highaltitude.log.20131029

[00:02] <Laurenceb__> http://ihateyourhdr.tumblr.com/
[00:02] Nick change: KipK_away -> KipK
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[00:07] <DL7AD> now with 24h forecast http://dl7ad.de/balloons/D-2/
[00:07] <Lunar_Lander> DL7AD, cool!
[00:08] <Lunar_Lander> best of luck for this flight
[00:08] <Laurenceb__> is it using a AA lithium?
[00:08] <DL7AD> Lunar_Lander: thx
[00:08] <DL7AD> Laurenceb__: yes
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[00:09] <DL7AD> i will upload images tomorrow because im ill :/
[00:09] <Laurenceb__> whats the predicted battery life?
[00:09] <Laurenceb__> :(
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[00:10] <Lunar_Lander> oh
[00:10] <Lunar_Lander> get well soon!
[00:11] <DL7AD> hm.... never measured.... only measured it at -15°C and got 27h.
[00:11] <Laurenceb__> quite good
[00:11] <DL7AD> when i measured it, the pcb had an error.
[00:11] <DL7AD> so should be at least 27h. under very bad conditions
[00:12] <Laurenceb__> good luck
[00:12] <DL7AD> thx
[00:13] <DL7AD> im hoping that we can find some receivers in russia catching it
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[00:15] <Lunar_Lander> yea
[00:15] <Lunar_Lander> B-22 made it to the Ural mountains :)
[00:15] <DL7AD> and hope that i get rid off my cold soon... yes i want to reach ural as well
[00:17] <Lunar_Lander> :)
[00:17] <Lunar_Lander> LeoBodnar, I showed you website to a friend of mine earlier btw
[00:17] <DL7AD> Lunar_Lander: 170km/h :) genau so hab ich mir das vorgestellt.
[00:17] <Lunar_Lander> *your
[00:17] <Lunar_Lander> she was impressed
[00:18] <Lunar_Lander> and she will be impressed about D-1 and D-2 too I think DL7AD :)
[00:18] <Lunar_Lander> yay!
[00:18] <Lunar_Lander> DL7AD, mein professor freut sich immer wenn ich ihm die Trajektorien der B-Ballone zeige und D-1 fand er auch sehr interessant
[00:18] <DL7AD> Lunar_Lander: ging schon beim start schon wie ne rakete ab. glücklicherweise ist im westen ein berg... der gibt gut windschatten bis 30m höhe
[00:19] <Lunar_Lander> ja
[00:19] <Lunar_Lander> heute ist ja sturm simone
[00:19] <Lunar_Lander> oder so
[00:19] <DL7AD> ja irgendwie so
[00:21] <DL7AD> ich glaub hätt ich dieses mal wieder den stick genommen, hätt ich den ballon nicht sehr lange empfangen...
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[00:21] <Lunar_Lander> ja
[00:21] <DL7AD> Lunar_Lander: hatte mir extra fürs flugzeug den FT-290 gekauft :) ich finde das konzept cool
[00:22] <DL7AD> ich betreibe das gerät schon seit rund 12 stunden nur mit batterien.
[00:24] <Lunar_Lander> cool!
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[00:29] <DL7AD> okay good night
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[00:39] <Lunar_Lander> good night DL7AD
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[05:08] Nick change: danielsaul_alt -> danielsaul
[05:11] <DL7AD> good morning
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[05:27] <DL7AD> morning
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[05:46] <x-f> morning, night shift
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[05:49] <x-f> storm is getting weaker, electricity is back
[05:50] <x-f> sad to see that nobody got signals from D-2, it should be entering Russia about now :/
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[06:30] <UA1ASB> 145.300 control by ic-910 plus cushcraft 9 el. until l see.
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[07:45] Nick change: danielsaul -> danielsaul_alt
[07:45] Nick change: danielsaul_alt -> danielsaul
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[07:52] <ibanezmatt13> When people have linux-based OS's, do they use Ubuntu?
[07:53] <eroomde_> i do
[07:53] <ibanezmatt13> the free one?
[07:53] <eroomde_> unless you have a specific reason not to, and you want linux to get stuff done rather than to mess with linux, i'd go for ubuntu
[07:53] <eroomde_> yep
[07:53] <eroomde_> all free
[07:54] <ibanezmatt13> cool, I've always liked Linux, so thought I might try it
[07:54] <eroomde_> good plan
[07:54] <ibanezmatt13> Just trying to work out how to install it. It's a live CD thing
[07:54] <eroomde_> put the live cd in, done
[07:54] <eroomde_> however if you want to just play initially, you could try it inside a virtual machine
[07:55] <ibanezmatt13> well I'm downloading the .iso.
[07:55] <ibanezmatt13> but I don't have balnk CD
[07:55] <eroomde_> vm will work then
[07:55] <eroomde_> you can point the virtual machine to the iso on your hdd
[07:56] <ibanezmatt13> ok, never used a vm before
[07:56] <eroomde_> virtualbox
[07:56] <eroomde_> it's fairly easy to use
[07:57] <ibanezmatt13> Using a VM, won't I have to boot into Windows first to get on the interenet and load into the VM?
[07:59] <ibanezmatt13> I could run it off a pen drive I guess
[07:59] <eroomde_> pen drives are slow
[07:59] <ibanezmatt13> ah
[07:59] <eroomde_> if a vm, then yes you'll have to run it as an application in windows
[07:59] <eroomde_> however yes you can make a live USB disc
[08:00] <eroomde_> and install it from that
[08:00] <eroomde_> make sure you have everything on windows backed up though first :)
[08:00] <ibanezmatt13> yes, good idea
[08:01] <ibanezmatt13> everything is backed up
[08:01] <ibanezmatt13> Ideally, I would have liked to have a partition on my C drive with it on that I could choose to boot to
[08:01] <malgar> ibanezmatt13: are you talking about raspberry?
[08:02] <ibanezmatt13> nope, looking into getting Ubuntu on my PC
[08:02] <malgar> what OS do you install on the raspberry to use it on balllons?
[08:02] <malgar> ah ok
[08:02] <ibanezmatt13> Raspian?
[08:03] <daveake> Whichever you like
[08:04] <ibanezmatt13> Couldn't I just install it on the C drive?
[08:04] <ibanezmatt13> http://www.ubuntu.com/download/desktop/install-ubuntu-with-windows
[08:05] <eroomde_> yes
[08:05] <eroomde_> but back up windows, like i said
[08:05] <ibanezmatt13> yeah, everything's backed up
[08:05] <ibanezmatt13> there's pretty much nothing on it
[08:06] <eroomde_> ok, go for it
[08:06] <eroomde_> once you get it installed, open up a terminal
[08:06] <eroomde_> sudo apt-get install xchat
[08:06] <ibanezmatt13> ok, what is the server?
[08:06] <eroomde_> it'll prompt you for your password
[08:07] <eroomde_> that'll get you back on irc so you can start asking the 1000000000 questions you have
[08:07] <eroomde_> irc.freenode.net
[08:07] <ibanezmatt13> cool
[08:07] <ibanezmatt13> :)
[08:10] <DL1SGP> good morning
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[08:10] <ibanezmatt13> morning Felix :-)
[08:11] <x-f> DL7AD_, RN3DDW found D-2
[08:11] <DL1SGP> nice float DL7AD_
[08:12] <x-f> so it was 9 hours from Berlin to Moscow, not 12 :)
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[08:13] <wd8mnv> grats
[08:15] <ibanezmatt13> eroomde_: is there a particular installation size I should go for?
[08:16] <ibanezmatt13> ranges from 5GB to 30GB
[08:16] <eroomde_> is this for partitioning your existing hdd?
[08:16] <ibanezmatt13> yep
[08:16] <ibanezmatt13> 184GB free
[08:16] <eroomde_> i'd possibly do more that 30GB even
[08:16] <eroomde_> could you do 64 or something?
[08:17] <ibanezmatt13> only goes up to 30
[08:17] <ibanezmatt13> But I've seen a typical installation with 1GB
[08:17] <eroomde_> sure?
[08:17] <ibanezmatt13> yep
[08:17] <ibanezmatt13> won't let me go any more
[08:17] <eroomde_> odd
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[08:18] <ibanezmatt13> eroomde_: http://pbrd.co/Hd6bLN
[08:18] <eroomde_> you're definitely sure this is for the size of the partition
[08:18] <daveake> see http://ubuntuforums.org/archive/index.php/t-1650547.html
[08:19] <ibanezmatt13> not sure on that
[08:19] <eroomde_> ah
[08:19] <eroomde_> read adveake's link
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[08:20] <ibanezmatt13> ah
[08:22] <ibanezmatt13> So in other words, I should just do the C
[08:22] <ibanezmatt13> CD
[08:25] <ibanezmatt13> oh yes, bacon barm! brb
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[08:51] Nick change: danielsaul -> danielsaul_alt
[08:51] Nick change: danielsaul_alt -> danielsaul
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[09:07] <DL7AD_> okay whos going to find someone in perm?
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[09:09] <DL1SGP> you!
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[09:11] <UA1ASB> weakly...weakly..pic..pic only, no decode
[09:12] <DL1SGP> good morning UA1ASB
[09:12] <UA1ASB> cushcraft plus yaesu LNA direct SE
[09:12] <nats`> hi
[09:12] <DL1SGP> hi nats`
[09:12] <UA1ASB> hi all
[09:12] <nats`> still struggling with that crappy fx2 -_-
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[09:37] <Steve_G0TDJ_AFK> Good Morning HAB Folk :-)
[09:37] Nick change: Steve_G0TDJ_AFK -> Steve_G0TDJ
[09:37] <ibanezmatt13> Morning Steve_G0TDJ
[09:37] <Steve_G0TDJ> Hey Matt
[09:37] <ibanezmatt13> Posting today :)
[09:37] <nats`> hi
[09:37] <Steve_G0TDJ> Just got your e-mail Matt :-) Hi nats`
[09:38] <Steve_G0TDJ> Is Ed about?
[09:38] <ibanezmatt13> I've got the SD socket and PCB, but can't seem to find the spare ATMEGA328. So instead, I can give you a strip of 0805 LEDs of which there are two on the board
[09:38] <ibanezmatt13> Nah, he left just before :/
[09:38] <Steve_G0TDJ> :-) No worries Matt, thank you
[09:38] <ibanezmatt13> cool
[09:39] <Steve_G0TDJ> It's OK I'll catch him later. I did lots of work on VAYU-NTX last night after his advice
[09:39] <ibanezmatt13> Yeah, I couldn't keep up :P
[09:39] <Steve_G0TDJ> :-) Wanna peek?
[09:39] <ibanezmatt13> sure
[09:39] <Steve_G0TDJ> http://gerblook.org/pcb/8wZWcyPWVVdGpFZ6NtCLjk#front
[09:39] <ibanezmatt13> looking good. I see you've moved those caps closer to the pins
[09:40] <wd8mnv> what's the J2 sodket do?
[09:40] <Steve_G0TDJ> Yeah, apparently it's more improtant than I imagined
[09:40] <wd8mnv> socket
[09:40] <Steve_G0TDJ> J2 is for expansion, it breaks out lots of ATMEGA pins
[09:40] <wd8mnv> k
[09:40] <ibanezmatt13> just one thing, watch out for getting the writing on the pads. I got my first boards with half the letter missing because of that :p
[09:41] <Steve_G0TDJ> I'm going to design a companion board that plugs on to it for prototyping...
[09:41] <Steve_G0TDJ> Yes, Matt, I've yet to sort the Silk screen layer out
[09:41] <ibanezmatt13> cool, and are you happy with a vertical NTX2?
[09:41] <Steve_G0TDJ> All the text needs resizing and vectorising
[09:41] <Steve_G0TDJ> Yes, is there an issue with that?
[09:41] <ibanezmatt13> nope
[09:41] <ibanezmatt13> just a matter of preference :)
[09:41] <Steve_G0TDJ> It was a space saving measure
[09:42] <ibanezmatt13> :)
[09:42] <mfa298_> if that's decoupling caps then it's important to get them close to the device they're for, they're there to provide the bursts of power needed when switching.
[09:42] <Steve_G0TDJ> In fact, that prompted the whols redesign, having the output pin facing downwards
[09:42] Nick change: mfa298_ -> mfa298
[09:43] <Steve_G0TDJ> mfa298 Good explanation
[09:43] <ibanezmatt13> neat tracks too
[09:43] <Steve_G0TDJ> Thank Matt
[09:43] <ibanezmatt13> you sure you want one of mine :p
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[09:43] <Steve_G0TDJ> He he... Yes
[09:43] <ibanezmatt13> lol, cool :)
[09:43] <Steve_G0TDJ> I'll fly it sometime
[09:44] <ibanezmatt13> That'd be good to se
[09:44] <ibanezmatt13> see*
[09:44] <Steve_G0TDJ> You can have a VAYU if you like
[09:44] <ibanezmatt13> sure, why not :)
[09:44] <mfa298> that circuit theory module at uni now starts to make sense (when you realise that your wire also has some resistance/capacitance/inductance)
[09:44] <Steve_G0TDJ> Oh I so wish I had done Uni
[09:44] <ibanezmatt13> right, I'm off to the post office, see you :)
[09:44] <Steve_G0TDJ> Matt, sendme an e-mail and I'll post it, maybe even today. Might be popping out later.
[09:45] <ibanezmatt13> oh cool, I'll send it now
[09:45] <Steve_G0TDJ> Roger that
[09:45] <DL1SGP> heh morning Steve
[09:45] <Steve_G0TDJ> Hey Felix, Morning
[09:46] <DL1SGP> all going fine over there?
[09:46] <ibanezmatt13> sent
[09:46] <Steve_G0TDJ> The weather is nice at least Felix :-)
[09:46] <Steve_G0TDJ> OK Matt
[09:46] <ibanezmatt13> afk
[09:46] <ibanezmatt13> see yiou
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[09:47] <Steve_G0TDJ> Right, gonna grab a cuppa on this nice morning - brb
[09:47] <DL1SGP> ah we had luck with our morning walk, no weather is not that nice any more. actually gusts are taking up same speed as they were showing yesterday and average winds are higher
[09:47] <DL1SGP> enjoy Steve_G0TDJ
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[10:02] <Steve_G0TDJ> THanks Felix, it's a good cuppa :-)
[10:02] <Steve_G0TDJ> Morning ed__
[10:02] <ed__> morning Steve_G0TDJ
[10:03] <Steve_G0TDJ> Have you got a couple of ticks to scan over the new board please?
[10:03] <ed__> sure thing
[10:03] <Steve_G0TDJ> http://gerblook.org/pcb/8wZWcyPWVVdGpFZ6NtCLjk#front
[10:04] <ed__> that looks *much* better
[10:05] <ed__> that switcher layout is great, you'll get much less switching noise injected into the rest of the system with that
[10:05] <Steve_G0TDJ> Coolio :-)
[10:05] <ed__> lovely work
[10:05] <Steve_G0TDJ> I placed the GPS antenna exactly 1mm away from the GP as the datasheet advises (and you)
[10:05] <Steve_G0TDJ> Thank you Ed
[10:06] <ed__> my only other random thought is that with the mounting holes, you might not be able to get a screw in there if that's what you were planning
[10:06] <Steve_G0TDJ> Your advice will be very useful for future projects, thanks
[10:06] <ed__> because the head of the screw is larger diameter than the main diameter of the screw
[10:06] <Steve_G0TDJ> I thought it unlikely that I'd screw it down. More for string suspension
[10:07] <ed__> ah righty yes
[10:07] <ed__> in that case, splendid
[10:07] <Steve_G0TDJ> :-)
[10:07] <Steve_G0TDJ> I just have to sort the text out now
[10:08] <ed__> the pin map is a nice touch
[10:08] <ed__> i usually forget to do things like that
[10:09] <Steve_G0TDJ> Well, I remembered the small tables on hard drives back in the day for jumpers and I thought that if I could utilise the space it would be useful
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[10:09] <Steve_G0TDJ> Plus it will remind me LOL
[10:10] <ed__> :)
[10:10] <Steve_G0TDJ> I must shove the table up a ways. Balance it up with my logo
[10:10] <DL1SGP> heh, "sanity check table"
[10:10] <Steve_G0TDJ> :-)
[10:11] <ed__> DL1SGP, seriously!
[10:11] <Steve_G0TDJ> It's funny, I've been involved in graphic design (in an amateur way) for a long time but I still find it hard to work with stuff that reads backwards
[10:11] <ed__> the number of times i've had a pcb and just wanted to quickly attach a scope probe to ground
[10:11] <ed__> and actually had to check what's ground
[10:11] <ed__> in the pcb editor
[10:11] <ed__> my convention for headers is to make the first pin vcc and the last pin ground
[10:11] <Steve_G0TDJ> I'm chuffed the table is that useful :-)
[10:12] <ed__> but then you get annoying things like ftdi headers that don't obey that
[10:12] <Steve_G0TDJ> I'll remember that for future ed__
[10:12] Nick change: KipK_away -> KipK
[10:12] <DL1SGP> also if some geek finds your payload before you do it will make back engineering easier Steve_G0TDJ :D
[10:12] <ed__> Steve_G0TDJ, it's more for single row ones
[10:12] <ed__> double row is more anything goes
[10:13] <Steve_G0TDJ> LOL Felix... It's an open design anyway. It'll go on my website
[10:13] <ed__> often with double-row headers, you might hve say a bunch of analog signals
[10:13] <DL1SGP> yeah but google is less fun :)
[10:13] <ed__> and for reasons if good emi resistence, in the ribon cable you want:
[10:13] <ed__> signal-gnd-sig-gnd-sig-gnd-sig-gnd etc
[10:13] <x-f> (wrong window, sorry)
[10:13] <ed__> which manifestes itself on a double row header as one entire row being solid gnd
[10:13] <Steve_G0TDJ> I'm going to design a small prototyping module that mounts onto the header
[10:14] <ed__> x-f, that was meta
[10:14] <ed__> eg on the left here for one of my adc cards
[10:14] <ed__> https://www.dropbox.com/s/mosx39gpflbwdio/eaglescreencap.png
[10:15] <Steve_G0TDJ> Like the ones you can get with mutiple rows of pads
[10:15] <Steve_G0TDJ> Wow, that must have been some construction or was it machine made?
[10:15] <ed__> i soldered it up myself
[10:16] <ed__> it was on the tedious side
[10:16] <Steve_G0TDJ> a LONG job I bet
[10:16] <Steve_G0TDJ> I meant to ask, that is Eagle yes?
[10:16] <ed__> https://www.dropbox.com/s/4aixgwq3poojom8/daqlayer.JPG
[10:16] <ed__> yep that's eagle
[10:16] <Steve_G0TDJ> Nice..... How do you get the pads to go yellow like that. It makes them really easy to see
[10:17] <ed__> layer editor
[10:17] <ed__> the layer button on the left
[10:17] <ed__> click it, scroll down to tDocu, double-click on the colour square, and change it to yellow
[10:18] <Steve_G0TDJ> Magic :-)
[10:18] <ed__> i thinks it's tDocu anyway
[10:18] <ed__> one of the t's
[10:18] <Steve_G0TDJ> It is
[10:18] <ed__> cool
[10:18] <Steve_G0TDJ> That's a lont clearer, thanks
[10:18] <ed__> yeah it does make it a bit easier to see what's what doesn't it
[10:18] <Steve_G0TDJ> I hadn't realised I@d been struggling with it until I saw your layout
[10:19] <ed__> especially when PCBs can be a bit of a complicated mess of spaghetti, i need all the help i can get to keep a clear idea of what's what in my head
[10:19] <Steve_G0TDJ> Same here.
[10:19] <Steve_G0TDJ> Strange how some components have got it wrong LOL
[10:20] <ed__> if you think soldering one of those up would be tedious, imagine how fun my week was when i made this
[10:20] <ed__> https://www.dropbox.com/s/7tyz7a6yw9caohm/loggertron.jpg
[10:20] <Steve_G0TDJ> *swoon* What IS it?
[10:21] <Hix> heh Loggertron
[10:21] <ed__> it's a 32 channel pressure logger
[10:21] <ed__> each of those things with a tube is a pressure sensor
[10:21] <ed__> it samples all 32 of them 1000 times a second
[10:22] <ed__> and spits it back over ethernet
[10:22] <Steve_G0TDJ> Made bespoke for someone/some project?
[10:22] <ed__> it's for a rocket engine
[10:22] <Steve_G0TDJ> Wow....
[10:22] <Steve_G0TDJ> Serious piece of kit
[10:22] <ed__> part of our research is in very expeirmental engines and rocket nozzles, and with this we can study exactly what the flow is doing all the way down the rocket nozzle
[10:22] <ed__> i'll find a pic of the nozzle, one sec
[10:23] <Hix> ed__ have you been listening to R4 at ~09:45 this week?
[10:23] <Babs> its like a multi storey carpark for microchips
[10:23] <ed__> http://i.imgur.com/xfQbNErh.jpg
[10:24] <Hix> ed__ http://goo.gl/n4NnrV
[10:24] <ed__> so you see all the little hoses coming vertically out of the top of the nozzle?
[10:24] <ed__> they plug into that unit
[10:24] <ed__> Hix, yep i have been
[10:24] <Hix> ok
[10:25] <RocketBoy> mmmm - nice rig
[10:25] <Steve_G0TDJ> Looks very complicated ed__
[10:25] <ed__> so with that setup we can see how us affecting the chamber pressure affects how well the flow sticks
[10:25] <ed__> it's designed to optimally expand at all altitudes
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[10:26] <Steve_G0TDJ> All your own work ed__ I mean the circuit and PCB
[10:26] <ed__> james designed the pcb on the left of that stack - the baords that carry the pressure sensors
[10:26] <ed__> i designed the adc card - the bit to the right of the stack
[10:27] <ed__> and i soldered the whole lot up
[10:27] <ed__> with thanks to radio 3 and coffee
[10:27] <Steve_G0TDJ> Teamwork... :-)
[10:27] <ed__> i also designed the ehternet interface card on the top
[10:27] <Hix> is it pitot static measurement or just absolute measurements in a grid?
[10:27] <ed__> but it's not that good and i want to redo it
[10:27] <ed__> absolute
[10:27] <Hix> k
[10:27] <Steve_G0TDJ> Do you use 'normal' soldering to make the board up. with an iron?
[10:28] <ed__> i'm a big convert to solder stencils
[10:28] <ed__> and an oven
[10:28] <Hix> what sort of pressure levels do you see at the nozzle
[10:28] <ed__> you get very good and consistent results
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[10:28] <ed__> Hix, it varies alond the chord
[10:28] <Steve_G0TDJ> I'd like to do that ed__ but I have a big lack of space here. Maybe in my next location.
[10:28] <ed__> i use an argos toaster oven
[10:28] <ed__> £19.99
[10:28] <Steve_G0TDJ> LOL
[10:29] <fsphil> works a treat
[10:29] <ed__> and a feedback controller to get the right temp profile which i got from pcb-pool
[10:29] <Steve_G0TDJ> Brilliant
[10:29] <Babs> Hey ed__ - what scale is that nozzle vs. where you need to get to?
[10:29] <ed__> i also use pcb-pool for the PCBs because they give you a free laser-cut stainless steel stencil
[10:29] <ed__> Babs, massively smaller
[10:29] <ed__> that was an experiment in understanding the fluid- and thermo-dynamics
[10:29] <Steve_G0TDJ> What's their pricing like ed__ ?
[10:29] <Babs> like 1/10th?
[10:30] <Babs> ooer fractions
[10:30] <Babs> I mean 0.1
[10:30] <Babs> ahem
[10:30] <ed__> dunno
[10:30] <ed__> Steve_G0TDJ, more than mitch
[10:30] <ed__> but not bad still
[10:30] <Steve_G0TDJ> I guessed that :-)
[10:30] <ed__> well, have a go, they have an online form
[10:30] <Steve_G0TDJ> Mitch used to do stencils but stopped for some reason
[10:30] <fsphil> price most likely
[10:31] <ed__> http://www.pcb-pool.com/ppuk/order_productconfiguration_js.html
[10:31] <Steve_G0TDJ> Probably, it's always money
[10:31] <ed__> Babs, i'm honestly not sure
[10:31] <Steve_G0TDJ> brb
[10:31] <ed__> so a sabre engine will produce 3 meganewtons of thrust
[10:31] <ed__> this engine was like 3kN
[10:31] <Laurenceb> ed__: how do you shove ADC samples out fast enough with AVR?!
[10:31] <ed__> Laurenceb, it's an xmega
[10:31] <Laurenceb> oh
[10:31] <ed__> so a few MBits was no prob
[10:31] <Laurenceb> i see
[10:31] <ed__> but i want to switch to arm and use the builtin ethernet
[10:31] <ed__> not the wiznet
[10:32] <Laurenceb> yeah, seems more sensible
[10:32] <Babs> what makes it copper-ish red?
[10:32] <Laurenceb> its copper
[10:32] <Babs> (please don't say its made of copper)
[10:32] <Babs> heh
[10:32] <Laurenceb> lol
[10:32] <fsphil> iron-y
[10:32] <Babs> arf
[10:32] <ed__> it is actually copper
[10:32] <Babs> oh. f.
[10:32] <ed__> we use copper for these test engines, because their thermal conductivity is great
[10:33] <wd8mnv> they're in Vacaville??
[10:33] <ed__> so we can fire them for like 3 seconds and the heat just gets absorbed
[10:33] <ed__> saves designing a whole active cooling system
[10:33] <ed__> which is off-piste when you're doing fluid dynamics research
[10:33] <Babs> ahh...ok. Like a good saucepan.
[10:33] <ed__> yeah
[10:33] <ed__> but it does mean you can only fire for about 3 seconds
[10:33] <ed__> but that's about 2.9 seconds longer than you could fire if it was made of stainless o titanium
[10:33] <ed__> they'd just melt instantly
[10:33] <wd8mnv> sometimes 3 seconds is all you need
[10:34] <ed__> badum ching
[10:34] <Babs> thats what she said
[10:34] <ed__> but yes, because we're using gas-gas propellents, the thing reaches equilibrium in about 200ms
[10:34] <wd8mnv> unless it's along burn... 10 seconds
[10:34] <Steve_G0TDJ> ed__: They are WAY above Mitch's prices
[10:34] <ed__> so that's plenty of steady-state data in 3 seconds, eith everything being sampled at kHz
[10:35] <ed__> Steve_G0TDJ, yup
[10:35] <Babs> as in it is emitting as much heat as it is taking in within 200ms?
[10:35] <ed__> though the economics if different for me doing it for business
[10:35] <Steve_G0TDJ> Of course
[10:35] <ed__> mitch's service isn't quite up to business usage
[10:35] <ed__> + the free stencil :)
[10:36] <ed__> Babs, i mean more the pressure coming up in the chamber
[10:36] <Steve_G0TDJ> No Mitch is but perfect for hobbyist, which is his market area
[10:36] <fsphil> stencil is nearly worth it if you're making more than 2
[10:36] <Babs> ahh. ok.
[10:36] <fsphil> definitly worth it if you're selling the end result :)
[10:36] <Steve_G0TDJ> It is if you can afford it fsphil :-)
[10:36] <ed__> we do have to account for all the energy going into the walls though
[10:37] <ed__> it affects our 'characteristic exhaust velocity efficiency' (or C* (see-star) efficiency)
[10:37] <Hix> Steve_G0TDJ tobe@smart-prototyping.com does stencils for a reasonable cost
[10:37] <Steve_G0TDJ> I'll have a look Adrian, cheers.
[10:38] <ed__> which is a ratio of how well the engine should perform just from a chemsitry point of view, vs how well it's actually performing, and it's the pressure at the throat multiplied by the throat area (so, a force), divided by the propellent mass flow
[10:38] <ed__> in other words, roughly how much force you're getting per unit mass of propellent - how much bang for your buck
[10:38] <ed__> there's a theoretical value for that calculated by old chemsitry fortran codes
[10:38] <ed__> and we measure it on the engine
[10:38] <ed__> and compare the two to get an efficiency
[10:39] <Babs> do you just count the hydrogen as propellant, or the oxygen too?
[10:39] <ed__> but you loose a lot of energy to the copper walls, so you have to correct for that - the walls are lined with thermocouples
[10:39] <ed__> both
[10:39] <Babs> ahhh ok, otherwise i would say you were doing yourself a disservice vs. the guys who take their oxygen up with them
[10:40] <ed__> yep
[10:40] <ed__> so a typical specific impulse (bang per buck for propellent mass) is like 350
[10:40] <ed__> oxygen+hydrogen is more like 450 - astonishingly good
[10:40] <ed__> but the sabre engine in airbreathing mode has an effective specific impulse of 3600
[10:41] <Hix> what about in firebreathing mode ;)
[10:41] <Hix> that is a bit of a step-change though
[10:41] <ed__> nearer 450
[10:41] <Hix> or rather an order of magnitude
[10:42] <ed__> as it's just oxygen/hydrogen at that stage
[10:43] <Babs> Wonder what specific impulse this thing had http://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion)
[10:44] <Babs> This talk by the great man's son is pretty good at mixing the science with the humour http://www.ted.com/talks/george_dyson_on_project_orion.html
[10:46] <ed__> orion isp apparently about 10^4
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[10:49] <Steve_G0TDJ> Hix: I'll keep them in mind for future stuff but I do like Mitch's service even sans stencil
[10:49] <Babs> wowsers. need a modified specific impulse equation to also factor in risks of mass extinction.
[10:50] <ed__> also that, yep
[10:50] <ed__> the sabre engine scares me enough
[10:51] <Hix> Steve_G0TDJ I still use Mitch for boards, just got a stencil from them
[10:51] <Steve_G0TDJ> Hix: you can order JUST the stencil?
[10:51] <Hix> yup
[10:51] <Steve_G0TDJ> Oh that is cool :-)
[10:51] <Hix> s'what I did
[10:52] <Steve_G0TDJ> I'll definitely look into that then
[10:52] <Hix> $37 inc shipping for >A3 sized stencil, which I panelised then cut up
[10:53] <Steve_G0TDJ> I think mine will be a lot smaller than that
[10:53] <Hix> though if you are into a bit of homebrew expermientation.... http://lowpowerlab.com/blog/2013/02/11/diy-smd-metal-stencils-the-definitive-tutorial/
[10:54] <Steve_G0TDJ> I saw that. I'd love to but again, it's the space or lack of I have here...
[10:54] <Steve_G0TDJ> Hoping to have a dedicated room next address
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[11:06] <DL7AD_> good afternoon
[11:06] <Steve_G0TDJ> Hiya
[11:12] <wd8mnv> needs to be a t-shirt " This device and it's associated parts are harmless and of no monetary value"
[11:14] <Steve_G0TDJ> :-) I could do that wd8mnv
[11:14] <Steve_G0TDJ> I have a Zazzle account http://www.zazzle.com/endstop
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[11:21] <Steve_G0TDJ> Hey hey Matthew :-)
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[11:21] <ibanezmatt13> Hey Steve, package posted :)
[11:21] <Steve_G0TDJ> Coolio, I'l sort yours out later
[11:21] <ibanezmatt13> excellent, thanks
[11:22] <Steve_G0TDJ> I'm just tidying my board's text
[11:22] <ibanezmatt13> good good :)
[11:22] <Steve_G0TDJ> Almost done.
[11:23] <ibanezmatt13> Steve_G0TDJ, I *may* at some point in the future get NORB 3 remade. If I do, I can remove the redundant TMP102, fix that SD socket, and have the logo on it :)
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[11:24] <Steve_G0TDJ> Yep, that's the thing to do. v*.01
[11:24] <ibanezmatt13> yep, probably for next summer's launch ;)
[11:24] <Steve_G0TDJ> How many did you have made?
[11:24] <ibanezmatt13> 10
[11:24] <Steve_G0TDJ> Same here
[11:24] <Steve_G0TDJ> I was very lucky, I got an extra two for free
[11:24] <ibanezmatt13> nice
[11:25] Nick change: DL7AD_ -> DL7AD
[11:25] <wd8mnv> i'm making a lamp
[11:26] <Steve_G0TDJ> A little 'light' work :-)
[11:27] <wd8mnv> more than a little... it's 10 Watts LED, and that's 10 watts 'key down' have it on an old LGA 775 heat sink and i still need to run the fan
[11:27] <Steve_G0TDJ> That's a lot for an LED isn't it?
[11:27] <Steve_G0TDJ> You building a lighthouse?
[11:28] <ibanezmatt13> lol
[11:28] <wd8mnv> they get much bigger... this one's rated 900 lumen
[11:28] <wd8mnv> roon lighting
[11:28] <wd8mnv> room
[11:28] <Steve_G0TDJ> Interesting
[11:29] <Steve_G0TDJ> More efficient than tungsten filament?
[11:29] <wd8mnv> yes... even better than compact floresent
[11:29] <Steve_G0TDJ> Nice
[11:29] <ibanezmatt13> Does anybody have any recommendations for turning a text file with a load of datastrings into a few graphs showing say temp vs time, and humidity vs time etc? I was initially using a Python module called "matplotlib" but it looks a little limited.
[11:29] <gonzo_> even the 3 watt ones really need the heatsink
[11:29] <gonzo_> played with them for light wave comms
[11:29] <adamgreig> ibanezmatt13: "limited"?!
[11:30] <ibanezmatt13> well, my knowledge is limited so I can't use it properly :)
[11:30] <adamgreig> matplotlib can literally make any plot you want including 3d volumetric visualisations
[11:30] <adamgreig> if you want something even more hardcore there's mayavi but I warn you it is not easy to use
[11:30] <adamgreig> what are you trying to do?
[11:30] <gonzo_> have a 20W, but that turns out to be a cluster of 25 chips on a substrate. No good for comms, but ideal as a beacon.
[11:30] <adamgreig> or rather, where did you get?
[11:30] <adamgreig> where did you get to*
[11:30] <ibanezmatt13> well I gave up whrn it wouldn't plot time properlu
[11:30] <adamgreig> this should be like, super duper simple
[11:31] <wd8mnv> the problem here is that the house i'm in may have some janky wiring... we get charged for kike 5 x to 10 x what i personally use a month,,, and since the overhead light burned out that power bill is less this month
[11:31] <adamgreig> ibanezmatt13: if you just use python datetime objects for your times it should plot them perfectly
[11:32] <ibanezmatt13> I made a program to read a file line by line, find the time and temperature for instance, then plot a graph. It plotted the graph ok but the time axis went up in integers and I couldn't figure how to get it in proper time
[11:32] <Steve_G0TDJ> wd8mnv: Perhaps you have a leak
[11:32] <wd8mnv> i want an e-peper display data logger
[11:32] <adamgreig> ibanezmatt13: well you basically just need to tell matplotlib they are times somehow or other
[11:32] <adamgreig> what were you feeding it for the time?
[11:32] <ibanezmatt13> 123445 formt
[11:32] <ibanezmatt13> format*
[11:32] <adamgreig> strings? unix timestamps? seconds since midnight? Python time objects?
[11:32] <adamgreig> that's... that's not a time, that's a big integer that increments weirdly
[11:32] <ed__> so you got nice big gaps between 60-100
[11:32] <ibanezmatt13> strins
[11:33] <ibanezmatt13> exactly ed
[11:33] <ed__> yes
[11:33] <wd8mnv> that's what i think,,, but then i have to prove it because the home owner can't figure it out
[11:33] <adamgreig> well yea
[11:33] <adamgreig> you can't do that
[11:33] <ed__> as adamgreig says, you need to convert it into something that it can understand
[11:33] <adamgreig> it can't magically know that 123456 is actually 12:34:56, a time
[11:33] <adamgreig> but you can just
[11:33] <adamgreig> from datetime import time
[11:33] <ibanezmatt13> can matplotlib accept time objects?
[11:33] <adamgreig> yes
[11:33] <ibanezmatt13> aah ok then
[11:34] <adamgreig> times.append(time(tstring[0:2], tstring[2:4], tstring[4:6]))
[11:34] <Laurenceb> ed__: maybe you could answer this
[11:34] <adamgreig> and then when you plt.plot(times, altitudes)
[11:34] <ed__> maybe
[11:34] <adamgreig> it should be fine
[11:34] <Laurenceb> im trying to thread some cable down flexible hose
[11:34] <ibanezmatt13> I see adamgreig yes. Thanks I'll get onto it
[11:34] <Laurenceb> is there a pro way to do this?
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[11:34] <ed__> not that i know of - is it being tricky?
[11:34] <Laurenceb> very
[11:34] <wd8mnv> there's a flexable wire thingy you can use
[11:34] <Laurenceb> i have 200m of this stuff to do :S
[11:35] <adamgreig> high pressure air?
[11:35] <Laurenceb> managing about 2mm/minute
[11:35] <ed__> oh wow
[11:35] <ed__> right
[11:35] <Laurenceb> yes
[11:35] <Laurenceb> pneumatics
[11:35] <ed__> that could be a lot of friction
[11:35] <adamgreig> I mean, use the air to push the cable
[11:35] <Laurenceb> yes
[11:35] <Laurenceb> yeah
[11:35] <ed__> one continuous 200m length?
[11:35] <adamgreig> 2mm a minute?!
[11:35] <adamgreig> is it like, similar diameters or what
[11:35] <Laurenceb> but how do i thread the cables in
[11:35] <ed__> and what is the iD of the tube and the oD of the cable?
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[11:35] <Laurenceb> tube is 3.2mm id
[11:35] <adamgreig> can you put some thin light cable on the front of your cable and just drop that all the way through the hose and pull through?
[11:36] <Laurenceb> cable 1.7mm OD
[11:36] <Laurenceb> adamgreig: thats how im doing it
[11:36] <Hix> Laurenceb what is the max length per run?
[11:36] <ed__> how long is one continuous length?
[11:36] <Laurenceb> 2m runs
[11:36] <Hix> right, get yourself down to a fishing shop
[11:36] <Laurenceb> the cables insulation keeps catching
[11:36] <ed__> tape it up
[11:36] <Hix> sec I'll link you to a product
[11:36] <Laurenceb> then as the insulation is flexible is tends to build up
[11:37] <Laurenceb> and cause a snag
[11:37] <Geoff-G8DHE-M> Laurenceb, Use a piece of cotton thread with a tiny parachute on the end, then blow it down the pipe, use this as a pull cable to pull in a the actual cable or perhaps a piece of string if its a heavy cable
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[11:37] <Hix> Laurenceb http://goo.gl/QwDDiw
[11:37] <Laurenceb> but how would i seal where the cable going into the tube?
[11:38] <Laurenceb> i might try some fairy liquid down the tube
[11:38] <Laurenceb> then fishing line
[11:38] <Hix> used to thread very low diameter [extremely awkward] silicone elastic down fishing poles
[11:38] <Laurenceb> seems worth a shot
[11:38] <Hix> fishing line is an arse, that rpoduct is very very capable
[11:38] <Laurenceb> yeah these a silicone signal cables (microflex)
[11:38] <Laurenceb> ok
[11:38] <Hix> get one of them they're ~£2-3
[11:39] <Laurenceb> hmm interesting bit of kit
[11:39] <Laurenceb> thanks for the link
[11:39] <Hix> used one for RC cable routing up a control snake tube
[11:39] <mfa298> this sort of thing is done with optical fibre now by using air to push it through a tube, but that might make sense for longer runs.
[11:40] <Laurenceb> turns out in reality its very hard to do right
[11:42] <Hix> go crazy get a 3m version http://goo.gl/qctX5F
[11:43] <mfa298> for a short length like that I'd probably use a piece of cotton/string with a suitable weight on as a drawline.
[11:43] <mfa298> and drop it through with the tube held vertically - let gravity do the work
[11:43] <Hix> Ø1.7mm though, the weight is the issue
[11:43] <Laurenceb> i think i worked out a technique
[11:44] <Laurenceb> by strengthing and clamping in the right sequence i can shift the cable ~3mm
[11:44] <Laurenceb> *stretch
[11:44] <Laurenceb> time to build a rig with a few bench vices
[11:44] <wd8mnv> if it's air tight... maybe suck it thru the other end?
[11:45] <Hix> you could also use a low Ø cycle gear cableand tape one end of the cable and draw it through
[11:45] <Laurenceb> yeah
[11:45] <Hix> pulling is >= pushing in this arena
[11:45] <Hix> think playing snooker witha length of rope
[11:46] <Hix> which is a euphemism I heard an old guy use once :)
[11:47] <Hix> them fishing pole threaders really are perfect though, you could prob solder runs together and do a massive 6m hit in one go
[11:48] <ed__> i need lunch already
[11:48] <ed__> hurry up time
[11:49] <Hix> which just made me think laurneceb http://goo.gl/pNvj2F is a really low Ø wire trace they use for toothed fish, 15m lengths, could be perfect
[11:49] <Hix> ~0.4mm
[11:49] <Hix> but very threadable [is a word now]
[11:50] <Hix> kind of stuff they use for control loops on large RC scale planes
[11:51] <Hix> actually, that last stuff I linked to could be very useful for general HAB purposes http://goo.gl/pNvj2F
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[11:58] <Hix> does latex make equations png by default? thought it was actual text in mathematical notation
[11:59] <ed__> it renders them in postscript
[11:59] <ed__> in the pdf
[11:59] <Hix> so they are generally images then?
[11:59] <ed__> png shouldn't be involved anywhere, it's all vector
[11:59] <ed__> well, they're equations :)
[12:00] <Hix> yeah, you know what I meant
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[12:00] <Hix> lack of lunch = pedant :D
[12:00] <ed__> they're not images in the same way the text isn't images
[12:00] <ed__> it's all just outputs from the tex rendering engine
[12:00] <ed__> different pdf readers maybe have different parsing abailities
[12:01] <ed__> for search and highlight, etc
[12:01] <ed__> but that's not really a distinction at the latex level
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[12:03] <Hix> lunbch biab
[12:03] <ed__> there do exist, btw, some things which render latex equations in different image formats
[12:08] <Laurenceb> inkscape...
[12:08] <Laurenceb> prob more pro ways
[12:28] <SpeedEvil> xfig
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[12:37] <Andrew_M6GTG> Afternoon, just a heads up SSTV on ISS was reported as operational earlier, passes at 12:43, 14:20 and 15:56 today over UK, you never know it might still be working 145.800MHz FM
[12:38] <malgar> sstv on iss? :O
[12:38] <ed__> Willdude123, ^^^
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[12:38] <fsphil> they totally need some kind of digital mode
[12:38] <Andrew_M6GTG> malgar: yes, they point it out the windows ;-)
[12:39] <Andrew_M6GTG> fsphil: Well they have the HAM-TV setup for use soon ;-)
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[12:40] <Willdude123> ed__, will a 1/4 wave for 70cm do the trick? That's all I have, aside from long wire
[12:40] <Willdude123> The long wire is disconnected from the coax.
[12:40] <Willdude123> Actually, the connector on the other end of my coax is disconnected too.
[12:41] <Hix> see the BBC are at the cutting edge of aerial technology
[12:41] <Hix> http://goo.gl/YY4egi
[12:41] <Willdude123> So unfortunately, I'd have to solder it back on
[12:41] <craag> Andrew_M6GTG: I would really like to get something set up for that. Steering a >1.2m dish isn't easy though!
[12:41] <malgar> At the moment I just have the small default antenna of the rtl-sdr. Is it enough?
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[12:41] <Darkside> no
[12:41] <ed__> Willdude123, i'm afriad i'm unsure
[12:41] <ed__> give it a whirl
[12:41] <malgar> what should I need?
[12:42] <Willdude123> ed__, just gotta have lunch, go next door and borrow some solder, find my coax connector and wire it up
[12:42] <Andrew_M6GTG> malgar: It is quite a strong signal when overheadish so might get something, software MMSSTV
[12:43] <ed__> good luck
[12:43] <Willdude123> Also, what position is it in the sky? I probably won't have LoS
[12:43] <ed__> have a look on heavens-above.com
[12:43] <ed__> enter your lat/lon
[12:43] <fsphil> it moves
[12:43] <ed__> then look for ISS passes link
[12:43] <ed__> and it'll tell you its path over your head
[12:44] <fsphil> I think it's overhead now
[12:44] <mfa298> Willdude123: ideally you want something a bit bigger than thr 70cms gp antenna
[12:45] <Andrew_M6GTG> http://www.issfanclub.com/ shows current position
[12:45] <fsphil> worth a try if it's all you have
[12:45] <mfa298> if you made something similar but with 50cm elements that could work (although it will be deaf if the iss is directly overhead)
[12:46] <mfa298> if you've got some spare wire and coax make a simple dipole, I've heard arps from the iss with something similar
[12:46] <Andrew_M6GTG> Not looking promising APRS beacon active :-(
[12:46] <Willdude123> On second thoughts, I don't think I'll be able to find the coax connector. Finding a small connector in a room with a load of components indiscriminately sorted into containers by my mother may well be difficult
[12:49] <Willdude123> Found it, now to find a way to solder coax connectors
[12:49] <ed__> *right* overhead at 2.30
[12:49] <ed__> 89 degrees from oxford
[12:49] <Willdude123> Are people making ham contacts as it goes over? Is it worth listening on the voice downlink?
[12:50] <ed__> unsure
[12:50] <mfa298> soldering coax connectors is easy/hard depending on the type of coax and the connector
[12:50] <DL7AD> Hix: interesting... think they also use this technology at german tv already
[12:50] <Steve_G0TDJ> SSTV on 145.800
[12:51] <Hix> DL7AD they are sooo far behind the curve it really is amusing me
[12:51] <Willdude123> So239 onto RG598
[12:51] <Andrew_M6GTG> SSTV would be on the voice downlink 145.800, current pass has APRS digipeater active on 145.825 so no SSTV :-(
[12:51] <Steve_G0TDJ> It's there Andy
[12:51] <Hix> Babs did you see the link earlier?
[12:51] <Babs> Afternoon Hix - which one?
[12:51] <Andrew_M6GTG> yes, just as I type that it is on!
[12:51] <Steve_G0TDJ> :-)
[12:51] <Andrew_M6GTG> damn italian astronaut
[12:52] <Steve_G0TDJ> First time I've heard it. Wasn't in place to decode or record
[12:52] <Hix> Babs http://goo.gl/YY4egi
[12:52] <Hix> pushing the boundaries of tech eh Babs
[12:52] <Babs> pah. that gimbal is ugly.
[12:52] <Babs> erm. but it does work.
[12:53] <mfa298> Rg58 onto pl259 should be fairly easy if that's what you mean. (pl259 is the plug, so239 is the socket)
[12:53] <Willdude123> My bedroom's heading is west so should be OK
[12:53] <Willdude123> Yeah
[12:53] <Babs> but i get my aluminium parts in a couple of days, I have the motors and the carbon fibre and THEN I WILL RULE THE GIMBAL WORLD Hix
[12:53] <Hix> but c'mon, how long have they had to be using this? its been around for ages
[12:53] <Andrew_M6GTG> Normally don't operate both transceivers..
[12:53] <Willdude123> So do I just get some very hot solder onto the tip of the copper then put it in?
[12:54] <Hix> Babs cool - so its all about to come together?
[12:54] <Hix> Lee doing alu~?
[12:54] <Babs> Yes, I am about to become George Peppard and buy a cigar.
[12:54] <Babs> Yes, Lee is doing it but he is quite busy at the mo
[12:54] <Hix> heh Victor Kayam
[12:54] <Babs> he was doing them at the end of last week, I probably need to follow up
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[12:54] <mfa298> Willdude123: normally you strip the coax enough so you can push the coax inside, and then apply solder to the accessible end of the pin
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[12:55] <mfa298> if it's a pre-used pl259 your options might be harder
[12:55] <Babs> You found me some good suppliers, cheers for that
[12:55] <Willdude123> I'm confused.
[12:55] <Willdude123> The wire is stripped back,
[12:56] <M6PFX-Paul> ISS is sending SSTV
[12:56] <Willdude123> So once the wire is in, then how do I solder it, it's quite far in
[12:57] <Hix> nps babs glad to impart some of my knowledge somewhere instead of being the drain i normally am :)
[12:58] <Hix> Babs got any decent pics of the CFRP?
[13:00] <Willdude123> Might have to give this one a miss
[13:00] <ed__> new rule along with the other ones in edland
[13:01] <mfa298> Willdude123: this looks like it might show you how to do it http://www.youtube.com/watch?v=anPhX5nkICU
[13:01] <ed__> if anyone describes themselves on a public-facing thing (say, a twitter handle), in a manner like the following: 'Entrepeneur. Philosopher. Poet. Father.' then they should legally required to have the suffiix 'C*nt.' attached
[13:01] <Willdude123> Right, the tip of my coax had solder on it.
[13:01] <Willdude123> Will take that off
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[13:04] <Hix> ed__ hows your stance on people who feel the need to add every letter they can possibly add after their name to an email signature
[13:04] <ed__> same rule should apply maybe
[13:04] <ed__> my business vard just has my name and the company contact details
[13:05] <ed__> i've always found the letters a bit naff
[13:05] <Hix> I would like stoning persoanlly, it's more effective
[13:05] <Hix> as by virtue of what these people have done you know they are a c%^t already as does everyone else
[13:05] <ed__> when people do that it, to me, reads like one of those charlatan self-helf books that americans like
[13:05] <Hix> Snake oil by chares E Kruger XIII
[13:05] <ed__> Wowza: Or How I made everyone around me give me $100 and their time, by Stephen C
[13:06] <ed__> er
[13:06] <ed__> Stephen F. Uckwit, Ph.D
[13:06] <ed__> hit enter a bit too soon
[13:06] <Hix> rage enter :)
[13:06] <ed__> there is also another obsession in american publishing
[13:06] <ed__> which also looks like bollocks to me
[13:07] <ed__> where book titles take the form
[13:07] <ed__> [AbstractPunchPhrase]:[A slighty-too-long subtitle explaining it]
[13:07] <Babs> Hix - on my flickr stream, do you have the link?
[13:08] <Hix> I'll find it easily enough Babs I have a friend in the NSA ;p
[13:08] <ed__> also WhyTF do people give malolm gladwell the time of day
[13:09] <ed__> he seems to be a priest for the epistemically challenged
[13:09] <Babs> Hix - have already worked out that I can replace the metal bolts with plastic ones I sourced and its still strong
[13:09] <Hix> Babs good man - full res images :)
[13:09] <Babs> have you ever used an eos m hix?
[13:09] <ed__> hah!
[13:09] <Hix> nope - I'm a Nikon user
[13:09] <ed__> i wondered what was likely to dig up the worst kind of bullshit publishing
[13:10] <ed__> so i typed 'best selling management books usa'
[13:10] <ed__> voila
[13:10] <ed__> http://www.amazon.com/Best-Sellers-Books-Business-Management-Leadership/zgbs/books/2675
[13:10] <ed__> look the the top 6
[13:10] <ed__> 5 of themdo the stupid title thing
[13:10] <ed__> including one by malcolm gladwell
[13:10] <ed__> i basically rest my case
[13:10] <adamgreig> lol
[13:11] <Hix> ed__ http://goo.gl/KJQNL
[13:11] <ed__> infact they're all like that
[13:11] <ed__> why don't these people just put a revolver in their mouths
[13:11] <ed__> jeebus
[13:11] <Babs> Hix - trying to decide what camera to use. The DSLR just seems to add unnecessary weight for no real difference in result, but I do like the fact that the eos m has a pancake lens and runs magic lantern
[13:11] <adamgreig> because they can make a shitton of money selling crap books?
[13:11] <adamgreig> they're probably having a great time
[13:11] <ed__> there is a good essay i read a couple of years ago
[13:11] <Babs> the best business books are written by guys in the military
[13:12] <ed__> which basically put into words all of my anguish with the culture of youngish, technological people
[13:12] <Babs> "think about things for a while, and then just do it"
[13:12] <Babs> "with guns"
[13:12] <ed__> it was called 'The Naked and the TED' by evgeny morozov
[13:12] <ed__> mozarov
[13:12] <ed__> i don't remember
[13:12] <ed__> that one
[13:12] <ed__> read it
[13:13] Nick change: Guest44339 -> nigelvh
[13:13] <adamgreig> you should follow @pinboard, you'd probs enjoy
[13:13] <Hix> Babs the "pancake" lens is 35mm equiv so maybe a little narrow fov?
[13:14] <adamgreig> best snark commentary on the entire stupid tech industry
[13:14] <ed__> ok
[13:14] <ed__> but read that review
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[13:15] <adamgreig> I like how I load that page
[13:15] <Babs> I think i read its a wide angle hix?
[13:15] <adamgreig> and get a popover ad
[13:15] <adamgreig> "Are we stuck with dysfunction?"
[13:15] <adamgreig> "sign up for exclusive updates and offers"
[13:15] <adamgreig> "find out why right-wing populism could hobble America for decades"
[13:15] <adamgreig> you can't win with this
[13:15] <Hix> Babs wide angle would be <28mm equivalent really. ideally 24 or 20mm
[13:17] <ed__> click the x
[13:18] <adamgreig> lol well yes
[13:19] <Hix> Babs have the bolt holes delaminated slightly? http://www.flickr.com/photos/91049302@N00/10474250475/lightbox/
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[13:21] <Babs> a little. something i haven't worked out is that when the parts came back, the 3mm bolt holes I had in were 0.25mm shy of being 3mm. it didn't happen with the aluminium parts, so I know it isn't my measurements
[13:21] <Babs> my feeling is that the holes were machined out with a 1mm tool say, rather than drilled out, and the tolerances were set up on the machine a little wrong
[13:21] <Babs> I know lee drilled the holes out with a 3mm drill
[13:22] <Babs> so anyway, to cut a long story short I drilled them out with a 3mm drill as sending them back to be redrilled would be too much of a faff
[13:22] <Babs> there isn't a whole load of strain on those holes anyway as there are so many of them so i should be ok
[13:22] <Hix> hmm, interesting, can you check any of the other diimensions? I know that CFRP monsters cutting tools, they could have worn and not been corrected for, though 0.25mm is a big error
[13:23] <malgar> is true that Upu UpuWork can exactly reproduce an rtty signal using his voice?
[13:23] <adamgreig> I heard he can decode RTTY in his head
[13:23] <Babs> it may be less, it is more that I couldn't shove a bolt through it so i know it was more than 0.05mm put it that way
[13:24] <Babs> Upu is like a HAM radio version of parseltongue
[13:25] <Hix> Babs you could try reaming your hole http://goo.gl/IQjFnc [so to speak]
[13:26] <ed__> after working on a payload for a while on the bench you can certainly here if there's a gps lock or not from the rtty
[13:26] <Babs> that would have been good to know before i drilled them out. thanks hix, next time (if there is a next time) i will either get one or the holes made wider.
[13:26] <fsphil> that's true
[13:26] <fsphil> you can also hear the difference between text and image data
[13:27] <Hix> babs or just ask him to MTFD
[13:27] <Babs> ahh, another day, another acronym i don't understand
[13:28] <Hix> make to ... drawing ;p
[13:30] <UpuWork> lol
[13:30] Action: UpuWork goes back to sleep
[13:31] <adamgreig> when matt gets back someone tell him to use datetime not time and see if that works
[13:38] <adamgreig> eroomde: on that general theme I read some good laments on the state of computing last night, starting with http://exple.tive.org/blarg/2013/10/22/citation-needed/ and moving to http://www.loper-os.org/?p=861
[13:38] <ed__> ok adding to the list
[13:38] <ed__> not gonna get much work done this arvo methinks
[13:38] <ed__> how is the lab?
[13:38] <adamgreig> good. quiet. lunch time seems to be shifting towards 1340 to 1400 _start_
[13:38] <adamgreig> getting hungry
[13:39] <adamgreig> starting to fill out a bit now we have that transfer from coombs and a few second years coming back to their desks
[13:39] <adamgreig> the practical optimisation 4M17 coursework is.. hard
[13:40] <ed__> what is it?
[13:40] <adamgreig> "practical" optimisation
[13:41] <adamgreig> various methods for local and global minimisation of a variety of problems
[13:41] <ed__> i did the next lesson of that udacity thing over breakfast
[13:41] <ed__> it's actually got better
[13:41] <adamgreig> oh cool
[13:41] <adamgreig> I might toy with some of them
[13:41] <adamgreig> might go to lunch soon too... hm
[13:41] <ed__> dynamic step sizing for numerical solvers for ODEs
[13:41] <adamgreig> cute
[13:41] <Hix> this the cs222 again?
[13:41] <ed__> which is more in degree territory
[13:41] <adamgreig> I recall doing a bit of that
[13:41] <ed__> yeah
[13:42] <ed__> i don't actually recall every doing numerical solvers
[13:42] <ed__> i mean
[13:42] <ed__> i somehow know about them
[13:42] <adamgreig> that would be too practical
[13:42] <ed__> but i don't remember it ever being part of a course
[13:42] Action: Hix sneakily dons headphones as the boss is working from home
[13:42] <ed__> or even a lab
[13:42] <adamgreig> even my "practical optimisation" is a lot of theory and no inclination of writing it
[13:42] <adamgreig> except the coursework requires writing it
[13:42] <adamgreig> that's the practical bit I guess
[13:42] <ed__> so what are you trying to optimsie?
[13:42] <adamgreig> and "good luck"
[13:43] <adamgreig> f(x)
[13:43] <adamgreig> for some x in some set. like R^N maybe
[13:43] <adamgreig> "practical" is a misnomer
[13:43] <ed__> who takes it?
[13:43] <adamgreig> right this instant f(x) = x^4 cos (1/x) + 2x^4
[13:43] <adamgreig> which is awful - infinitely many local minima between 0 and 1
[13:43] <adamgreig> and undefined at 0, which is the limit of the global minima
[13:44] <adamgreig> gabor csanyi
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[13:44] <adamgreig> I eventually find like 1E-80 as my minima and terminate
[13:44] <adamgreig> it's not very satisfying
[13:45] <fsphil> yay, http://www.bbc.co.uk/mediacentre/latestnews/2013/sky-at-night.html
[13:45] <ed__> oh yes
[13:45] <ed__> he's quite twitchy isn't he
[13:45] <adamgreig> uh huh
[13:45] <adamgreig> enjoys blackboards
[13:45] <adamgreig> doesn't enjoy lecture handouts
[13:45] <adamgreig> took 1A computing so everyone has a solid hatred of him
[13:45] <ed__> lol
[13:45] <adamgreig> (1A computing with a blackboard and nothing else)
[13:45] <ed__> that was after my time
[13:45] <ed__> was that the mars lander thing?
[13:45] <ed__> oh
[13:46] <ed__> well
[13:46] <adamgreig> nah
[13:46] <ed__> we had Andrew Gee
[13:46] <adamgreig> mars lander came a little later
[13:46] <ed__> who is nice enough
[13:46] <adamgreig> yea we had gee for mars lander bits I think
[13:46] <ed__> but properly institutionalised
[13:46] <adamgreig> haha oh, gee
[13:46] <adamgreig> isn't he
[13:46] <fsphil> blackboard is horrible. I hate watching someone writing on it
[13:46] <adamgreig> I spent my IIA computing project just arguing with him
[13:46] <adamgreig> literally
[13:46] <fsphil> the noise of it
[13:46] <ed__> didn't want us to attend the conference at MIT because we'd miss one of his computer labs
[13:46] <fsphil> urg
[13:46] <adamgreig> two hours a day, two days a week
[13:46] <ed__> literally threw up a bug fuss about it
[13:46] <adamgreig> my teammates just facepalmed
[13:46] <ed__> after college had sponsored us travel and everything
[13:46] <adamgreig> we both have strong and very different opinions about software, it turns out
[13:47] <adamgreig> and software development as a process
[13:47] <ed__> what is his view?
[13:47] <adamgreig> antiquated.
[13:47] <adamgreig> anyway it's definitely lunch time now, bbl
[13:50] <Hix> how's your SW project coming on ed__?
[13:50] <ed__> not touched it for a week
[13:50] <ed__> hoping to this weekend
[13:50] <Hix> k
[13:50] <ed__> or thursday eve
[13:51] <Laurenceb> ew
[13:51] <Laurenceb> now i have blisters on my hands
[13:51] <Laurenceb> "occupational hazards"
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[13:54] <Laurenceb> i see D-2 is trying to beat B-22
[13:55] <wd8mnv> it's got a shot if it can find a ground station to track it
[13:56] <ed__> adamgreig, i know the @pinboard guy
[13:56] <ed__> his blog is good
[13:56] <ed__> he has some good rants
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[14:21] <mfa298> ISS should be in range now
[14:23] <Hix> quick python q. "x[i] = 2.* math.pi * i/(num_points -1.)" why do i need the decimal after the values 2 and 1?
[14:24] <fsphil> ensure it's a floating point number?
[14:24] <fsphil> that's kinda ugly
[14:24] <fsphil> 2.0 -1.0 would be nicer
[14:25] <Hix> ahh because unless specified python treats numbers as absolutes?
[14:26] <Hix> agree it is ugly - and misleading he should have specced it as you did in the answer.
[14:27] <ibanezmatt13> query UpuWork
[14:27] <ibanezmatt13> oops
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[14:32] <adamgreig> ed__: yea I love his rants
[14:33] <adamgreig> ibanezmatt13: use datetime not date
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[14:33] <ibanezmatt13> huh?
[14:33] <adamgreig> Hix: yea it's just because 2. is floating and 2 is integer. in python3, / promotes to float when required so you wouldn't need it. using "2." is common shorthand
[14:33] <ibanezmatt13> I wasn't using date was I
[14:33] <adamgreig> sorry time
[14:33] <adamgreig> from datetime import datetime
[14:33] <adamgreig> not time
[14:33] <ibanezmatt13> ah
[14:33] <adamgreig> and try that
[14:33] <ibanezmatt13> ok
[14:33] <ibanezmatt13> thanks
[14:33] <adamgreig> think matplotlib only detects datetime objects not time objects
[14:33] <fsphil> how do you do an integer division in python3?
[14:34] <ed__> /
[14:34] Last message repeated 1 time(s).
[14:34] <ed__> fuck
[14:34] <ed__> //
[14:34] <ed__> 3 // 2
[14:34] <ibanezmatt13> adamgreig, so instead of parsedtime = time(int(timestr[0:2]), int(timestr[2:4]) it would be parsedtime = datetime(int(timestr[0:2]), int(timestr[2:4]) yes?
[14:35] <adamgreig> yes
[14:35] <ibanezmatt13> got it, thanks
[14:36] <ibanezmatt13> I'm pretty confident I'm gonna walk the Core 1 exam by the way. I've been doing paper after paper and I'm getting quite fast at doing the Q's. Same with D1
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[14:37] <ibanezmatt13> the only thing I've not quite grasped is working out the area under curves when they dip below the x axis. I always get the wrong answer :P
[14:37] <ibanezmatt13> above the x axis, all seems fine
[14:38] <adamgreig> heh
[14:38] <adamgreig> oh huh
[14:38] <ibanezmatt13> :)
[14:38] <adamgreig> uhm, you need the absolute area or what?
[14:38] <adamgreig> typically that is just "integrate" (i.e., integrate gives you the area under a curve)
[14:38] <adamgreig> but that's negative when underneath
[14:38] <adamgreig> which is normal and proper
[14:39] <adamgreig> but maybe you want to be integrating the absolute value, idk
[14:39] <adamgreig> still, a good sign
[14:39] <adamgreig> keep it up
[14:39] <adamgreig> when's your C1 exam? jan?
[14:39] <ibanezmatt13> nah, june
[14:39] <adamgreig> wow, plenty of time
[14:39] <adamgreig> doing any in jan?
[14:39] <ibanezmatt13> no, apparently they scrapped jan exams for some reason
[14:39] <ibanezmatt13> = good thing
[14:42] <ibanezmatt13> adamgreig: page 3 http://filestore.aqa.org.uk/subjects/AQA-MPC1-W-QP-JAN09.PDF
[14:42] <ibanezmatt13> integrating between 0 and 2 would give the area "under" or "over"?
[14:42] <ibanezmatt13> I thought always under, but I don't know much about it
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[14:43] <adamgreig> jan exams were great
[14:43] <adamgreig> could resit in june
[14:43] <ibanezmatt13> true
[14:43] <Steve_G0TDJ> ibanezmatt13: Posted :-)
[14:43] <ibanezmatt13> thank you very much Steve_G0TDJ
[14:44] <Steve_G0TDJ> My leasure. There's a couple of extra parts to get the board started
[14:44] <Steve_G0TDJ> pleasure...
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[14:44] <ibanezmatt13> awesome, thanks :)
[14:44] <adamgreig> ibanezmatt13: the area between the line and y=0
[14:44] <adamgreig> always
[14:44] <ibanezmatt13> aaah
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[14:44] <adamgreig> which is sometimes "over" and sometimes "under"
[14:44] <adamgreig> in any event though
[14:45] <adamgreig> you are just doing "integrate between x=0 and x=2 the equation x^3 + x - 10, dx"
[14:45] <ibanezmatt13> aaah, I get it now
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[14:45] <ibanezmatt13> "always between curve and y=0" makes much more sense now
[14:45] <adamgreig> http://www.wolframalpha.com/input/?i=integrate+x%5E3%2Bx-10+dx+from+x%3D0+to+x%3D2
[14:46] <ibanezmatt13> ah but wait, what if there was an equal area above and below if you were told to work out the area?
[14:46] <ibanezmatt13> wouldn't you get 0
[14:46] <ed__> you'll just get a negative number
[14:46] <ve6ts> microsat-1 launched on the weekend: http://arawr.ca/?page=piccw5 this was a field-hell transmitter with no GPS test
[14:46] <ed__> @ the first q
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[14:47] <ve6ts> my next flight will be a float flight
[14:47] <ed__> if the area is the same above and below then yes zero
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[14:47] <ibanezmatt13> right ed__, I was thinking I'd have to add them together
[14:48] <ibanezmatt13> ie, the two areas
[14:48] <ed__> sure, so you could find the zero crossings and integrate individually and add the absolute values
[14:48] <ibanezmatt13> right, I think I understand that now, thanks
[14:48] <adamgreig> ibanezmatt13: so it depends on the question exactly
[14:49] <adamgreig> but yes, you would get 0 and that's ok
[14:49] <adamgreig> e.g. integrate sin(x) for x=0 to 2pi
[14:49] <adamgreig> (or 0 to 360 degrees)
[14:49] <ibanezmatt13> yup, think I got it now
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[14:57] <ed__> oh cool
[14:57] <ed__> rocket industry gossip has just arrived
[14:58] <ed__> that's the next couple of hours of work gone
[14:58] <ed__> bbl
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[14:59] <Babs> On the retro front, check out what I found being hawked in a shop the other day http://imgur.com/hef7ial
[14:59] <Babs> Farnell clearly quite a different proposition back then
[15:03] <fsphil> I bet it still works
[15:04] <adamgreig> cusf lab has a few bits that look like that
[15:04] <adamgreig> huge box but 1A tops is a bit pants
[15:05] <adamgreig> think I replaced it with a tenma thing recently
[15:06] <fsphil> isn't that the farnell own brand?
[15:06] <adamgreig> yes :P
[15:06] <KT5TK> B-2 is coming down in inhabited area. Anyone ready to recover it?
[15:07] <Laurenceb> be interesting to see why it came down
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[15:07] <Babs> i was quite tempted to buy it, but then I thought of this http://www.youtube.com/watch?v=uVvcD4Czx4Y and thought that I was about t get ripped off
[15:09] <x-f> ooh, D-2 is updating
[15:10] <DL7AD> bounced back into the air
[15:10] <DL1SGP> it clearly slowed down looking at the sprint it did before :)
[15:10] <DL1SGP> Well, it deserved some rest :D
[15:11] <KT5TK> We've seen this ground effect before when the balloon is still inflated
[15:11] <x-f> it was kicked out of the storm
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[15:13] <Laurenceb> haha wut
[15:14] <x-f> would be nice if pico payloads had more frequent updates if altitude <2000 m and speed >5 km/h
[15:14] <Hix> Babs you're wedding pic you posted, you ain't got nothing on these originals :) http://imgur.com/gallery/J07EZ
[15:14] <Hix> damn. I cannot forgive myself for that you're
[15:14] <acidtech> how much weight can lift a 36" helium baloon?
[15:15] <mfa298> acidtech: up to around 50g I think
[15:15] Action: Hix has commited the crime he hateth the most
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[15:15] <mfa298> might be a bit more, although it depends on how high you want it to get
[15:16] <Babs> in public too
[15:16] <Babs> *shakes head*
[15:16] <acidtech> 5km for example
[15:17] <mfa298> for 5km you probably want well under 50g
[15:17] <fsphil> well forgive you Hix
[15:17] <Hix> Babs forget my errors and check out the link. I've just found out about the M25 and how long getting home is going to be so concentration has taken a massive hit
[15:17] <KT5TK> acidtech: http://ukhas.org.uk/projects:microballoons:data
[15:18] <Hix> your very kind fsphil i regret what i did back their
[15:19] <mfa298> acidtech: I found one example of a 50g payload on a 36" balloon which burst at 3km
[15:19] <mfa298> Leo's payloads which managed 10km were around 14g
[15:19] <acidtech> I don`t understand sizes - 1x92 is one 92" baloon?
[15:20] <Hix> the importance of spelling http://imgur.com/gallery/J07EZ
[15:20] <craag> acidtech: 92cm
[15:20] <acidtech> ok )
[15:20] <x-f> = 36"
[15:20] <acidtech> that`s better
[15:20] <mfa298> at a guess 92 is 92cm - so ~36"
[15:20] <Hix> oh, it really is all going wrong
[15:20] <ed__> there are some great old farnell PSUs
[15:20] <Hix> http://t.co/xrz4H0oeOt
[15:20] <x-f> there are graphs below the table on that page
[15:20] <ed__> i'd get them every single time over modern <£100 chinese PSUs
[15:20] <ed__> way better for the money
[15:23] <acidtech> what kind of psu?
[15:26] <acidtech> i just checked weight of single lithium battery, and it is 45g :(
[15:27] <mfa298> acidtech: most people use energizer lithium ultimate which are much lighter
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[15:32] <ed__> acidtech, lab psu
[15:33] <ed__> 0-20v, 1A or whatever
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[15:38] <acidtech> I use EP-603 psu
[15:38] <Hix> 45g fro an AA? wtf
[15:38] <acidtech> no, it is not AA
[15:39] <x-f> LiPo?
[15:39] <acidtech> 18650
[15:39] <ed__> ibanezmatt13, ping
[15:39] <ibanezmatt13> afternoon
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[15:40] <Hix> ahhh
[15:41] <Hix> wouldn't 18650s drop dramatically at -40°C
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[15:47] <mfa298> acidtech: look for these - http://www.energizer.com/batteries/performance-lithium/ultimate-lithium/Pages/aaa.aspx
[15:47] <mfa298> much lighter, more power, and work in colder temperatures
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[15:50] <craag> Note: The Ultimate Lithiums aren't rechargeable.
[15:51] <craag> But are otherwise quite perfect.
[15:51] <Hix> but then again a dead payload is unrecoverable
[15:51] <Hix> save £5 to possible lose >£50
[15:52] <craag> If you want to do a float payload, solar power is probably the way to go. The way I see it there isn't much need for a battery on Leo's flights, just a cap for APRS bursts maybe.
[15:53] <fsphil> cap will smooth the input as it spins
[15:53] <craag> yep that as well.
[15:53] <fsphil> the cords and balloons may cast a shadow
[15:53] <fsphil> not so much the balloons maybe
[15:53] <adamgreig> overnight
[15:54] <craag> adamgreig: We don't get much out of Leo's overnight anyway.
[15:54] <mfa298> I think on leo's payloads solar on it's own isn't enough to power gps/radio but with something to store a bit of charge (cap) it should be good
[15:54] <adamgreig> indeed
[15:54] <adamgreig> no reason not tho
[15:54] <craag> And the LiPo knackers quite quick, after which most of it is dead weight?
[15:55] <mfa298> if you're going for the artic challenge you might need to rely on batteries more (or wait until summer)
[15:56] <nats`> problem with cap will be the working voltage
[15:56] <nats`> you'll need a good boost
[15:56] <nats`> something like 100mV startup
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[16:14] <Reb-SM3ULC> Impressive precision landing by D-2 just next to trackingstation! ;)
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[16:21] <ibanezmatt13> I can't tell if I'm going insane or not. Page 5 http://filestore.aqa.org.uk/subjects/AQA-MD01-W-QP-JUN06.PDF
[16:22] <ibanezmatt13> "Where no time is available there is no direct flight available"
[16:22] <ibanezmatt13> I can't see how I can complete the figure, it looks already completed :/
[16:23] <ibanezmatt13> ooh
[16:23] <ibanezmatt13> there's an insert :P
[16:23] <ibanezmatt13> lol
[16:23] <Hix> rtfm ;p
[16:23] <Hix> not quite what my teachers said but the same sentiment :D
[16:24] <ibanezmatt13> haha, yep true
[16:24] <mfa298> further proving one of the points in JGC's talk at the conference.
[16:25] <mfa298> start talking about a problem your having and you might realise the trivial solution
[16:25] <ed__> or a football
[16:25] <ed__> disturbing other people is annoying
[16:26] <ed__> http://imgur.com/xvNRKIT
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[16:42] <adamgreig> Hix: my teachers said RTFQ :P
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[17:00] <mfa298> looks like the airborne litmus test forum has been unlocked so comments can be made
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[17:18] <Lunar_Lander> hello
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[17:28] <Willdude123> I want to do a B-30 HAB just to mess up LeoBodnar's numbering system
[17:30] <Lunar_Lander> XD
[17:30] <Lunar_Lander> music https://www.youtube.com/watch?v=3wc4xxwnfWM
[17:34] <mfa298> you'll have to be quick if you want to launch a B-30 before Leo
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[17:55] <DL7AD> okay.... planning D-3 on 30th, D-4 on 31st, D-5 on 1st, D-6 on 2nd, D-7 on 3rd *rofl*
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[17:58] <osa> sorry for my Lang. We plan to look for in the morning Transmitter "D2". Russia Kirov.
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[18:07] Nick change: danielsaul -> danielsaul_alt
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[18:14] Nick change: danielsaul_alt -> danielsaul
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[18:32] <DL7AD> http://www.r4n.su/forum/viewtopic.php?p=2268#p2268
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[18:34] Nick change: Gadget-Mac_ -> Gadget-Mac
[18:36] Nick change: danielsaul -> danielsaul_alt
[18:36] <tweetBot> @AMSAT_UK: Introduction to High Altitude Ballooning http://t.co/w0kmTT0ZGT #amsat #hamr #amateurradio #hab #ukhas
[18:37] Action: craag runs and hides
[18:38] <DL1SGP> Hide&Seek *yay*
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[18:39] <craag> DL1SGP: It's me in the tweeted video ^^
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[18:43] <fsphil> is the video choppy or is my laptop being weird craag?
[18:43] <fsphil> ah, it was your mic
[18:43] <craag> Yeah, mic battery was dead at the start.
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[18:45] <DL1SGP1> I will watch that in a bit
[18:46] <craag> It's all very basic really.
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[18:48] <Lunar_Lander> craag, COOL
[18:48] <Lunar_Lander> :)
[18:48] <Lunar_Lander> I got a cool video for you too if you like?
[18:49] <Lunar_Lander> https://www.youtube.com/watch?v=EKWGGDXe5MA
[18:49] <Lunar_Lander> feynman!
[18:50] <craag> Thanks Lunar_Lander
[18:50] <craag> He does love his hand-actions!
[18:50] <Lunar_Lander> you're welcome :)?
[18:50] <Lunar_Lander> :) yea
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[18:50] <Lunar_Lander> (without question mark xD)
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[18:55] <ibanezmatt13> Evening
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[18:59] Nick change: danielsaul_alt -> danielsaul
[19:00] <SpeedEvil> http://store.elsevier.com/coArticle.jsp?pageid=17600012 - one dollar ebook sale.
[19:00] <SpeedEvil> Some look relevant and interesting to HA
[19:03] <Steve_G0TDJ> Good Evening Guys
[19:03] <ibanezmatt13> Evening
[19:03] <SpeedEvil> hey
[19:03] <Laurenceb> http://www.youtube.com/watch?v=QxpHJipB67g&list=PLGjbAdaOBLBlWEtcNb8QzBKk7lQc_JWGF
[19:04] <Steve_G0TDJ> Just been preparing to put VAYU_NTX on my blog. http://projecthab.co.uk/vayu_ntx-v1-03-hab-tracker-pcb/
[19:04] <Steve_G0TDJ> Haven't got time tonight but I'll probably get it done tomorrow.
[19:05] <ibanezmatt13> good stuff
[19:05] <SpeedEvil> hah
[19:05] <Steve_G0TDJ> Jumping sausages
[19:08] <Steve_G0TDJ> Matthew, how you getting on with your plots?
[19:08] <ibanezmatt13> not so bad, I got it plotting time after a while
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[19:08] <Steve_G0TDJ> Good oh
[19:08] <ibanezmatt13> Just binding it together into one file that does multiple graphs
[19:09] <DL1SGP1> craag: nice video, they should get better mics though :)
[19:09] <Steve_G0TDJ> I was going to ask you Matt, what is the humidity measured in?
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[19:10] <craag> DL1SGP1: They're the Amateur *Television* Club, they don't do audio :P
[19:10] <DL1SGP1> hehe
[19:10] Nick change: danielsaul -> danielsaul_alt
[19:11] Nick change: danielsaul_alt -> danielsaul
[19:11] <craag> Yes the audio recording is shocking, I've tried to volunteer to do it but yet to get a chance.
[19:11] <mfa298> and as radio amateurs they should be using the minimum bandwidth necessary so the audio should be limited to 3khz ;)
[19:11] <craag> haha mfa298
[19:11] <DL1SGP1> well not hard to understand you so that is still OK
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[19:12] <DL1SGP1> b-23 on map
[19:12] <malgar> I have a problem with dl-fldigi.. suddently it doesn't start anymore
[19:12] <Steve_G0TDJ> DL1SGP1: I just pmed Leo to see if he's launching tonight :-)
[19:13] <DL1SGP1> haha Steve
[19:13] <Steve_G0TDJ> I know, he doesn't usually test, it's just appear-launch-go very far
[19:14] <DL1SGP1> He might have a hidden test bunker :)
[19:14] <mfa298> malgar: was that on fedora using my rpm ?
[19:16] <Steve_G0TDJ> I like the prediction, coming this way. Sadly, I've got to go out soon....
[19:16] <malgar> mfa298: yes
[19:16] <malgar> oh! it still works as root
[19:16] <mfa298> hmmm, it should be ok as a normal user
[19:16] <DL1SGP1> Steve maybe you can take a netbook/notebook and vnc into things :)
[19:16] <mfa298> unless there's some issue with permissions for something like an audio device
[19:17] <Steve_G0TDJ> I would love to Felix but I haven't got an easily portable 70cms Rx
[19:17] <Steve_G0TDJ> Oh I see, VNC back to base
[19:17] <DL1SGP1> yes :)
[19:17] <mfa298> assuming you're normally using the icon for it you might get some useful degug info if you run it in a console as dl-fldigi --hab
[19:17] <Steve_G0TDJ> I don't believe where I'm going has an Internet connections.
[19:17] <Steve_G0TDJ> I will find out for future though
[19:18] <malgar> mfa298: Caught signal 11
[19:18] <malgar> Aborting dl-fldigi due to a fatal error.
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[19:29] <Herman-PB0AHX> GE all
[19:29] <Steve_G0TDJ> GE OM :-)
[19:31] <Herman-PB0AHX> hi steve
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[19:32] <Herman-PB0AHX> going B23 flying today ???
[19:33] <Steve_G0TDJ> We don't know yet Herman
[19:33] <PB0NER> oh that is what I was going to ask :)
[19:33] <ve6ts> what does B23 have for power source, i see it is at 1.56 volts?
[19:33] <x-f> http://isleoflying.com/ - heh :)
[19:34] <ve6ts> is that a single AA or AAA battery?
[19:36] <Herman-PB0AHX> to late martijn
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[19:47] <Steve_G0TDJ> B-32 is decidely up
[19:47] <DL1SGP1> agreed Steve_G0TDJ
[19:47] <Steve_G0TDJ> Anyone got a freq.?
[19:47] <ibanezmatt13_> B-32 aready! :p
[19:47] <Boggle_mint> Up, but very weak :(
[19:47] <Steve_G0TDJ> LOL Sorry... 23
[19:47] <Boggle_mint> Usual frequency
[19:47] <Steve_G0TDJ> 434.5
[19:48] <Boggle_mint> yup
[19:48] <Steve_G0TDJ> Cool. Gotta go aout the room but I'll leave the radio on. be back in a tick
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[19:53] <DL1SGP1> if B-23 stays on that predicted path it won't get anywhere close for tracking for me :)
[19:54] <Upu> 434.LEO ?
[19:54] <Lunar_Lander> hey anthony
[19:55] <Upu> Hi Kevin
[19:55] LeoBodnar (5c19240e@gateway/web/freenode/ip.92.25.36.14) joined #highaltitude.
[19:56] <DL1SGP1> Hi Upu, Hi Lunar_Lander
[19:56] <DL7AD__> good evening
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[19:57] Nick change: DL7AD__ -> DL7AD
[19:57] <Lunar_Lander> hello :)
[19:57] Nick change: DL1SGP1 -> DL1SGP
[19:57] <DL1SGP> Nabend Sven
[19:58] <LeoBodnar> evening!
[19:58] <DL1SGP> cheerio mr LeoBodnar any new experimental gimmicks on board?
[19:58] <LeoBodnar> It's purely an APRS experiment, nothing much new
[19:59] <LeoBodnar> Very low signal on UHF as well
[19:59] <DL1SGP> okie
[19:59] <DL1SGP> in that case :D "have a safe float B-23"
[19:59] <LeoBodnar> lol
[20:00] <LeoBodnar> ta
[20:00] <G8KNN> LeoBodnar, how much power on UHF?
[20:00] <LeoBodnar> Not sure :D
[20:00] <Steve_G0TDJ> Can't find it here LeoBodnar
[20:00] <G8KNN> I guess at 100uW :-)
[20:01] <LeoBodnar> I have used one of the old PCBs and it might have had LPF for 2m
[20:01] <G8KNN> I think you might be right!
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[20:04] <LeoBodnar> I am surprised you are picking it up
[20:04] <Steve_G0TDJ> I wish I was, I have to go in a minute!
[20:04] <G8KNN> I am too. It is very weak.
[20:05] <G8KNN> Is APRS callsign M0XER-2?
[20:06] G0CXW (51b2ed8f@gateway/web/freenode/ip.81.178.237.143) joined #highaltitude.
[20:07] <LeoBodnar> yeah
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[20:07] <Steve_G0TDJ> Not APRSing over the UK though....
[20:07] Nick change: danielsaul -> danielsaul_alt
[20:08] <G8KNN> Ah, OK. Will watch out for its first airborne transmission :-)
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[20:08] <Lunar_Lander> hello LeoBodnar DL7AD
[20:08] <Lunar_Lander> PICO balloon champions of the world
[20:08] <Lunar_Lander> XD
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[20:10] Nick change: BrainDamage1 -> BrainDamage
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[20:13] <G0CXW> Thought I would be hearing something by now, am I missing something ?
[20:13] <Steve_G0TDJ> Same here G0CXW
[20:14] <Steve_G0TDJ> G8KNN: Is B-23 bang on Freq?
[20:14] on1kdc (510bc739@gateway/web/freenode/ip.81.11.199.57) joined #highaltitude.
[20:14] <G8KNN> Yes, 434.500, my cursor centre at 1.4kHz
[20:15] <Steve_G0TDJ> Oh well, gotta go guys, Catch you later! Good luck LeoBodnar :D
[20:15] <mfa298> ho hum, the airborne litmus test (http://rsgbdata.net/litmus/viewtopic.php?f=22&t=36) has the but will you please think of the repeaters comment.
[20:15] Nick change: Steve_G0TDJ -> Steve_G0TDJ_AFK
[20:15] <G8KNN> G0CXW, the tx power is way down on usual, so its a bit of a challenge to receive
[20:15] <AndChat|453921> eroomde you mentioned a reflow controller earlier. Got a link?
[20:16] <LeoBodnar> cherrs Steve_G0TDJ_AFK
[20:16] <AndChat|453921> I'm supposed to be hix wtf
[20:17] <G0CXW> G8KNN thanks thats good to know, thought I might have a problem
[20:17] G4AIU-Eugene (56a11f08@gateway/web/freenode/ip.86.161.31.8) joined #highaltitude.
[20:18] <AndChat|453921> Me yet
[20:18] <AndChat|453921> Nope
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[20:19] <AndChat|453921> Shit app
[20:19] <Upu> mfa298 I like the first poster getting told on that forum link
[20:20] <AndChat|453921> .
[20:21] <mfa298> If I can come up with a decent post I'm going to post something suggesting that it's an area of real radio innovation and experimentation.
[20:21] <ibanezmatt13_> Upu: where do you shove the .lbr file containing logos and pictures if you wanna put it on a board?
[20:22] <Upu> eagle/libaries ?
[20:22] <mfa298> and suggest the things we've talked about where extra power/bandwidith is of interest (ATV/HF)
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[20:22] <ibanezmatt13_> ah ok, just wondered if they went in with the components
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[20:26] Nick change: danielsaul_alt -> danielsaul
[20:27] <DutchMillbt> Hi All what's the dail frequency for B23?
[20:28] <G8KNN> DutchMillbt, 434.500
[20:28] <DutchMillbt> oke thankz
[20:28] <G8KNN> The tx power is very low though
[20:29] <iain_G4SGX> No trace here yet. Is the TX pwr low because its going through a 2M LPF for the APRS?
[20:29] <G8KNN> I guess so
[20:30] <LeoBodnar> yes iain_G4SGX
[20:30] <DutchMillbt> but regular 3 sec blips and DominoEX 16?
[20:30] <G8KNN> DutchMillbt, yes
[20:31] <DutchMillbt> oke G8KNN thank you..
[20:31] <iain_G4SGX> Aha cool tnx.
[20:35] Wouter-[pa3weg] (~wouter@53569EA8.cm-6-7c.dynamic.ziggo.nl) joined #highaltitude.
[20:35] <ibanezmatt13_> Upu: you got a link for those foam balls that you put the Pavas in?
[20:35] <Upu> www.ebay.co.uk
[20:35] <ibanezmatt13_> :p
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[20:38] Nick change: mssssm_ -> mssssm
[20:39] <ibanezmatt13_> wow, £6 for a polystyrene ball with 20cm diameter!
[20:40] <ibanezmatt13_> that's totally ridiculous
[20:41] <Upu> speak to Dave
[20:41] <Upu> see if he can give you a link
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[20:41] <ibanezmatt13_> ok, will do
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[20:43] <ibanezmatt13_> is a ball the best shape for a payload to minimise spinning?
[20:44] <ibanezmatt13_> thinking about it, there's less surface area for the wind to push it round, but not sure
[20:45] <Herman-PB0AHX> why does 1 station writing b23 and not more stations ??
[20:45] Action: bertrik powers up the revspace tracker
[20:46] <Upu> Herman-PB0AHX weak signal
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[21:00] <PE0SAT> Herman-PB0AHX: What freq is B23 using?
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[21:03] <DL1SGP> Jan: 434.500 MHz en APRS op 144.800 MHz if 2 deg east and not above NL :)
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[21:04] <Herman-PB0AHX> pe0sat hoi jan that is 343.500
[21:04] <Herman-PB0AHX> he is in fldigi
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[21:05] <fsphil> 434, not 343
[21:05] <DL1SGP> :)
[21:05] <Herman-PB0AHX> oeps yes 434.500
[21:06] <PE0SAT> Herman-PB0AHX: Hi Herman, and the mode?
[21:07] <Herman-PB0AHX> domx16
[21:07] <Herman-PB0AHX> but not yet hearing any til now
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[21:07] <Willdude123> Upu: You know that socks proxy thing? I'm trying to do it but chrome is saying no data received
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[21:09] <PE0SAT> Herman-PB0AHX: Never heard or domx16 before so no idea what I am looking for
[21:09] <DL1SGP> PE0SAT: Domino EX16 , supported by Fldigi and especially dl-fldigi
[21:09] <DL1SGP> let me get you a link
[21:09] <Herman-PB0AHX> blieb blieb blieb blieb hihihihihi
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[21:10] <PE0SAT> DL1SGP: If have dl-fldigi running but don't now how I can recognise Domino EX16
[21:10] <LeoBodnar> PE0SAT: you can click T/R in dl-fldigi just make sure you have mode set to DominoeEX 16
[21:11] <PE0SAT> LeoBodnar: Thx thats a nice one ;-)
[21:12] <DL1SGP> http://ukhas.org.uk/guides:tracking_guide#dl-fldigi
[21:12] <DL1SGP> ah ok, thanks for filling in Leo :D
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[21:16] <DutchMillbt> Bonsoir F5APQ quelle est la fréquence de B23 avec vous
[21:17] <PE0SAT> I see 4 lines in the dl-fldigi where should I tune?
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[21:18] <DL1SGP> Bonsoir DutchMillbt je ne pense pas que F5AQP fais partie du conversation. En tout cas la frequence sera pres du 434.500 MHz
[21:19] <G8APZ> I make it 434.5016 - just getting FL digi set up for next telem
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[21:19] <LeoBodnar> Red lines are actual RX band and yellow ones are for setting the red ones
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[21:20] <LeoBodnar> http://www.g4sgx.org/images/screen.jpg
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[21:21] <DutchMillbt> Yes thankz DL1SGP
[21:22] <DL1SGP> Graag gedaan DutchMillbt
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[21:27] <bertrik> not seeing anything of B-23 here yet at revspace, the hague, netherlands
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[21:30] <G8APZ> lost sigs... only on a scratch antenna here but I would expect to hear more!!
[21:30] <LeoBodnar> It's very very weak bertrik
[21:30] <G8APZ> Brentwood to Kent not far
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[21:31] <fsphil> problems with the payload?
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[21:32] <G8APZ> I heard it when it passed by but not exactly endstop!!
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[21:33] <LeoBodnar> fsphil: I think I have used 2m LPF board inadvertently
[21:33] <ve6ts> if i understand it right, domino mode using only a single tone (on/off)?
[21:33] <Upu> soon see when the APRS kicks in
[21:33] <Upu> ve6ts 18 tones
[21:34] <malgar> LeoBodnar: do you think that B-23 could reach alps?
[21:34] <ve6ts> oh the primer i'm reading must be wrong then
[21:34] <Upu> http://www.qsl.net/zl1bpu/MFSK/Technical.htm
[21:34] <ve6ts> thanks Upu
[21:34] <LeoBodnar> Kicks in and shuts down again :D
[21:34] <LeoBodnar> France
[21:36] <DL1SGP> lol
[21:37] <DL1SGP> it'll come back over south-Germany :)
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[21:37] <db_g6gzh> 1htop
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[21:40] <Reb-SM3ULC> B23 prediction?
[21:42] <DL7AD> Reb-SM3ULC: i will run one for you
[21:42] <Reb-SM3ULC> DL7AD: Vielen dank!
[21:43] <Lunar_Lander> hi Reb-SM3ULC
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[21:44] <ibanezmatt13> eroomde: ping
[21:44] <LeoBodnar> http://ready.arl.noaa.gov/hypubout/175798_trj001.gif
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[21:48] <DL7AD> http://ready.arl.noaa.gov/hypub/arlTraj.swf?client=gme-noaa&channel=OAR.ARL.HQ.HYSPLIT&dir=/hypubout/HYSPLITtraj_176471&data=/hysplit_metadata&ext=html
[21:50] <malgar> Upu: ping
[21:50] <Upu> hello
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[21:51] <malgar> I see that the GPS breakout board draind 65 mA, but I see that maximum output for arduino is 40mA
[21:51] <malgar> drains
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[21:51] <Upu> Yep
[21:51] <Lunar_Lander> yeah, you need an extra circuit
[21:51] <malgar> ok :)
[21:51] <Upu> however if you have the 5V board with level converters you can just connect it to the 5V line
[21:51] <Upu> as it has an on board regulator
[21:51] <Upu> and tbh
[21:52] <Upu> the MAX7 ones are no where near 65mA
[21:52] <malgar> yes I have it.. or well.. is on the way
[21:52] <Upu> which GPS board do you have and which Arduino ?
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[21:52] <malgar> Arduino / 5V Compatible uBLOX MAX-7 Breakout With Sarantel Antenna
[21:52] <malgar> arduino UNO rev. 3
[21:53] Nick change: BrainDamage1 -> BrainDamage
[21:53] <malgar> BrainDamage: ping
[21:53] <Upu> ok just wire the 5V line to the 5V on the board
[21:54] <Upu> the regulator on board will do the rest
[21:54] Nick change: heathkid|2 -> heathkid
[21:54] <malgar> perfect
[21:54] <chrisg7ogx> nothing seen of B23 on the SE coast
[21:54] <Upu> nah I can't hear it
[21:54] <malgar> and what about ntxb? do I need an extra circuit?
[21:54] <malgar> ntx2b
[21:54] <Upu> follow the circuit on the UKHAS Wiki for the NTX2
[21:54] <Upu> its only 3 resistors
[21:55] <malgar> ok
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[21:57] <chrisg7ogx> can G8KNN-1,or F5APQ confirm 434.500 please?
[21:59] <acidtech> mode?
[21:59] <DL1SGP> chrisg7ogx: the balloon might be weaker in ERP on 70cm due to the potential presence of a 2m LPF
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[22:00] <chrisg7ogx> OK tks in that case I may stand a better chance once it is south of Eastbourne
[22:02] <G8KNN> chrisg7ogx, 434.500 dial, cursor centre at 1.6kHz
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[22:02] <G8APZ> G7OGX Chris, when it passed by here it was on 434.5016 about half an hour ago
[22:02] <mfa298> acidtech: if you're asking about B-23 then its probably DominoEX16 every few minutes with short dit's in between at 3s intervals
[22:03] <chrisg7ogx> Ok tks G8knn and G8apz
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[22:03] <acidtech> thanks, mfa298
[22:03] <G8APZ> it's moving fast over Channel!!
[22:03] <LeoBodnar> 82mph
[22:03] <G8APZ> LoS Eastbourne
[22:05] <G8APZ> Leo - I hope to put a better antenna out next time... I didn't have my 70cm beam on the 60ft mast!!
[22:05] <G8APZ> so had to use a 2m dipole stuck out of the window
[22:06] <mfa298> nothing wrong with a 2m dipole stuck out a window, that's how I've tracked a number of habs
[22:06] <LeoBodnar> :D I'd rather put proper components on the PCB next time. It's less hassle.
[22:06] <Geoff-G8DHE> Huh might have guessed B-23 passing overhead I'll get the Rx on!
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[22:08] <DL1SGP> well LeoBodnar let's say some HAM that recently got awfully wet rushed you to launch so that is why :)
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[22:09] <LeoBodnar> haha
[22:11] <malgar> It would be useful a page on ukhas wiki about receiving antennas. Days ago someone of you suggested me some models but I forgot them :P
[22:11] <PB0NER> I guess I'm supposed to listen to beeps every 10 seconds -> DOMINO
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[22:12] <PB0NER> and so on
[22:13] <chrisg7ogx> LeoBodnar do you announce your launches? If yes where please?
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[22:13] <Geoff-G8DHE> Oh thats not very strong ? Anything changed LeoBodnar ?
[22:13] <DL1SGP> Martijn, beebs should be every 3 seconds, and then after a while telemetry
[22:13] <mfa298> chrisg7ogx: I think he announces on spacenear.us by having a balloon appear!
[22:13] <DL1SGP> @everyone, there is a 2m LPF attenuating the 70cm sig
[22:13] <Geoff-G8DHE> Oh no !
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[22:14] <acidtech> i hear some beeps on 434.5 in fm mode
[22:14] <PB0NER> ok DL1SGP that is what I expected
[22:14] <mfa298> acidtech: you'll need the radio in usb mode
[22:14] <chrisg7ogx> LOL guessed so!
[22:14] <DL1SGP> acidtech: can you switch to USB?
[22:14] <PB0NER> 2m LPF?
[22:14] <LeoBodnar> chrisg7ogx: I need to get better in that respect. But most of the time I decide to launch within an hour or two
[22:14] <acidtech> no, it is cheap handheld radio
[22:14] <DL1SGP> ja Martijn
[22:14] <PB0NER> does not compute
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[22:15] <mfa298> acidtech: chances on fm all you're likely to hear is a bit of quietening during a transmission
[22:15] <LeoBodnar> APRS updated http://aprs.fi/#!mt=roadmap&z=9&call=a%2FM0XER-2&timerange=345600&tail=345600
[22:15] <chrisg7ogx> I'm very happy you have given us all so much fun and interest -= forgiven!
[22:16] <PB0NER> DL1SGP: I do not get the meaning of LPF
[22:16] <chrisg7ogx> mfa298 that's exactly what I am getting with vy occasional beeps
[22:16] <DL1SGP> Low Pass Filter
[22:16] <mfa298> acidtech: depending on your location you might hear some of the aprs - but you'll need something suitable to decode it so you know if it's coming from Leo's balloon
[22:16] <acidtech> can anyone record few seconds of signal?
[22:16] <PB0NER> so there is a wron component in the TX of b23?
[22:16] <PB0NER> +g
[22:17] <DL1SGP> it is one of the older boards. and for the APRS it would work :)
[22:19] <LeoBodnar> I have a half-dozen of older boards (pre-solar power) I want to get rid of and some are populated with components I don't remember the purpose of anymore. This must be one I have made specifically for 2m APRS playing around.
[22:20] <DL1SGP> heh LeoBodnarsending junk to the sky :)
[22:21] <LeoBodnar> It's biodegradeable. Just give it some time.
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[22:21] <chrisg7ogx> http://aprs.fi/#!addr=%20M0XER-2
[22:21] <DL1SGP> indeed lol :)
[22:22] <DL1SGP> so how precise is your 2d collision detection with french landmass? :P
[22:22] <chrisg7ogx> we are all biodegradeable ish
[22:23] <LeoBodnar> Few miles DL1SGP. I did not want to follow the coastline to high degree of accuracy.
[22:23] <DL1SGP> yeah that would be a bunch of data :)
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[22:24] <DL1SGP> welkom terug Wouter
[22:24] <Herman-PB0AHX> what is the exact frequentie of b23 ??
[22:24] <Wouter-[pa3weg]> ;) PC died on me :(
[22:24] <Wouter-[pa3weg]> wrong operating system...
[22:25] <DL1SGP> Herman-PB0AHX: (11:02:25 PM) G8APZ: G7OGX Chris, when it passed by here it was on 434.5016 about half an hour ago
[22:25] <DL1SGP> hehe, at operating systems do not die :)
[22:28] <Wouter-[pa3weg]> just happen to be on windoze, as Skype group video calls are not supported by the linux variant
[22:28] <DL1SGP> ah yes
[22:29] <LazyLeopard> Hmmm... The RSGB "Litmus Test" on airborne use seems to have been opened for comments...
[22:29] <Wouter-[pa3weg]> is B23 TXing domino as well as APRS, or is it one of them at a time?
[22:30] <mfa298> LazyLeopard: and already has one "but won't you think of the repeaters" person
[22:30] <DL1SGP> both, but APRS is only more the less transmitted in airspaces where the airborne operation of APRS equipment is permitted
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[22:31] <LeoBodnar> The idea was to do both at the same time but there were some changes made after that...
[22:31] <Wouter-[pa3weg]> so I do not have to keep on listening for the domino signal as soon as APRS turns on
[22:32] <LazyLeopard> Yeah... :/
[22:32] <LeoBodnar> I don't know Wouter-[pa3weg] , it might be a bug
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[22:32] <LeoBodnar> If you can hear beeps when APRS is on it would be good to know
[22:34] <LazyLeopard> ...though I notice G3WKL has knocked that to the boundary.
[22:36] <mfa298> yep
[22:37] <mfa298> I've started drafting a more sensible reply about why it's a good thing.
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[22:55] <DL7AD> good night
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[23:11] <Laurenceb__> why 1.5v battery on B-23?
[23:14] <DL1SGP> Laurenceb__: as far as I heard it is a pre-solar power board, maybe the difference in battery setup relates to that
[23:15] <Laurenceb__> oh
[23:15] <DL1SGP> (11:19:35 PM) LeoBodnar: I have a half-dozen of older boards (pre-solar power) I want to get rid of and some are populated with components I don't remember the purpose of anymore. This must be one I have made specifically for 2m APRS playing around.
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[23:19] <Laurenceb__> haha
[23:19] <Laurenceb__> get rid of them
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[23:22] <Lunar_Lander> xD
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[23:30] <gonzo_> bugger, two balloons in the air and my 70cm system is down
[23:34] <fsphil> just one up
[23:34] <fsphil> it's doing that aprs thing
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[23:45] <Herman-PB0AHX> i go sleep gn all
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[00:00] --- Wed Oct 30 2013