might have something to say about that :)
[14:42] <UpuWork> in fact I just finished making a batch but they won't get posted until Tuesday
[14:42] <UpuWork> your sarcasm is noted nigelvh
[14:42] <nigelvh> Morning Upu
[14:42] <UpuWork> have a good look about jdtanner use the Wiki etc
[14:42] <UpuWork> hey there nigelvh :)
[14:43] <nigelvh> How's life?
[14:43] <number10> you can borrow my radio, when I move up for the new job jdtanner
[14:43] <jdtanner> @UpuWork, I'm trying but getting rather confused :/
[14:43] <jdtanner> haha
[14:43] <nigelvh> Also, jdtanner, i get the impression you're new. Welcome. Lots of good resources here.
[14:43] <Darkside> schofieldau: when you get to the point of needing to test the radio, let me know
[14:43] <jdtanner> Yes, very very new
[14:44] <Darkside> if you can bring your gear into uni we can test it
[14:44] <nigelvh> Well, you've got to start somewhere.
[14:44] <jdtanner> I've realised that our balloon is likely to get very lost if we rely on a GSM tracker only.
[14:44] <schofieldau> Darkside: thanks :)
[14:44] <nigelvh> Redundancy is a good plan
[14:44] <Darkside> with a radio tracker you'll know where it is at all times
[14:44] <navrac> upu - the new module arrived yesterday - thanks its a bit more sensitive and is behaving well
[14:45] <Darkside> instead of at a small number of points below 3km altitude or so
[14:45] <jdtanner> Yes, indeed. So it appears that I need this (http://ava.upuaut.net/store/index.php?route=product/product&path=71_70&product_id=67) and this (http://ava.upuaut.net/store/index.php?route=product/product&product_id=51) from Upu?
[14:45] <nigelvh> Plus some circuit brains and glue.
[14:45] <Darkside> jdtanner: naw, use a radiometrix NTX2 if you can
[14:46] <Darkside> or are we confident enough about the RFM22Bs now?
[14:46] <navrac> if your not fussy about weight the ntx is hard to beat for simplicity of use
[14:47] <jdtanner> There are two variants on Upu's website of the NXT2?
[14:47] <Darkside> yeah
[14:47] <navrac> and less 'drifty' and less fussy about the supply - but more versatile
[14:47] <Darkside> pick one :P
[14:47] <UpuWork> Pick the 075
[14:47] <jdtanner> Ah, so there isn't a preffered one then?
[14:47] <UpuWork> as I don't have any 650's :)
[14:47] <jdtanner> haha...ok :)
[14:47] <UpuWork> its the frequency it works at
[14:48] <jdtanner> yep, got it...expect an order later then ... plus lots of questions when everything arrives!
[14:48] <UpuWork> no problems at all
[14:49] <navrac> well this is a good place to ask
[14:49] <UpuWork> like I say won't ship until Tuesday due to bank holidays
[14:49] <UpuWork> hi navrac did you get the GPS ?
[14:49] <navrac> yep - just mentioned it 10 lines up - thanks its working well
[14:49] <schofieldau> Darkside: about to get the RTTY part working - any glaring errors so far? https://github.com/ajhutton/TinyTracker/blob/master/tracker/tracker.ino
[14:50] <UpuWork> ah sorry been running between the PC and the solder station
[14:50] <Darkside> schofieldau: a rtty object? >_>
[14:50] <navrac> suns gone in so ozzie2 is now running on battery power- i can now use spcenear.us as a sunshine measureing tool
[14:51] <schofieldau> Darkside: using http://wdhab.blogspot.com.au/2011/11/rtty-library-for-arduino.html
[14:51] <schofieldau> and the object is how it gets configured
[14:51] <jdtanner> @schofieldau: I might try and follow your work if that is ok as you are obviously a few steps ahead of me :)
[14:51] <Darkside> boo
[14:51] <Darkside> you don't need to configure it like that
[14:51] <Darkside> :P
[14:52] <Darkside> hoooold on
[14:52] <Darkside> pm me an email
[14:52] <schofieldau> jdtanner: no problem :)
[14:53] <jdtanner> Are you just looking for position reporting like me?
[14:54] <schofieldau> yep. although I doubt it's much work to add temperature sensors
[14:54] <Darkside> hardly anything at all
[14:55] <jdtanner> Ok (sorry for the questions)...I'm going to order those parts from Upu now.
[14:56] <UpuWork> jdtanner when you get to the checkout
[14:56] <UpuWork> apply coupon UKHAS
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[14:57] <jdtanner> okey cokey
[14:58] <Laurenceb> http://www.reactionengines.co.uk/news_mar12.html
[14:58] <Laurenceb> ok thats some serious hardware :P
[14:59] <UpuWork> right afk for a bit
[15:00] <Dutch-Mill> Good afternoon UPU ; have a question
[15:00] <NigelMoby> ure dongle there Laurence?
[15:01] <fsphil> UpuWork, it's a holiday :p
[15:04] <jdtanner> Taken the plunge and now have a gps module, rf module, and a microcontoller all ordered.
[15:04] <chris_99> this looks pretty intriguing http://spaceflight1.nasa.gov/realdata/sightings/cities/region.cgi?country=United_Kingdom&region=England
[15:04] <fsphil> excellent
[15:04] <jdtanner> Now just to put them all together, and get it working eeek
[15:04] <Dutch-Mill> Hi All I'm testing my transmitter but the line remains red in dfdigi.. do you need to register a HAB first ?
[15:04] <fsphil> one step at a time jdtanner :) I don't think you'll have a problem
[15:04] <fsphil> Dutch-Mill, sounds like the checksum isn't matching the string
[15:05] <fsphil> can you paste an example?
[15:05] <Laurenceb> NigeyMoby: at work atm
[15:05] <jdtanner> Indeed...
[15:05] <Dutch-Mill> Yep : $$$$STRATORIDER,212,15:05:31,51.994121,4.167809,-3,-1,7*93EA
[15:06] <jdtanner> I'm sure I'm going to need my hand holding programming the microcontroller
[15:06] <schofieldau> jdtanner: I'm going through that at the moment :P
[15:06] <chris_99> do you have a programmer already, jdtanner?
[15:06] <Darkside> chris_99: he's getting one with the board
[15:07] <chris_99> aha
[15:07] <jdtanner> Yes, this is my first time progarmming a microcontroller :/
[15:08] <fsphil> Dutch-Mill, you're calclating the checksum with two $$'s at the start
[15:08] <fsphil> you need to start after all the $'s
[15:09] <Darkside> lol someoen is playing music on 40m..
[15:09] <Dutch-Mill> Oke thanks so remove two of them. ?
[15:10] <fsphil> Dutch-Mill, or skip past them when calculating the checksu,
[15:10] <fsphil> checksum
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[15:22] <jdtanner> @schofieldau Are you happy if I drop you an email?
[15:24] <schofieldau> jdtanner yep sure
[15:25] <jdtanner> Cheers, I've got your addres I think
[15:25] <schofieldau> just PM'd it to you
[15:25] <schofieldau> although it's all over the web :P
[15:25] <jdtanner> Awesome, thanks :)
[15:25] <jdtanner> haha
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[15:26] <schofieldau> ugh the arduino IDE just does not understand scrolling in os x
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[15:34] <Darkside> i don't code in the arduino ide
[15:34] <Darkside> i use an external editor
[15:34] <Darkside> theres an option in the arduino preferences
[15:35] <Darkside> so then you just edit code in Textwrangler or vim or whatever
[15:35] <Darkside> and just press the compile button in arduino
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[15:39] <schofieldau> ah
[15:39] <schofieldau> nice
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[15:53] <Hibby> Darkside: not a scons fan?
[15:53] <Hibby> *arscons, even
[15:53] <Darkside> ?
[15:53] <Darkside> what do you mean?
[15:53] <Hibby> cut out the arduino bit entirely
[15:53] <Hibby> http://code.google.com/p/arscons/
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[15:54] <Darkside> hmm
[15:54] <Hibby> uses the files for the arduino IDE, but avoids the ide/java bit
[15:54] <Darkside> might give it a go
[15:54] <Darkside> as long as it will upload with the usp
[15:54] <Darkside> isp*
[15:54] <Hibby> so I tend do have nano and that open in terminator.
[15:55] <Hibby> i imagine it will, with a wee bit of conf manipulation
[15:55] <Darkside> hmm
[15:55] <Darkside> well,maybe
[15:56] <Hibby> it uses avrdude
[15:57] <Hibby> so it'll be a case of changing the settings in the relevant file... port and baud rate
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[15:58] <Hibby> equally, it's a new workflow that may/not be better/more efficient for you
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[16:05] <cuddykid> http://pic.twitter.com/JokKb63g <- rivalling eroomde's cooking skills :P
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[16:08] <jcoxon> are their ghosts in spacenear.us?
[16:10] <navrac> ghosts?
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[16:11] <jcoxon> yeah, occasionally old telem appears
[16:12] <navrac> all looks like recent uploads to me well since the 4th
[16:12] <fsphil> someone might be replaying an old recording
[16:13] <navrac> Ozzies having a test run at the moment - trying to monitor battery voltage v's estiamted life
[16:13] <navrac> need to fix the battery current sense though
[16:14] <daveake> atlas landed hard
[16:14] <navrac> but it would appear thaat the entire draw for ozzie is around 30mA
[16:15] <daveake> 30mA ave with power saving on?
[16:15] <navrac> might have found a mineshaft
[16:15] <navrac> yep - 30mA with 8dbm and powersaving on the gps
[16:15] <navrac> majority is the rfm
[16:16] <navrac> closer to 32mA
[16:16] <daveake> And that's 30mA from battery into step-up?
[16:16] <navrac> after step up
[16:16] <navrac> so probably 35mA its running with 3
[16:16] <daveake> OK, and how much going int?
[16:17] <navrac> vv batteries so 90%_ efficiency
[16:17] <jcoxon> navrac, good work!
[16:17] <daveake> 3 into a step-up?
[16:17] <navrac> yep -
[16:17] <daveake> Nice, so close to 30 hours run time then
[16:18] <navrac> the logic being that i want to squeeze every last minute out the batteries when they are at 1.7V - trading efficiency for the ability to recharge from the solat
[16:18] <daveake> Does the DC-DC do step down as well as up?
[16:18] <navrac> when the sun was out todaay I had 40mA spare capacity
[16:18] <navrac> no
[16:18] <daveake> Ah yes I forgot about the solar
[16:18] <navrac> the solar is direct into a 3v3 low drop out
[16:18] <daveake> You need to get this to float for a day or so then :)
[16:19] <navrac> well its down to luck - but I'd like it to float through the day to at least dusk so I can see how much solar I can get/ wasting by my curren t method of doing it
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[16:19] <jcoxon> i'm excited!
[16:20] <navrac> I'm expecing it to go for 2 hours and go swimming
[16:20] <daveake> Good luck for a looooong float then :)
[16:20] <navrac> thanks
[16:20] <jcoxon> navrac, i'll be keen to see your code at some point (if thats okay)
[16:21] <navrac> its a bit messy but of course
[16:21] <navrac> I'll pastebin it in a moment
[16:21] <Laurenceb> http://www.youtube.com/watch?v=_sUeGC-8dyk
[16:21] <jcoxon> navrac, you should use github
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[16:30] <navrac> i should do - but that would be organised
[16:32] <jcoxon> hehe
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[16:37] <navrac_> http://pastebin.com/PmvsHTwj
[16:37] <navrac> it needs sorting out as it has been hacked to bits while experimenting
[16:38] <jonsowman> version control ;)
[16:38] <navrac> but basically its a 5 seconds powersave mode - and various times set - from trial and error - might need to reverse engineer them.
[16:39] <navrac> And then send the poll message and keep retrying till you get a reply
[16:39] <navrac> version control - I do that all day at work - this is a hobby, I'm allowed to be lazy!
[16:40] <jonsowman> haha it might make your life easier
[16:40] <navrac> but less fun
[16:40] <jcoxon> cool
[16:40] <navrac> it would be like my day job otherwise
[16:40] <jcoxon> navrac, i'll put up my code in a bit
[16:40] <jcoxon> think they'll combine nicely
[16:40] <navrac> well most of the code is yours in the first place!
[16:41] <navrac> might as well nick the 4 lines out of ozzie2 that i wrote!
[16:43] <jcoxon> navrac, https://github.com/jamescoxon/PicoAtlas/blob/master/Pico6MK3/sketch_apr05a/sketch_apr05a.pde
[16:44] <schofieldau> night all :)
[16:44] <jcoxon> oops
[16:44] <jcoxon> thats not all of it
[16:45] <jcoxon> try this one: https://github.com/jamescoxon/PicoAtlas/blob/master/Pico6MK3/sketch_apr02b/sketch_apr02b.ino
[16:46] <navrac> thats pretty compact - and neat!
[16:47] <jcoxon> basically it has a loop which chirps every 10seconds
[16:47] <jcoxon> after 5 minutes it'll turn on the GPS
[16:47] <jcoxon> and when it gets a lock will send the position in slowhell
[16:47] <jcoxon> then reset the counter and chirp for 5 mins
[16:48] <jcoxon> if its day time though and its got a lock it'll enter a loopand do rtty
[16:48] <navrac> planning a round the world trip!!!
[16:49] <navrac> with solar and batteries it will go on forever
[16:49] <jcoxon> it should do quite well
[16:49] <jcoxon> especially with your powersaving code for daytime rtty
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[16:50] <navrac> worth running the carrier for a few seconds before sending in night time mode - with the rfm's drift characteristics it would be good to give the listeners something to tune in to.
[16:51] <jcoxon> yeah
[16:51] <jonsowman> better to send preamble data rather than pure carrier
[16:52] <navrac> I opted for sending the packet twice in a row - most people will miss the atart of the first packet but have time to reset the autotune and then let that lock in for the second packet
[16:52] <jcoxon> thats the advantage of slow-hell
[16:52] <jcoxon> its async
[16:52] <navrac> very true
[16:52] <jonsowman> navrac: just send UUUUUUUUUUU$$... blah
[16:52] <jonsowman> AFC can't lock onto a carrier
[16:52] <jonsowman> well, fldigi's can't, anyway
[16:52] <navrac> hence resending twice
[16:52] <navrac> rather than carrier
[16:53] <jcoxon> sending twice is a very good idea
[16:53] <navrac> also if its really marginal signal - you might be able to piece together two halves
[16:53] <jcoxon> that was the big issue with pbh and its morse
[16:53] <jcoxon> a bit of fading and you'd be waiting 20mins for hte next telem
[16:53] <jonsowman> well okay, but preamble first for AFC's sake
[16:53] <jonsowman> otherwise you're always going to miss the first one
[16:54] <jcoxon> for rtty i agree
[16:54] <jonsowman> yeah for rtty
[16:54] <jcoxon> the other thing i'm thinking about is using a bmp085 for altitude
[16:54] <jcoxon> inbetween gps on/off
[16:54] <jcoxon> as its minimal draw
[16:54] <navrac> ok - I'll add some preamble - grumble, grumble
[16:54] <jcoxon> and we are low alt so it actually works
[16:55] <jonsowman> jcoxon: do you know what pressure it goes down to out of interest?
[16:55] <jonsowman> i've never used them
[16:55] <jcoxon> well it goes a bit funky
[16:55] <jcoxon> so no one really knows
[16:55] <jonsowman> haha okay
[16:55] <jonsowman> roughly?
[16:55] <jonsowman> a freescale one we used a while back was 110mb iirc
[16:55] <jcoxon> http://www.sparkfun.com/products/11088
[16:55] <jcoxon> wow
[16:56] <jonsowman> yeah that's really cool
[16:56] <navrac> ' a bit funky' how scientific is that from a man who thinks I should use github?
[16:56] <navrac> :-)
[16:56] <jcoxon> oi
[16:56] <jonsowman> agreed on github ;)
[16:57] <jcoxon> i can fork your flight code
[16:57] <jcoxon> jonsowman, your gps code has significantly improved my code
[16:57] <jonsowman> jcoxon: glad it helped :)
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[16:58] <jonsowman> jcoxon: datasheet reckons 300mb, which is about 10km, so perfect for picos
[16:58] <jcoxon> yeah
[16:58] <jcoxon> navrac, i might be able to launch next week
[16:59] <navrac> that would be good.
[16:59] <jonsowman> jcoxon: planning on trying that spot thing? if nobody else is i'm tempted to give it a go
[16:59] <jonsowman> after exams...
[17:00] <navrac> If we dont gewt floaters I'm going to design a cut down payload so i can launch a few till i get the right mass/fill ratio
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[17:01] <jcoxon> jonsowman, it would be cool
[17:01] <jcoxon> i actually cancelled my sub to SPOT
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[17:01] <jonsowman> not using it enough to make it worthwhile?
[17:01] <jcoxon> more that its lost in europe
[17:02] <jonsowman> hehe
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[17:02] <jcoxon> and its sub is linked to a device
[17:02] <jonsowman> oh of course
[17:02] <jonsowman> forgot that
[17:02] <navrac> its seriously impressive for 19.95
[17:03] <navrac> cover it with solar cells and hang spot on its own - might get it back then - or find out where it ended up
[17:04] <jcoxon> well it might be more suited to a sea buoy
[17:04] <Upu> Could make that for £5 :/
[17:04] <jonsowman> the spot itself is expensive though
[17:04] <jcoxon> something i had been working on that
[17:04] <jonsowman> Upu: mm
[17:04] <jcoxon> Upu, the reverse engineering i suspect is the cost
[17:05] <Upu> yeah
[17:05] <jcoxon> will bbl
[17:07] <navrac> likewise - going to repair the power board for ozzie
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[17:21] <sondaechoes> hola?
[17:21] <Upu> afternoon
[17:23] <Upu> Afk cooking
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[17:39] <cuddykid> looks like we might have 2 launches next friday/weekend - mine and WillDuckworth's
[17:39] <cuddykid> mine pending balloon, testing and payload box construction :P
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[17:42] <Lunar_Lander> cuddykid, XD!
[17:43] <cuddykid> altitude is the only thing on the cards this time - higher the better!
[17:43] <cuddykid> daveake, I'm coming for you :P
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[17:50] <daveake> I'm scared ....
[17:50] <cuddykid> armed with broken uBloxs and wrongly wired FETs
[17:50] <daveake> So I don't need to fire up my laser gun?
[17:52] <cuddykid> not just yet
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[17:56] <Lunar_Lander> XD
[17:58] <Lunar_Lander> ohh why are the FETs wrongly wired cuddykid ?
[17:58] <cuddykid> they were (few months ago when I was building cutdown), just me not being able to wire them up properly lol
[17:58] <navrac_> hmm - my circuit to measure the current on the battery power horrendously overreads
[17:59] <navrac_> eith that or the boost reg is only 50% efficient
[17:59] <daveake> Which reg and how many volts going in?
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[18:00] <daveake> And can you just measure with a meter to check the calibration?
[18:00] <navrac_> ncp1402 2.78V in
[18:00] <navrac_> the meter reading before the reg is reading about the same - suspect theres some ac component
[18:01] <navrac_> or its rather peaky and thats what its capturing
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[18:02] <F5MVO> good evening all
[18:02] <navrac_> im only pulling 35mA on the output of the regulator - but the meter says 50mA on the in and the A/d says 67-70
[18:03] <jcoxon> hi F5MVO
[18:03] <navrac_> the datasheet says 85% - call it 80%
[18:03] <F5MVO> hi jcoxon
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[18:05] <daveake> Yeah should be around 80% or so
[18:06] <daveake> You've got 83% there
[18:06] <navrac_> I suspect its pulling lots of short peaks to boost and thats what im capturing - I'll recalibrate based on 80% efficiency
[18:07] <navrac_> i wish i had my scope here
[18:07] <F5MVO> Could someone explain how a multi time day prediction on a single card CUSF, it is possible, is there a link ?
[18:07] <daveake> 35 * 3.3 / (50 x 2.78 ) ==> 83%
[18:08] <jcoxon> F5MVO, do you mean, do multiple predictions for a single day
[18:08] <jcoxon> ?
[18:08] <navrac_> yep so the reading should be about 50mA
[18:08] <F5MVO> yes and no , multi prediction time for different days also
[18:08] <jcoxon> oh right
[18:08] <jcoxon> the hourly predictor
[18:09] <F5MVO> yes
[18:09] <jonsowman> F5MVO: http://hourly.cusf.co.uk
[18:09] <navrac_> I'll fudge it then. The current is largely constant - its more the ratio of solar to battery im interested in
[18:09] <F5MVO> but i can't link for hourly prediction
[18:09] <jonsowman> F5MVO: click the dots :)
[18:10] <jcoxon> navrac_, so looks like a south flight path on sunday
[18:10] <jcoxon> over france
[18:11] <F5MVO> yes, i can see, but i can't simulat himself
[18:11] <F5MVO> i can't enter my parameters
[18:11] <navrac_> yep and if it really floats last time i looked it then heads over the balaeric and crosses italy and then heads for bulgariac or similar
[18:12] <jonsowman> F5MVO: yes, unfortunately at the moment it can only run a single scenario
[18:12] <navrac_> i havent checked since this morning
[18:12] <jonsowman> F5MVO: if you give me your parameters i can run it for you for a few days
[18:13] <F5MVO> yes, but i can't run himself my parameters ?
[18:13] <jonsowman> F5MVO: not on our server, sorry
[18:13] <jonsowman> it is something I might look into doing in the future though
[18:14] <F5MVO> it's just for my information
[18:14] <jonsowman> it's quite bandwidth and processor intensive
[18:14] <jonsowman> hence only running one scenario at the moment
[18:15] <F5MVO> thanks for your answers
[18:15] <jonsowman> no problem :)
[18:19] <F5MVO> I will watch Sunday OZZIE2, see you later
[18:19] <F5MVO> good night
[18:19] <jcoxon> cya
[18:20] <jonsowman> bye
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[18:21] <navrac_> hmm - the wide power swings on powersave when the signal is weak are upsetting the rfm22 a bit
[18:22] <navrac_> i can see when the signal is poor the gps doesnt update and the rfm gets pulled of frequency and so you get a corrupted repeated packet
[18:22] <navrac_> hmm
[18:23] <jcoxon> hmm indeed
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[18:25] <navrac_> its not often so I can live with it - but its not ideal - having said that it is indoors... no sign of it doing it when outdoors
[18:25] <navrac_> and I.ve added a preamble - it goes
[18:25] <navrac_> P
[18:25] <navrac_> R
[18:25] <navrac_> E
[18:25] <navrac_> A
[18:25] <navrac_> etc
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[18:26] <jcoxon> hehe
[18:26] <jcoxon> jonsowman can rest easy now
[18:27] <navrac_> i was going to put jonsowman as the preamble - or 'nogithubhere'
[18:27] <jonsowman> hahaha
[18:27] <jcoxon> just putting U's wasn't enough then...
[18:28] <navrac_> why waste bandwidth on U's!
[18:28] <jonsowman> :D
[18:31] <fsphil-laptop> $'s would be better :)
[18:32] <navrac_> well if i could work the code out i'd put hello in the language of the coutry its over
[18:32] <fsphil-laptop> hey that's a good idea
[18:32] <navrac_> not on an arduino it isnt
[18:32] <fsphil-laptop> NigeyS can draw the country outlines, and I've code for calculating if it's inside or outside the are
[18:33] <fsphil-laptop> +area
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[18:34] <navrac_> seems a waste to put a preamble in and not use it
[18:34] <navrac_> for anything other than being a preamble
[18:35] <fsphil-laptop> I should program mine to say "Ay-up down there!"
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[18:37] <fsphil-laptop> high altitude greetz
[18:38] <fsphil-laptop> are you doing another uplink on this one navrac_?
[18:38] <navrac_> no - too much fiddling to do on you own - this ones staying simple.
[18:39] <navrac_> really just testing solar and low power gps modes
[18:40] <fsphil-laptop> probably wise
[18:41] <cuddykid> what are the commands to alter power of rfm22b?
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[18:42] <daveake> You just poke a value into a register. The manual has a table of value vs power
[18:42] <jonsowman> datasheet will help you a lot on that i should think :)
[18:42] <navrac_> register 0x6D
[18:42] <daveake> It does help :)
[18:43] <daveake> navrac_ has memorised the register map :p
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[18:43] <navrac_> to save you reading through the whole thing to identify wjich register - its not all that clear in the main datasheed
[18:43] <SpeedEvil> Reading datasheets?
[18:43] <SpeedEvil> Madness, I say, madness!
[18:43] <jonsowman> shocking isn't it
[18:43] <navrac_> you'll be suggesting github next
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[18:44] <jonsowman> :(
[18:44] Action: SpeedEvil buys a new laptop.
[18:44] <SpeedEvil> (for 99 quid)
[18:44] <SpeedEvil> (It's not that new)
[18:44] <Laurenceb_> NigeyS: got the dvbt stick thanks
[18:44] <fsphil-laptop> newish
[18:44] <Laurenceb_> now i need an mcx connector
[18:44] <navrac_> this rfm seems well underpered compared to the last ones
[18:44] <G0DJA> I was given a PC that cost me £30 for enough RAM to make it useable :-)
[18:44] <SpeedEvil> 'desktop replacement' to drive my really cheaply acquired 30" monitor. Which is my first newly acquired splurge for _ages_.
[18:45] <SpeedEvil> 2560*1600
[18:45] <pjm> is there a UK balloon launch over this easter?
[18:45] <SpeedEvil> - and yes - the laptop will drive it.
[18:45] <SpeedEvil> :)
[18:45] <navrac_> reminds me - im going to play with the series capacitance register to try some other values to see if it makes it less temperature sensitive
[18:46] <jonsowman> navrac_: interesting, where is that capacitor?
[18:46] Action: jonsowman reads the datasheet too
[18:46] <fsphil-laptop> sheesh
[18:47] <navrac_> its internal - and i think the cause of the extreme temperature sensitivity of the thing
[18:47] <Laurenceb_> navrac_: usually xtals are deisgned for a certain cap size
[18:47] <jonsowman> oh this is a xtal load cap? i see
[18:47] <Laurenceb_> aiui its not just to make them oscillate at the correct frequency
[18:47] <navrac_> yep and im wondering if the power up value of the programmable cap is 'non ideal'
[18:47] <Laurenceb_> got you
[18:48] <jonsowman> makes sense
[18:48] <Laurenceb_> this is where a xtal datasheet would help
[18:48] <navrac_> well its worth a try and ive got a can of freezer spray somewhere
[18:48] <Laurenceb_> but as its an off the shelf module...
[18:48] <navrac_> but not an off the shelf chip
[18:48] <jonsowman> freezer spray is fantastic
[18:48] <navrac_> i use it to kill wasps
[18:48] <fsphil-laptop> is it what the name suggests?
[18:48] <jonsowman> wow i must try that
[18:48] <navrac_> and then try to revive them infront of a fan heater
[18:49] <jonsowman> navrac_: do you think you have too much time on your hands? :D
[18:49] <fsphil-laptop> navrac_, do your eyes glow when you get angry?
[18:49] <navrac_> well I've discovered an interesting thing about my company
[18:49] <SpeedEvil> I skip the cooling stage, and go straight to a blowtorch.
[18:50] <navrac_> nobody ever wants to do tech support.
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[18:51] <navrac_> So I've discovered that actually its really easy - so to free up time for people to do development , i've offered to do support for a while
[18:51] <pythonirc101> I am looking into ardrone 2.0. Is there something similar available that has a larger range?
[18:51] <navrac_> so I do the support in 10 mins per hour and spend the rest playing with bits or napping
[18:51] <jonsowman> or freezing and thawing insects?
[18:51] <navrac_> exactly
[18:51] <jonsowman> sounds like a good deal to me
[18:52] <navrac_> its a win win - everybody thinks i'm a cool boss and being a hero and i get to play around
[18:52] <pythonirc101> anyone knows where I can get some help on drones, uavs?
[18:53] <SpeedEvil> navrac: I suggest you get an app with a soundboard for your phone. 'Sunspots, try again tomorrow', 'Have you tried turning it off and on again', ...
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[18:54] <navrac_> nah - its nice to chat with the customers once in a while and gives me a good insight into our development program.
[18:54] <fsphil-laptop> always good to talk to customers
[18:54] <SpeedEvil> :)
[18:55] <fsphil-laptop> well, most of the time
[18:55] <fsphil-laptop> and some of them
[18:55] <navrac_> yep - even if its so i can tell the developers - 'yes the customer can be that stupid..'
[18:56] <daveake> Had a call during the week .. "Dave, the machine is free for the rest of the day so you can connect in now"
[18:56] <daveake> Me: "Er, it's 7pm and I'm not working!"
[18:56] <daveake> I guess he forgot which shift he was on
[18:57] <jonsowman> haha
[18:57] <jcoxon> pythonirc101, a bit or uav stuff gets discussed here
[18:57] <jcoxon> but diydrones is the best place really
[18:57] <Laurenceb_> pythonirc101: you can head to #openpilot for hardcore uav talk
[18:57] <pythonirc101> jcoxon: not on freenode then?
[18:58] <Laurenceb_> just watch out for the trolls
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[18:58] <navrac_> my favourite was after an hour trying to work out what why a customers computer would not run the program on monday morning and him assuring me nothing had changed. I remoted in and couldnt find any trace of the program
[18:58] <pythonirc101> Thanks , I'll head to openpilot
[18:58] <fsphil-laptop> hah
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[18:58] <navrac_> so i said are you really sure nothing has changed
[18:59] <navrac_> he said - well its a new computer....
[18:59] <jonsowman> brilliant
[18:59] <navrac_> but its the same as the old one
[18:59] <daveake> lol
[19:00] <daveake> One asked me to do a bit extra when I connected remotely to his computer ...
[19:00] <daveake> .... he wanted his keyboard repaired.
[19:00] <daveake> Don't think VNC has that option
[19:01] <jonsowman> feature request
[19:01] <fsphil-laptop> I never get that sort of stuff, mostly just people not reading the screen
[19:02] <daveake> Once had the "my mouse is working upside down" one
[19:03] <daveake> I wonder how these people manage to get dressed in the morning
[19:03] <navrac_> yep
[19:04] <gonzo_p> they put their trousers on upside-down
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[19:19] <navrac_> ping jcoxon
[19:20] <navrac_> daveake - are you near an rfm22
[19:27] <jcoxon> navrac_, i've got to go to work unfortunately
[19:27] <jcoxon> here for a nother 5mins
[19:28] <Laurenceb_> crazy
[19:28] <navrac_> ok when you have time try poking a few values at register 0x09
[19:28] <Laurenceb_> what time do you finish?
[19:28] <jcoxon> i'm on nights
[19:29] <jcoxon> to 9am tomorrow
[19:29] <navrac_> it seems to cut down the temperature and drift isues on powering up powering down
[19:29] <Laurenceb_> whats 0x09?
[19:29] <number10> thats over 12 hours jcoxon
[19:29] <navrac_> ive changed the default of 7f to 65 and its really reduced the sensitivity to stray capacitance, supply variations and local heating
[19:29] <Laurenceb_> thats insane jcoxon :O
[19:29] <navrac_> the programmable load cap for the crystal
[19:29] <Laurenceb_> ah
[19:30] <fsphil-laptop> it seems an incredibly flexible little radio
[19:30] <jcoxon> number10, yeah thats a normal shift for me
[19:30] <Laurenceb_> the networking stuff is epic
[19:31] <Laurenceb_> jcoxon: try and stay awake :D
[19:31] <navrac_> incredibly daft that hoperf dont put something about it in their datasheet rather than just copying silabs word for word
[19:31] <jcoxon> oh i've been asleep all day
[19:31] <fsphil-laptop> I did a few 12hr days this week and I'm knackered
[19:31] <Laurenceb_> navrac_: they like to pretent its their custom ic
[19:31] <navrac_> well have a good shift
[19:31] <Laurenceb_> its just a lasered si4432
[19:32] <navrac_> yep - so are the datasheets - search and replace and insert hope
[19:32] <navrac_> going to play with more values
[19:32] <Laurenceb_> lol
[19:32] <jonsowman> sounds like my bugfixing strategy
[19:32] <jonsowman> insert hope
[19:33] <fsphil-laptop> #include <hope.h>
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[19:33] Action: Laurenceb_ has been chasing bugs all day
[19:33] <fsphil-laptop> to freeze them?
[19:33] <Laurenceb_> seeing gdb terminal when i close my eyes
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[19:33] <fsphil-laptop> oh that's navrac_
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[20:05] <Laurenceb_> SpeedEvil: you know how to beat the widescreen mafia?
[20:05] <SpeedEvil> Laurenceb: I cheated.
[20:05] <Laurenceb_> buy a macbook pro
[20:05] Action: Laurenceb_ runs
[20:06] <SpeedEvil> I got a widescreen monitor that is taller than my existing one.
[20:06] <SpeedEvil> It's actually taller than my existing one is wide.
[20:06] <SpeedEvil> I am strongly considering getting a 1400x1050 display for my existing 12" laptop
[20:07] <Laurenceb_> nice
[20:07] <Laurenceb_> i use iiyama prolite non widescreens
[20:08] <SpeedEvil> I got a half priceish 30" 2560*1600 one.
[20:08] <SpeedEvil> Which draws only 60W or so when in 'not blinding' mode.
[20:09] <SpeedEvil> I note that solar panel prices are going down a hair on ebay.
[20:09] <SpeedEvil> some popping up at under a quid a watt - if you're willing to collect
[20:13] <fsphil-laptop> I may sell my panels, just don't have the right location to get good use of them
[20:13] <Laurenceb_> yeah i linked some a while back
[20:13] <Laurenceb_> the panels in the field near me got smashed on wednesday
[20:13] <SpeedEvil> Hail?
[20:13] <Laurenceb_> storm ripped them out of the ground
[20:13] <SpeedEvil> Ah
[20:13] <fsphil-laptop> ooch
[20:13] <Laurenceb_> theres still snow here
[20:14] <Laurenceb_> -near derby
[20:15] <Laurenceb_> http://compare.ebay.co.uk/like/280775134930?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&adtype=pla
[20:15] <Laurenceb_> 45p/Watt i think
[20:15] <SpeedEvil> I was meaning actual finished panels
[20:15] <Laurenceb_> ah
[20:16] <SpeedEvil> http://www.ebay.co.uk/itm/Solar-PV-Panels-190w-ALM-190D-24-0-65-VAT-per-Watt-/170818436907?pt=LH_DefaultDomain_3&hash=item27c5927f2b
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[20:19] <Laurenceb_> nice
[20:20] Action: SpeedEvil wishes he was closer.
[20:20] <SpeedEvil> - and well - teh whole bus thing.
[20:23] <SpeedEvil> Also - woo!
[20:23] <SpeedEvil> I just realised that last powercut takes me over the limit where compensation may be payable.
[20:32] <G0DJA> I have a couple of the panels that Maplin were selling off cheap a while ago. Must dig them out again now 'summer' is nearly with us
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[20:42] <Lunar_Lander> I got a question for advice on cutdown wires
[20:43] <Lunar_Lander> we had the wire as such but my slovenian friend said I have to get "RC wires" for the wires that I "don't want to burn"
[20:43] <Lunar_Lander> he says we need a battery
[20:43] <Lunar_Lander> 2000 mAh, 3S 20 C
[20:43] <Lunar_Lander> 12 volts, max of 40 amps
[20:44] <SpeedEvil> umm...
[20:44] <SpeedEvil> What are you planning as cutdown?
[20:44] <Lunar_Lander> wait
[20:44] <SpeedEvil> A li-ion cell will be almost useless at -40C
[20:45] <Lunar_Lander> http://www.timzaman.nl/?p=1878&lang=en
[20:45] <Lunar_Lander> basically this with a MOSFET instead of the relay
[20:46] <SpeedEvil> So ~2A?
[20:46] <Lunar_Lander> yea, let's say 2A
[20:46] <SpeedEvil> Standard wires will work just fine.
[20:47] <SpeedEvil> However, can anyone comment on the standard lithium AA cells at 2A and temperature?
[20:47] <Lunar_Lander> yea that would be interesting to know
[20:47] <Lunar_Lander> the lab has a -80°C freezer btw, can this help to experiment?
[20:49] <SpeedEvil> Sure!
[20:49] <Lunar_Lander> that is good
[20:50] <Lunar_Lander> :)
[20:53] <r2x0t> SpeedEvil: not sure if this helps in any way, but the Vaisala sondes (RS-92SGPD) uses classic Alkaline batts (seen Duracell, Panasonic, Powerline in sondes I found)
[20:53] <SpeedEvil> I don't think they have cutdowns
[20:53] <Lunar_Lander> yes
[20:53] <Lunar_Lander> they don't have them
[20:54] <r2x0t> just saying they use them, so probably should be reliable enough
[20:54] <SpeedEvil> r2x0t: If you need to draw 2A from a battery - it doesn't work like that
[20:54] <SpeedEvil> Lunar_Lander: I cheated - I have some 350C rated 1W resistors
[20:54] <r2x0t> this isn't best idea for cutdown
[20:54] <r2x0t> it will need huge and heavy battery just for that
[20:55] <SpeedEvil> Lunar_Lander: simply wrap a little insulation round them, and press a string against the side on a tangent
[20:55] <SpeedEvil> apply power for 1 min or so
[20:56] <Lunar_Lander> ah
[20:56] <Lunar_Lander> OK one moment
[20:56] <Lunar_Lander> is there a possibility to eliminate the heavy battery?
[20:57] <SpeedEvil> If you only need 1W to cutdown - then yes
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[20:57] <r2x0t> use some explosive :)
[20:58] <Lunar_Lander> ohhh
[20:58] <Lunar_Lander> not good I think
[20:58] <Lunar_Lander> we need to use the hotwire method
[20:59] <r2x0t> may not even be explosive, just flammable
[20:59] <r2x0t> like plastic tube filled with something
[20:59] <r2x0t> when you light it, it will burnt, weakening it enough
[21:00] <r2x0t> if I remember correctly, SHARP guys used something like this
[21:02] <natrium42> hi kevin
[21:02] <Lunar_Lander> hi natrium42
[21:02] <Lunar_Lander> did you all also got a "Global Notice" too?
[21:02] <Laurenceb_> ive used 0.125W resistors
[21:03] <Lunar_Lander> what did you do with them?
[21:03] <Laurenceb_> 10ohm
[21:03] <natrium42> not sure
[21:03] <SpeedEvil> r2x0t: yes - however, this is not testable
[21:03] <Laurenceb_> for cutdown lol
[21:03] <natrium42> i was disconnected from my screen session
[21:03] <Laurenceb_> worked 5 times out of 5
[21:03] <SpeedEvil> r2x0t: I prefer a nice testable repeatable solution that can be reused
[21:03] <Laurenceb_> -at altitude
[21:03] <Laurenceb_> and many times on the ground
[21:03] <SpeedEvil> r2x0t: 1W resistors - used to spec.
[21:03] <SpeedEvil> And yes, 1/8W, burned out will probably work fine.
[21:03] <Laurenceb_> yeah 10ohm ones self destruct after ~10 second sat 5v
[21:03] <Lunar_Lander> yeah would you use the resistors in place of the wire?
[21:03] <SpeedEvil> Lunar_Lander: yes
[21:04] <Laurenceb_> its a little tricky ad resistors arent too strong
[21:04] <Laurenceb_> i made a custom bit of pcb
[21:04] <Lunar_Lander> yes
[21:04] <Laurenceb_> with large hole around the resistor
[21:04] <SpeedEvil> The 1/8W ones you aren't completely sure of the resistance as they burn out
[21:04] <Laurenceb_> and some brass tube on the other side as stree releif
[21:04] <Laurenceb_> mine cutdown in ~2s
[21:04] <Laurenceb_> and burned out after 10s
[21:05] <Laurenceb_> so i was happy itd work
[21:05] <Lunar_Lander> yes
[21:05] <Lunar_Lander> would that be MOSFET controllable as well?
[21:05] <Laurenceb_> and yeah it worked 5 times out of 5 at up to 24Km
[21:05] <Laurenceb_> yes
[21:07] <Lunar_Lander> hm
[21:07] <Lunar_Lander> I have to try to get my friend to here
[21:07] <Lunar_Lander> wait
[21:08] <Laurenceb_> i tried 1206 smd at 3.3v, but i couldnt get it work reliably
[21:09] <Lunar_Lander> yea
[21:10] <Lunar_Lander> I am just asking him and will show him the webchat
[21:10] <Lunar_Lander> will be a matter of minutes I think
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[21:12] <Lunar_Lander> ah there he is
[21:12] <Lunar_Lander> welcome
[21:12] <RisingFury> Yo
[21:13] <natrium42> you know each other IRL?
[21:13] <Lunar_Lander> online
[21:13] <natrium42> ah
[21:14] <RisingFury> Physics students gravitate together - if you'll pardon the pun...
[21:15] <fsphil-laptop> evening RisingFury
[21:15] <RisingFury> Good evening
[21:16] <RisingFury> I don't know who's question it was, but as far as I know, LiPos tend to be reliable at low and high temperatures.
[21:16] <fsphil-laptop> you mean unreliable?
[21:17] <RisingFury> Reliable.
[21:17] <RisingFury> I've seen Lipos pushed quite far.
[21:17] <NigeyS> mine froze at 7k
[21:17] <NigeyS> so..
[21:17] <fsphil-laptop> we've seen lipos die at about freezing point
[21:17] <RisingFury> As long as you don't go over current, they're safe.
[21:17] <jonsowman> the general experience of people in here seems to be that they're no good in the cold
[21:17] <jonsowman> even at ~100mA
[21:18] <RisingFury> Hmmm thought you were talking about safety and popping.
[21:18] <jonsowman> ah, no
[21:18] <RisingFury> My experience comes from RC flying, where things tend to run hotter.
[21:18] <jonsowman> they've not exploded or anything afaik
[21:19] <RisingFury> The estimated safe discharge rate can be calculated by multiplying the C rating with the capacity in amps. Example: 2000 mAh battery at 20 C will hold 2 * 20 = 40 A with no problems.
[21:19] <jonsowman> but they do freeze and terminal voltage falls right off
[21:19] <SpeedEvil> RisingFury: Not at -40C
[21:19] <RisingFury> Probably true.
[21:19] <RisingFury> Alternatives?
[21:20] <jonsowman> we tend to use Energiser Ultimate Lithiums
[21:20] <jonsowman> ~3Ah, capacity doesn't fall off much with temperature, and they weigh very little
[21:21] <RisingFury> What's the voltage?
[21:21] <jonsowman> 1.5V nominal
[21:21] <jonsowman> though when new they're normally more like 1.8V with no load
[21:22] <RisingFury> You're gonna need in the tange of 10 or more volts and high current to get a wire glowing for a cutdown...
[21:22] <RisingFury> range*
[21:23] <RisingFury> I know that one from personal experience... unfortunately...
[21:23] <Lunar_Lander> yea
[21:25] <RisingFury> Has anyone had experience with a cutdown by heating the wire until it cuts the chord?
[21:25] <jonsowman> RisingFury: i built one once and flew it, but never used it
[21:26] <RisingFury> Ever tested at low temperatures?
[21:26] <jonsowman> no
[21:26] <RisingFury> Has anyone measured the max power output of the Energizer Lithium AA at low temperatures?
[21:30] <Lunar_Lander> somone said that SHARP used a "burning" mechanism
[21:30] <Lunar_Lander> do we have details on it?
[21:32] <Lunar_Lander> r2x0t, still here?
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[21:35] <Lunar_Lander> who had helped SHARP?
[21:35] <Lunar_Lander> andrew_apex,right?
[21:36] <fsphil-laptop> don't think anyone from sharp is here
[21:36] <Lunar_Lander> hm ok
[21:36] <Lunar_Lander> do you the mechanism maybe?
[21:36] <fsphil-laptop> no idea
[21:37] <Lunar_Lander> ah
[21:37] <fsphil-laptop> nichrome wire is likely
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[21:37] <Lunar_Lander> hm
[21:37] <Lunar_Lander> r2x0t mentioned that a substance was ignited
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[21:39] <SpeedEvil> Flammable substances raise regulatory issues
[21:39] <Lunar_Lander> of course
[21:40] <SpeedEvil> In the UK, I'm pretty sure most pyrotechnic ignitors may require a fireworks factory to assemble them in.
[21:40] <Lunar_Lander> yeah
[21:40] <Lunar_Lander> I think that won't be different in continental europe
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[21:57] <Lunar_Lander> SpeedEvil, we just determined that Tim Zaman's setup is good
[21:57] <Lunar_Lander> :)
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[21:57] <SpeedEvil> :)
[21:58] <Lunar_Lander> AH now I got it
[21:58] <Lunar_Lander> I showed him Dan's Whitestar cutdown cyro test
[21:58] <Lunar_Lander> from that he determined the big battery and so on
[21:59] <Lunar_Lander> because Dan's wire lighted up
[22:00] <Laurenceb_> http://yro.slashdot.org/comments.pl?sid=2769199&cid=39595765
[22:00] <Laurenceb_> Score5: Informative
[22:00] <Laurenceb_> oh dear slashdot
[22:01] <Laurenceb_> that says a lot about their userbase
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[22:06] <Elwell> tempted to include an ascii-art dong here just for badness
[22:15] <kristianpaul> How many times a weather balloon can be re-used?
[22:15] <kristianpaul> Hi btw :)
[22:15] <fsphil-laptop> once :)
[22:16] <fsphil-laptop> they're a one-flight deal
[22:16] <kristianpaul> even if i recover it? i mean i would not let it go too high
[22:17] <Randomskk> how would you bring it down?
[22:17] <kristianpaul> i pull :)
[22:17] <fsphil-laptop> you mean a tethered balloon?
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[22:17] <kristianpaul> yeah
[22:17] <fsphil-laptop> hmm. good question
[22:17] <fsphil-laptop> I imagine not many times
[22:17] <Randomskk> still can't really reuse them very much
[22:17] <russss> probably still once
[22:18] <nigelvh> I would expect that the number would be few
[22:18] <kristianpaul> because the latex?
[22:18] <russss> they are delicate
[22:18] <Randomskk> you could keep it inflated for a little while
[22:18] <Randomskk> maybe a day or two
[22:18] <Randomskk> they are really fragile and also degrade with UV
[22:18] <kristianpaul> hmm
[22:18] <kristianpaul> may be i need cheap condoms then..
[22:18] <Randomskk> tend to have a lower lift capacity
[22:19] <kristianpaul> even for a 350gr payload?
[22:19] <Randomskk> no way will you lift a 350g payload on a condom
[22:19] <Randomskk> even an elite
[22:19] <nigelvh> Make sure you count your string/line in that weight number
[22:19] <kristianpaul> hmm
[22:19] <Randomskk> I don't think you'd get a 30g payload on it
[22:19] <kristianpaul> :(
[22:19] <Randomskk> 350g is like a standard payload
[22:20] <Randomskk> 30g is what people are pushing at the moment and that's stil a 2m+ foil balloon or such
[22:20] <fsphil-laptop> party balloons can only lift a few grams
[22:20] <kristianpaul> hmmm
[22:20] <Randomskk> condoms really are not the way to go
[22:20] <Randomskk> well
[22:20] <Lunar_Lander> XD!
[22:20] <Randomskk> you could use many of them
[22:20] <Randomskk> surprisingly un-cost-effecitive
[22:20] <nigelvh> Get some funny looks at the store while buying them.
[22:21] <SpeedEvil> Vet supply store.
[22:21] <Lunar_Lander> XD
[22:21] <fsphil-laptop> it's the second visit you'll get the funny looks
[22:21] <SpeedEvil> Get some elephant.
[22:21] <jonsowman> fsphil-laptop: lol
[22:21] <Randomskk> "stocking up"
[22:21] <Randomskk> haha "the first batch all burst"
[22:21] <Randomskk> "I overfilled the :|"
[22:21] <Randomskk> them*
[22:22] <jonsowman> stop it
[22:22] <nigelvh> "they weren't enough to deal with my payload"
[22:22] <jonsowman> :|
[22:22] <Randomskk> "we didn't have enough rope the first time"
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[22:23] <Laurenceb_> i wonder if you could launch cable and discharge the ionosphere
[22:24] <fsphil-laptop> a kind of extreme form of solar power
[22:25] <Laurenceb_> i think if it was possible youd need to retreat to a safe distance/country
[22:25] <nigelvh> Yeah...
[22:25] <SpeedEvil> Laurenceb: There was a book about that...
[22:26] <SpeedEvil> fiction
[22:26] <r2x0t> Lunar_Lander:
[22:26] <r2x0t> all I can find in history is this:
[22:26] <r2x0t> <Randomskk> then again tbh sharp's pyros seem good
[22:26] <r2x0t> <Randomskk> they were just e-matches without any powder, right?
[22:27] <Lunar_Lander> ah
[22:27] <Lunar_Lander> is ematch like a torch or so?
[22:27] <Lunar_Lander> or like a new years eve fireworks
[22:27] <Randomskk> no
[22:27] <Randomskk> electronic match. like rocket motor igniters
[22:27] <Lunar_Lander> ah these ones
[22:28] <Lunar_Lander> I thought there was some difference between the model rocket ignitor that is on the UKHAS wiki and some device filled with something flammable, that ignites on an pulse and burns down
[22:28] <Lunar_Lander> but we said above that would be like fireworks and would be regulated similarly
[22:28] <r2x0t> I guess something like this: http://www.easypyro.com/e-match-2m
[22:28] <Lunar_Lander> so the electrical cutdown with a wire should be good
[22:28] <Lunar_Lander> ah
[22:29] <Lunar_Lander> AFAIK the big NASA balloons and so on use real squibs
[22:29] <Lunar_Lander> but that is a different league
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[22:35] <jonsowman> Upu: ping
[22:36] <r2x0t> looks like these electric matches are just wires ended with short nichrome wire bridge, dipped into something flammable
[22:36] <Lunar_Lander> ah
[22:36] <r2x0t> http://blog.skylighter.com/fireworks/2008/09/how-to-make-electric-matches.html
[22:36] <Lunar_Lander> thanks
[22:36] <r2x0t> you can but just the flammable solution to dip the wire into
[22:36] <Upu> hey jonsowman
[22:36] <r2x0t> *buy
[22:37] <jonsowman> Upu: which ft817-pc cable do you have?
[22:37] <Upu> I have the Digimaster thing
[22:37] <Upu> http://www.g4zlp.co.uk/unified/DM_PRO_PLUS_complete.shtml <-
[22:38] <jonsowman> ah okay
[22:38] <jonsowman> why that rather than the yaesu cable?
[22:38] <Upu> apart from the noisy pot on the input line (get noise when adjusting inbound volume) its a good bit of kit
[22:38] <Upu> I wanted to do SSTV and stuff
[22:39] <jonsowman> ah okay
[22:39] <jonsowman> cool
[22:39] <Upu> not sure which Yaesu cable but generally they are very expensive
[22:39] <jonsowman> yeah, there are cheap ebay clones
[22:39] <jonsowman> was wondering if they're any good :)
[22:39] <Randomskk> tbh I bet you could make something witha n ftdi chip
[22:39] <Randomskk> hams love v expensive accessory cables
[22:39] <Upu> I started with a £5.99 from E-Bay serial connector and a 2.5mm jack from the headphone socket
[22:40] <Randomskk> icom works fine with literally ftdi chip and mono minijack
[22:40] <jonsowman> Upu: did that work?
[22:40] <jonsowman> Randomskk: yeah indeed
[22:40] <Upu> it was ok but getting the prolific drivers was a nightmare
[22:40] <Upu> yes
[22:40] <Upu> still got it somewhere if you want it
[22:40] <jonsowman> i'm on linux which is sometimes a pain with the PL2303 iirc?
[22:40] <jonsowman> i think perhaps making something up with an FTDI dongle would be better
[22:41] <Upu> we opened up this digi master and its got FT232 inside it
[22:41] <Upu> dual one
[22:41] <jonsowman> oh interesting
[22:41] <fsphil-laptop> ftdi + audio codec in a small box
[22:41] <fsphil-laptop> one usb plug to the computer
[22:42] <fsphil-laptop> both are pretty easy to do these days
[22:42] <Upu> Rob made a cable up that pretty much does the same thing
[22:42] <Randomskk> audio only required for tx too
[22:42] <Randomskk> so if you just want remote rx control
[22:42] <Randomskk> ftdi dongle will do
[22:42] <Upu> one of the good things is you can turn the front volume right down and still get the signal through to your PC
[22:43] <fsphil-laptop> yes it's brilliant for that Upu
[22:43] <jonsowman> hmm okay
[22:43] <Upu> but Robs cable does that too
[22:43] <fsphil-laptop> the interfaces have a lot of isolation, I think that's the only advantage
[22:43] <fsphil-laptop> for 70cm that might not be so important
[22:45] <Upu> the digimaster is good if you want to play with transmission of data modes
[22:45] <jonsowman> there are a couple of interface cables from the states with the FTDI chipset
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[22:46] <jonsowman> Upu: yeah it does looks very neat
[22:46] <Upu> oh fsphil http://www.g4zlp.co.uk/unified/DigiMaster%20ProTwo.shtml
[22:46] <Upu> sound card built in
[22:47] <Upu> jonsowman http://www.g4zlp.co.uk/unified/YaesuCAT.shtml
[22:48] <Upu> will be something under that that does what you want
[22:48] <fsphil-laptop> bah, I knew he'd make one after I bought the last one!
[22:48] <jonsowman> thanks Upu
[22:48] <fsphil-laptop> but no way it should cost £120
[22:49] <jonsowman> the top one (£25) looks alright
[22:49] <jonsowman> as long as it uses the ftdi chipset
[22:49] <Upu> it does
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[22:50] <jonsowman> oh yes it does say under spec
[22:50] <Upu> Based on FTDI's 232 chip for maximum performance and reliability and compatibility.
[22:50] <jonsowman> :)
[22:50] <jonsowman> nice pretty case
[22:50] <Upu> they are solid and well built
[22:51] <Upu> just watch they key up the radio, well mine does on boot
[22:51] <fsphil-laptop> yea, linux does that too
[22:51] <Upu> so watch if you have any preamps on
[22:51] <fsphil-laptop> I leave the radio on broadcast FM when setting things up
[22:52] <jonsowman> cool
[22:52] <jonsowman> £30 inc
[22:53] <jonsowman> or i could make a cable
[22:53] <jonsowman> hmmm
[22:53] <Upu> fire Rob H a mail
[22:53] <Upu> he made one
[22:54] <jonsowman> will do, ta
[22:54] <Upu> you can make one using the manual
[22:54] <jonsowman> yeah just reading through the manual atm
[22:56] <Upu> http://kk7uq.com/html/download/FT817%20Setup%20RevA.pdf page 4
[22:57] <jonsowman> :D
[22:57] <jonsowman> brilliant
[22:57] <jonsowman> thanks
[22:58] <Upu> welcome
[22:58] <Upu> right bed time nn
[22:58] <jonsowman> see you
[23:01] <Matt_soton> jonsowman: found somewhere to put the ft?
[23:01] <jonsowman> Matt_soton: ?
[23:01] <Matt_soton> you want the cable?
[23:02] <jonsowman> oh, no
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[23:02] <Matt_soton> have you got somewhere to put it remotely controled?
[23:02] <jonsowman> i just bought an 817 :)
[23:02] <Matt_soton> oh nice :P
[23:02] <Matt_soton> ebay?
[23:02] <jonsowman> indeed
[23:02] <Matt_soton> ££?
[23:02] <jonsowman> £300
[23:02] <jonsowman> inc everything
[23:02] <Matt_soton> wow
[23:02] <jonsowman> ntb i thought
[23:03] <Matt_soton> buy it now or bidding?
[23:03] <jonsowman> bidding
[23:03] <jonsowman> Matt_soton: http://www.ebay.co.uk/itm/330709176566
[23:04] <jonsowman> i'm picking it up on monday so no postage
[23:04] <Matt_soton> was just going to ask :)
[23:04] <fsphil-laptop> night all
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[23:04] <Matt_soton> why did that one go that much cheaper :\
[23:04] <jonsowman> idk
[23:04] <Matt_soton> everyone bought an ft who wants one?
[23:05] <jonsowman> i contacted him and asked about antennas/psu/strap/blah, and he said it does come with everything it originally came with
[23:05] <jonsowman> even though it doesn't say so in the listing
[23:05] <Matt_soton> tbh make a
[23:05] <Matt_soton> ..
[23:05] <jonsowman> maybe that put people off
[23:05] <Matt_soton> Li+ replacement battery thing
[23:06] <jonsowman> yeah
[23:06] <jonsowman> seriously consdering it
[23:06] <Matt_soton> should be a nice simple project
[23:06] <jonsowman> yep
[23:06] <jonsowman> may also make up a rig control cable
[23:06] <jonsowman> or i'll just not bother and buy one
[23:06] <jonsowman> we'll see
[23:06] <Matt_soton> im not too sure if i need a ft really, astra one is set up very well
[23:06] <Matt_soton> its so good i can even test using it a km or so away through houses
[23:07] <jonsowman> :)
[23:07] <jonsowman> yeah we definitely have to look into setting something on the cued roof
[23:07] <jonsowman> after exams we will persue that
[23:07] <Matt_soton> ecs will let you use the roof for a project, why wont they
[23:07] <jonsowman> between cusf and astra we'll have south of england covered ;)
[23:08] <Matt_soton> astra owns everything in the surrounding area (except the blind spot)
[23:08] <Matt_soton> not that anythings flown that way yet
[23:08] <jonsowman> :)
[23:08] <Matt_soton> i say that the poole listeners do good too
[23:09] <Matt_soton> i think i might get a e4k based thing first, partly due to the 869 band
[23:09] <jonsowman> there are some people around with crazy antenna setups
[23:10] <Matt_soton> well you saw that image of the 4x phased yagi array ontop of faraday
[23:10] <Matt_soton> that must have owned everything
[23:10] <jonsowman> yeah
[23:11] <jonsowman> collinears are surprisingly good though
[23:11] <Matt_soton> i think ben will be annoyed at you for that 300 817 mind you
[23:11] <jonsowman> was he after one?
[23:11] <Matt_soton> he was in the same way you were
[23:11] <Matt_soton> couldnt justify the money
[23:12] <Matt_soton> but you basically stole that
[23:12] <jonsowman> lol
[23:12] <jonsowman> i couldn't justify £500 on a new one, but £300 i thought was acceptable
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[23:17] <Matt_soton> tbh the e4k based stuff is reducing the need for a ft
[23:17] <Matt_soton> to an extent
[23:18] <jonsowman> agreed
[23:18] <jonsowman> there's always something to be said for an 'actual' radio perhaps
[23:18] <Matt_soton> cant uplink on a e4k
[23:18] <jonsowman> yeah
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[23:19] <jonsowman> i think when i'm working in the summer i'm going to grab a collinear and a rig control cable
[23:19] <Matt_soton> rival apexhab?
[23:19] <Matt_soton> seems pointless them being so close
[23:19] <Matt_soton> put it up in devon or somewhere like that
[23:19] <jonsowman> well it's not a competition, but i'd like a tracking station that can hear most HABs
[23:20] <Matt_soton> also you having a radio lessens the need for me to have one :P
[23:20] <Matt_soton> i have a scope instead
[23:20] <jonsowman> haha yeah
[23:20] <jonsowman> i'll borrow your scope and you can have the radio when you need it
[23:20] <Matt_soton> seems fine
[23:21] <Matt_soton> i wonder if you signal analyser works with android tablets
[23:21] <Matt_soton> theres fpga sim apps
[23:21] <Matt_soton> was a bit weird
[23:21] <jonsowman> hehe
[23:21] <jonsowman> have you got angruy birds in space yet?
[23:21] <Matt_soton> na only just wiped it again
[23:21] <Matt_soton> not that i did b4 hand
[23:22] <jonsowman> oh yeah
[23:22] <jonsowman> is the wifi thing sorted?
[23:22] <Matt_soton> yea
[23:22] <Matt_soton> well not really sorted
[23:22] <jonsowman> temporarily fixed
[23:22] <Matt_soton> also if i block ads.google.com in dns will that get rid of ads in android? :P
[23:23] <Matt_soton> domain maybe wrong ^
[23:23] <jonsowman> lol i've no idea actually
[23:27] <jonsowman> might have to get a magmount whip as well for chasing
[23:28] <kristianpaul> found it http://breadpig.com/collections/publiclaboratory/products/balloon-mapping-kit !
[23:28] <kristianpaul> "A 5.5 foot (170cm) reusable balloon made of a latex/chloroprene (neoprene) mix"
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[00:00] --- Sat Apr 7 2012