highaltitude.log.20140510

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[00:31] <Laurenceb_> ultimate kickstarter idea
[00:31] <Laurenceb_> 3d printer analytical engine
[00:31] <Laurenceb_> *printed
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[00:55] <aadamson> Laurenceb__, as my wife would say - "you are out of control" :)
[00:56] <aadamson> So I'm not buying this powerfilm solar cells are better discussion that has been tosed about
[00:56] <aadamson> tossed
[00:56] <aadamson> I just ran and A/B test, granted not in direct sunlight so I'll reserve final comment until I do that
[00:57] <aadamson> 2 - 1x3 (inch) .5V solar cells in parallel plugged into the spv1040 controller, to a 3.6v (kinda discharged) lipo 200mah battery
[00:58] <aadamson> generates 22ma of current flowing *into* the battery with a meter connected between the spv1040 controller and the battery
[00:59] <aadamson> a single MP3-37 (this is the big what they claim at 3v, 50ma cell) connected to the exact same with the exact same source of light to the same battery (swapping them immediately), generates 9ma and is nowhere near 3v, it's more like 1.3-1.5
[00:59] <aadamson> BTW, it's static, not connected to anything voltage is 3.6v
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[01:00] <aadamson> ..... So, granted I ran crystal cells and one of the powerfilms
[01:00] <aadamson> but the powerfilm was suppose to be 3v and 50ma...
[01:01] <aadamson> So I'm thinking the crystal cells are *still* the better option - again, I reserve final opinion till when I can make a direct sunlight test.
[01:02] <aadamson> ^ran 2 crystal cells and one ...
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[01:15] <aadamson> and one final summary. I tested a second powerfilm cell just to make sure the first wasn't bad... same results... NOW
[01:16] <aadamson> 2 powerfilms in parallel (these are the larger ones) was actually better current wise than the 2 crystal cells, so a direct sunlight test will be interesting
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[04:13] <x-f> Reb-SM3ULC, B-50 in your range
[04:21] <x-f> Vostok, looks like B-50 will fly very close to you, are you ready for it this time?
[04:50] <Maxell> morning
[04:52] <x-f> morning
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[05:27] <x-f> burst? :/
[05:45] <Maxell> Looks like it :(
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[05:48] <Maxell> Leo should add "burst detection". It would increase it's packet rate so we can gather as much data as possible.
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[05:49] <Maxell> 7059 m.
[05:49] <Maxell> 6881 m.
[05:49] <amell> What happened to b50?
[05:49] <Maxell> 6825 m.
[05:49] <x-f> didn't survive the sunrise
[05:49] <Maxell> Oh, is it already doing that?
[05:49] <amell> Burst?
[05:50] <x-f> Maxell, i think it's just a coincidence, because its battery has been charged enough already
[05:51] <Maxell> x-f: ok
[05:51] <Maxell> 6593 m. It's leaking for sure.
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[05:58] <Maxell> 5597 m.
[05:59] <x-f> -0.0 deg elevation, still greens
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[06:11] <Maxell> x-f: gone I presume?
[06:11] <x-f> got one just now :)
[06:11] <x-f> second
[06:11] <x-f> -0.4
[06:12] <Maxell> :o
[06:12] <Maxell> http://aprs.fi/#!mt=terrain&z=5&call=a%2FM0XER-10&timerange=86400&tail=86400 :)
[06:15] <x-f> last one was red, think that's it from me, now just APRS
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[06:54] <jcoxon> morning all
[06:55] <Maxell> ohhai jcoxon
[06:56] <Maxell> B-50 / M0XER-10: altitude 796 meters 58°02.34' N 20°39.35' E ~20 minutes ago.
[06:57] <jcoxon> oh dear, on its descent
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[06:59] <arko> its swimming with the fish :(
[06:59] <Maxell> jcoxon: yeah since ~05:27 UTC
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[07:10] <Upu> it will be down by now
[07:10] <Upu> and wet
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[07:15] <Maxell> hehe too bad
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[08:24] <mauhen> Morning all, I would like to experiment with contestia, anyone know of a source of arduino code for this?
[08:26] <jcoxon> mauhen, i'm not sure any exists
[08:26] <jcoxon> for arduino
[08:27] <jcoxon> the B-* flights are PIC based i think and LeoBodnar hasn't released code
[08:28] <mauhen> OK, thanks for the info jcoxon
[08:28] <jcoxon> they'll be code in fldigi if you want to see it
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[08:29] <jcoxon> there will *
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[08:30] <jcoxon> mauhen, http://git.berlios.de/cgi-bin/gitweb.cgi?p=fldigi;a=blob_plain;f=src/contestia/contestia.cxx;hb=8e37e6a04e712e549e8b8ff0b4e439594767ba47
[08:30] <jcoxon> not sure if that helps (its beyond me)
[08:31] <mauhen> Its beyond me as well but thanks for looking it up.
[08:33] <mauhen> I will try pasting some of it into the arduino compiler.
[08:34] <SpeedEvil> Anyone want to make a UFO payload?
[08:34] <SpeedEvil> http://www.dx.com/p/singfire-sf-823-9-x-cree-xm-l-t6-6000lm-5-mode-white-memory-bike-light-black-red-12-x-18650-290941
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[08:38] <mfa298> mauhen: I think it's a pretty safe bet that just pasting some of that code into arduino will just result in a lot of compiler errors
[08:39] <mauhen> OK
[08:39] <mfa298> you probably need to read up on how the tones are generated (spacing between tones and time gap between tone changes) and then work out if you can generate those on the arduino with whatever radio module you've got.
[08:40] <mfa298> I know when DominoEX has been talked about we've thought that's possible but you'll need specific hardware and it's potentially pushing the pwm channels and timers towards their limits
[08:41] <mikestir> hehe I've just written a little dominoex modulator - surprised by how easy it was!
[08:42] <mfa298> that code could provide an idea of what you need to acheive but how you do it is likely to be different.
[08:42] <mauhen> OK, it was just a thought, I could not do it from first principles.
[08:43] <mfa298> mikestir: yeah I did DominoEX on the Pi with it's hardware PWM, I think the hardest part was calculating the pwm values to get the right tone shifts (which I think is where doing it on the arduino get's harder due to the limited bits)
[08:43] <mikestir> I'm still waiting for my si4060s to arrive so I've just done it using a little NCO and output via soundcard
[08:46] <mikestir> I think the problem you'll have with something like an NTX2B + arduino is that the tone spacing has to be equal to the symbol rate
[08:46] <mikestir> if you are doing analogue FM then that is going to be hard
[08:51] <mfa298> I think for the arduino and dominoEX you need a series resistor between the pwm out and ntx2b in to reduce the voltage swing between full on and full off to get the voltage steps small enough to get the tone spacings (15.625Hz from memory). although I'm not sure anyones actually implimented it yet it's just been talked about with a it should be possible conclusion.
[08:52] <jcoxon> i think Upu did
[08:53] <mfa298> I know he did it with an dac I can't remember if he did direct from PWM (but he's the most likely person to have tried)
[08:53] <mikestir> how tolerant is it to the spacing being != symbol rate?
[08:54] <UpuWork> did it direct with PWM
[08:54] <UpuWork> just have to pick the right resistor
[08:54] <UpuWork> http://ava.upuaut.net/?p=633
[08:55] <mfa298> looking at the Olivia page that might be slightly easier as for 500/8 it looks like the tone spacing is 31.25Hz
[08:57] <mfa298> mauhen: this might give a reasonable description of how Olivia is done http://en.wikipedia.org/wiki/Olivia_MFSK Contessia is similar to Olivia in how it's transmitted but then has a different charcter set (and possible a few other differences)
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[08:59] <mikestir> I've just tried deliberately adding some offset on this NCO implementation. It can tolerate about 0.4Hz error on the 15.625Hz then it pretty much falls over a cliff edge
[08:59] <mikestir> interestingly even an error very close to that limit doesn't seem to reduce performance when SNR is reduced by summing in some white noise
[08:59] <mauhen> Thanks mfa298
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[09:00] <mfa298> mauhen: upu's link above for dominoEX is probably also useful as it describes the challenges you'll face with the pwm output on the arduino.
[09:01] <mfa298> of course once you've got it working you'll need to add some notes on the wiki on how to do it :)
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[09:04] <mauhen> I would not hold my breath mfa298 :) must sign off now, thanks for all comments
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[09:08] <UpuWork> I would point out I've never flown that Domino
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[09:08] <mikestir> UpuWork: were the resistor values select on test?
[09:08] <UpuWork> you have to play about
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[11:18] <jarod> http://www.flightradar24.com/HBAL189/34923b1 =)
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[11:32] <Willdude123> Operating a station today - GB1WW
[11:32] <Willdude123> Mildly nervous
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[11:34] <mfa298> well you should have someone around to help if you get stuck.
[11:34] <Willdude123> Yeah.
[11:35] <Willdude123> I'll observe what they're doing for a while
[11:35] <Willdude123> Following them on a websdr
[11:36] <craag> Don't be worried about it - people are used to newcomers running special event stations - so just take your time in working out what you're going to say
[11:36] <mfa298> when you say operating them I assume you mean your going to that station and using their kit and callsign (rather than just calling them)
[11:38] <mfa298> but as craag said special even stations are generally good as they want to operate and do it in a way to show off the hobby so actually want to chat and help people out (rather than the, ur 59 003 73s qrz contacts you get in contests)
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[12:05] <Willdude123> mfa298 yarp, going there at half one
[12:06] <mfa298> well there should be a few other hams around (I think a full licensee needs to be there to "supervise" you) so it should be a good opertunity to practice and get advice.
[12:08] <mikestir> Willdude123: got it. I'll listen out for you
[12:08] <Willdude123> Will probably be on from about 2:30
[12:08] <Willdude123> Well, we are going at 1:30 and it's about an hour away
[12:09] <DL1SGP> Willdude :) on which band did you plan to be active again?
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[12:09] <mikestir> they're on 40m at the minute
[12:09] <DL1SGP> ah ok :)
[12:09] <mikestir> some guy called John
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[12:13] <DL1SGP> mikestir: at 7063?
[12:14] <mikestir> 7170.7
[12:14] <fsphil> Willdude123: HF?
[12:14] <DL1SGP> tu mikestir
[12:14] <Willdude123> fsphil, yep
[12:15] <fsphil> might give you a shout
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[12:16] <mikestir> it's pretty weak here - I doubt you'd hear me if I called in on my 8W. must get a rig with a working PA :)
[12:17] <DL7AD> hi
[12:17] <DL1SGP> moin sven
[12:18] <DL7AD> hi felix
[12:20] <fsphil> sky's looking a bit thundery here
[12:23] <mikestir> lol. another windmill station GB2UW
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[13:10] <PE2G> GA all, any ideas why B-50 burst?
[13:14] <sp2ipt> good question
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[13:24] <PE2G> The burst might be related to solar radiation: http://x-f.lv/dev/habitat-graphs/payload/B-50#g/altitude,solar_panel
[13:24] <nats`> it was high maybe the sun heated the balloon to fast
[13:25] <nats`> making it burst by dilatation
[13:30] <PE2G> Possibly. B flights floating at lower latitudes have survived that though
[13:30] <craag> Could have just been a fault in the envelope
[13:31] <craag> Leo makes them by hand
[13:31] <craag> Obviously does rather well sometimes! (B-47)
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[13:31] <wd8mnv> Leo's doing something right
[13:31] <PE2G> Yes, that's why i asked
[13:31] <Laurenceb_> the rise in voltage is due to panel cooling
[13:32] <Laurenceb_> it happens after the burst
[13:32] <Laurenceb_> looks like a bond failure to me
[13:32] <Laurenceb_> unlike B-49 which looked like a bulge growing out of control
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[13:55] <tweetBot> @NORB_HAB: Just put the HAB cutdown equation into action. Cutdown was just a few seconds slower than I expected but worked nevertheless #ukhas RESULT!
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[14:02] <Maxell> mikestir: still on 7170.7 kHz LSB?
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[14:05] <aadamson> - opps - http://sdrsharp.com/downloads/sdr-install.zip
[14:05] <aadamson> ah... wrong link http://sdrsharp.com/
[14:06] <craag> Someone needs to fork it and rewrite the DSP core
[14:06] <craag> fork the GPL stuff
[14:07] <nats`> craag that's the kind of spirit making me sick about opensource
[14:08] <Maxell> nats`: ??? how is forking bad?
[14:09] <nats`> the license of this DSP is not fork compliant !
[14:09] <nats`> they just shared it for edu purpose
[14:09] <nats`> and you can always contribute to it
[14:09] <SpeedEvil> Forking can be bad if it can be avoided
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[14:09] <craag> nats`: To be honest it's great that he's opened access to the code, even if it's got a restrictive license on it
[14:09] <SpeedEvil> As it can dilute the amount of people working on a product
[14:09] <nats`> but as susual many of "well minded" people just violated the license
[14:09] <craag> He could have kept it proprietary
[14:09] <nats`> yep craag and I know him
[14:10] <nats`> if people go to see him with patch he is pretty happy
[14:10] <nats`> but just cloning indefinitely a code is plain silly and loss of time
[14:10] <mfa298> look at the large number of different versions of dump1090 that all work in slightly different ways if you want an example of why forking can be bad.
[14:10] <nats`> or like SpeedEvil sayd it better
[14:10] <nats`> forking is bad when the only reason is being egomaniac
[14:11] <nats`> why fork when you can contribute, just to have your name on top
[14:11] <nats`> that's all
[14:11] <mfa298> forking usually only makes sense if the aim is to add functionality that then get's pushed back to the original. when you have lots of forks all doing slightly different things then that's bad.
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[14:12] <craag> nats`: That's cool. I can see the issue people have with it, and the misunderstanding of open source doesn't mean you can copy it.
[14:12] <nats`> yep
[14:12] <craag> But from his point of view - he's opened his code up to people
[14:12] <nats`> it's a problem BSD already had with linux many time
[14:12] <craag> and if he's accepting patches then it's not like he's being malicious
[14:12] <nats`> he's not
[14:13] <craag> Just trying to protect his IP
[14:13] <nats`> he could have keep all this implementation for himself
[14:13] <nats`> a really smart one for once and really easy to understand
[14:13] <nats`> which is hard to find in DSP world
[14:13] <nats`> anyway the worst part is this kicksat stuff
[14:14] <nats`> they clearly stole the code for a project making fundraising on kickstarter
[14:14] <craag> mm
[14:14] <nats`> and that's....... that's really crappy
[14:14] <craag> Yeah
[14:14] <DL7AD> dd
[14:16] <mattbrejza> what liscence is the dsp under?
[14:16] <nats`> microsoft opensource license
[14:17] <nats`> don't remember the name
[14:17] <nats`> you can see it but not reuse it
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[14:17] <craag> can't remember exactly but: Only viewable for education, copying, modification, reuse not permitted.
[14:17] <mattbrejza> ok
[14:17] <craag> So like watching a movie at the cinema I guess!
[14:18] <nats`> yep but you can modify for personnal use (not redistribute)
[14:18] <nats`> or even submit patch
[14:18] <craag> oh
[14:18] <nats`> if you really makes things better
[14:18] <mattbrejza> has kicksat stopped using his code?
[14:18] <nats`> don't know
[14:18] <nats`> I didn't follow all of this more
[14:20] <nats`> have to go :)
[14:21] <nats`> bye and nice week end all the balloon trackers :D
[14:26] <mattbrejza> oh kicksat was the one that failed due to 'radiation' and lack of reliable rtc
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[15:28] <Earthshine> Evening
[15:29] <Earthshine> Just checked the CUSF twitter feed and according to that the last launch was June 2013? Is that right?
[15:30] <jonsowman> adamgreig: ^?
[15:30] <jonsowman> sounds about right
[15:30] <Earthshine> Wow
[15:30] <adamgreig> haha hmm
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[15:30] <jonsowman> HAB is a bit out of fasion in cusf these days
[15:30] <Earthshine> There used to be regular launches
[15:30] <jonsowman> rockets are cooler
[15:30] <Earthshine> What happened?
[15:30] <adamgreig> so
[15:31] <adamgreig> we launched like a few weeks back
[15:31] <adamgreig> and regularly previously
[15:31] <adamgreig> but not our own payloads
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[15:31] <adamgreig> mostly internal development has been on a hybrid rocket motor, a few really big serious rockets, the HAB prediction software, a thrust vectored rocket and some other bits
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[15:31] <adamgreig> we haven't had many people interested in building HAB payloads in the last few years
[15:32] <adamgreig> so consequently not many CUSF launches
[15:32] <Earthshine> I'm very surprised about that
[15:32] <adamgreig> our launch site still gets a reasonable bit of use
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[15:32] <adamgreig> but I guess we have a lot of rocket people these days and fewer balloon people
[15:32] <adamgreig> once upon a time people also had the view that we'd done most of the things that were interesting to do with habs
[15:32] <Earthshine> Do you guys still get Helium from BOC?
[15:32] <adamgreig> but I think that view has been proven pretty conclusively wrong by leo's work
[15:33] <adamgreig> BOC are still a sponsor of CUSF
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[15:33] <adamgreig> we are actually planning on having a hab launch in the next month or so
[15:33] <adamgreig> for someone's cartographic project
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[15:33] <SpeedEvil> Tehre is still lots to be done in balloon-balloon comms, for example
[15:33] <adamgreig> looking at building maps from HAB data in developing communities
[15:33] <SpeedEvil> And actual pointed cameras
[15:33] <adamgreig> SpeedEvil: perhaps
[15:34] <adamgreig> b2b comms might be fun
[15:34] <adamgreig> but I think ukhasnet has a cooler outlook on that
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[15:34] <adamgreig> Earthshine: is that so surprising? we did an awful lot of balloon stuff but the nature of student societies is constant flux of students, so interests change
[15:34] <adamgreig> we're spaceflight society, not HAB society, after all
[15:34] <adamgreig> gotta keep pushing the envelope ;)
[15:35] <adamgreig> this rocket atm is a 3m tall affair that does mach 3.5 or so and >20G of acceleration
[15:35] <adamgreig> which is a fun and different challenge :P
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[15:37] <Earthshine> What kind of altitude do the rockets get to though?
[15:38] <adamgreig> varies. less than HABs, at the moment. this one's looking like 13km
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[15:39] <adamgreig> so the photos are a bit less pretty
[15:39] <Earthshine> That is still pretty impressive
[15:39] <adamgreig> but the videos are a bit more exhilarating
[15:39] <Earthshine> and i'm guessing they are way more expensive than the HABs
[15:40] <adamgreig> oh yes.
[15:40] <adamgreig> quite substantially
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[15:41] <adamgreig> http://www.cusf.co.uk/2012/05/martlet-1-launch-videos/
[15:43] <Earthshine> That's really cool
[15:43] <adamgreig> they are soo cool
[15:43] <adamgreig> you can see the appeal
[15:43] <adamgreig> I'm working on the electronics for martlet 2 right now
[15:44] <adamgreig> and designing things that will definitely work in 20G accelerations with high reliability is quite fun
[15:44] <Earthshine> I bet
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[15:45] <adamgreig> we'll be back to balloons eventually
[15:45] <adamgreig> I have radio plans
[15:45] <Lunar_Lander> hello
[15:45] <craag> afternoon Lunar_Lander
[15:45] <Lunar_Lander> how are you all?
[15:46] <Earthshine> I'm hoping to resurrect my HAB project later in the year
[15:46] <Lunar_Lander> cool!
[15:47] <Earthshine> Hi Lunar_Lander
[15:48] <Lunar_Lander> hi Earthshine
[15:48] <Lunar_Lander> nice to see you back
[15:48] <Lunar_Lander> :)
[15:53] <Earthshine> :)
[15:54] <es5nhc> Eh? B50 burst over Baltic Sea? :(
[15:55] <es5nhc> I just now got the time to check the spacenear, been busy with thunderstorms
[15:55] <craag> A balloon bursting - such a shock :P
[15:56] <DL1SGP> :D
[15:57] Action: SpeedEvil looks at his 500G centrifuge
[15:57] <SpeedEvil> Made by hotpoint.
[15:58] <es5nhc> And wow... B47 approaching Japan?
[15:58] <es5nhc> It's transmitting via APRS, right?
[15:59] <SpeedEvil> Has anyone plotted all the tracks of b* onto a globe?
[16:00] <SpeedEvil> It would be amusing to do so - with the linewidths of LOS
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[16:15] <craag> es5nhc: B-47 should be approaching US west coast sometime this weekend
[16:15] <craag> (we hope)
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[16:27] <chrisg7ogx> what is the icarus settings please?
[16:27] <Upu> just a test
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[16:27] <chrisg7ogx> Aw all excited then!
[16:27] <Upu> if you see Icarus its just someone playing back the wav file from the Wiki
[16:28] <chrisg7ogx> Radio amateurs asked to help find geese Very urgent. The 'Puy du Fou' is one of the most beautiful parks in the world. Radioamateurs-France was contacted this morning because the birds are gone yesterday. The birds (geese) are equipped with beacons on the VHF band. Please, listen for them on frequencies in the 155Mhz band. 155.102 155.119 155.139 155.181 155.199 155.220 155.239 155.260 155.318 Please contact Radioamateu
[16:29] <chrisg7ogx> I think the prevailing wind is too strong for a UK bound flight
[16:29] <adamgreig> hehe
[16:29] <adamgreig> silly geese
[16:30] <Upu> no flight doc
[16:30] <chrisg7ogx> lol
[16:30] <chrisg7ogx> send me the bill!
[16:32] <chrisg7ogx> I suppose a signal at that frequency would still propagate through pastry?
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[16:36] <Laurenceb_> return them as pie ?
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[16:37] <chrisg7ogx> i like it Laurenceb
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[18:32] <SV1NJX> Hello
[18:33] <Lunar_Lander> hello
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[18:34] <SV1NJX> J43VHF Team will launch a HAB from KM17BJ , Sunday 11 May about 08:00 UTC. APRS telemetry (J43VHF-11), cw beacon 144.041, cw beacon 28.055 / http://j43vhf.wordpress.com
[18:36] <DL1SGP> kali spera SV1NJX and thanks for the info
[18:37] <SV1NJX> Kalispera, hope to see you in the air (PSE QSL)
[18:38] <SV1NJX> Also QRV J43VHF 7.160 Mhz +- QRM
[18:38] <DL1SGP> My buoyancy is not good enough for getting to float or into air myself, however I hope you catch my airwaves some day when they bounced of the sky into lovely greece
[18:38] <SV1NJX> always welcomed :)
[18:39] <DL1SGP> :)
[18:40] <DL1SGP> will the HF beacons contain telemtry or just be "still-alive" markers SV1NJX
[18:40] <SV1NJX> hidden message ;)
[18:40] <SV1NJX> telemetry only by aprs
[18:44] <DL1SGP> ok
[18:45] <SV1NJX> good night
[18:45] <SV1NJX> 73
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[19:03] <fsphil> time to call it quits on B-47?
[19:04] <mikestir> wasn't it only supposed to be getting towards land around 1800Z tonight?
[19:05] <mikestir> and it could be late
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[19:10] <x-f> and it could be above 12100 meters :)
[19:14] <Laurenceb_> might be worth waiting until sunset
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[19:25] <DL7AD> Laurenceb_: it should arrive at 2200Z. that has been my last calculations at midday.
[19:26] Action: x-f crosses fingers.
[19:27] <Willdude123> GB1WW was fun
[19:28] <craag> Willdude123: Good to hear!
[19:29] <craag> Did you get much time on air?
[19:29] <Willdude123> No.
[19:29] <Willdude123> Only about half an hour
[19:29] <Willdude123> I got too awkward so took a break
[19:29] <craag> that's a fair chunk!
[19:29] <Willdude123> But the guy after me took a while
[19:29] <Willdude123> I think I did half an hour
[19:29] <Willdude123> I think I worked France, and The Netherlands
[19:30] <craag> nice :)
[19:30] <Willdude123> craag, is BARC doing an HF field day with SUWS?
[19:30] <Willdude123> Or did you just do VHF
[19:30] <craag> That is correct
[19:30] <craag> ah jsut VHF
[19:31] <craag> were meant to do HF, but we were all busy tht wkend
[19:31] <Willdude123> Would it be OK for me to come for a couple of hours
[19:31] <craag> We'll be doing VHF again this year though
[19:31] <craag> sure
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[19:33] <craag> We're quite relaxed about it, which annoys some of the keen contesters, but keeps us sane!
[19:35] <Willdude123> craag, I take it you use your own calls?
[19:40] <craag> Willdude123: We use the club call, G3KMI
[19:40] <craag> Kilowatt-Minimum-Input
[19:40] <craag> ;)
[19:40] <myself> hah
[19:42] <craag> old club shirt circa 1990
[19:42] <craag> http://www.suws.org.uk/images/e/e3/OldG3KMI_tshirt_back.jpg
[19:42] <Upu> hey craag up for another Foundation exam this year ?
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[19:43] <craag> Upu: Yeah sure
[19:44] <Upu> super
[19:44] <Upu> just putting stuff together
[19:46] <Willdude123> craag, I must admit I did say "59" when it wasn't.
[19:47] <Willdude123> But it was more because I was nervous than just trying to be efficient
[19:49] <craag> Meh, when you're doing VHF NFD people will actually get annoyed quick if you start giving out 58, 47 etc
[19:49] <craag> "Oh, the software fills in 59 and I don't know how to change it, can we go with that?"
[19:49] <craag> ^^ heard last year
[19:52] <cm13g09> evening craag
[19:53] <cm13g09> craag: Henry was trying to get hold of you earlier.....
[19:53] <craag> good evening cm13g09
[19:53] <craag> yes I got in touch with him
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[19:53] <craag> I was asleep..
[19:53] <cm13g09> lol
[19:53] <cm13g09> ok
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[19:54] <cm13g09> fair enough
[19:54] <cm13g09> he and I were both in Swanage....
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[20:20] <aadamson> Upu, have you done any testing with Lipo/Solar and adjusted the VD no the spv1040?
[20:20] <aadamson> I was just trying to figure out why I can't get a lipo to go above 4.0v
[20:21] <aadamson> then I look at the VD and the formula in the data sheet.
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[20:21] <aadamson> a 22k/10k divider is going to limit the output voltate to 4.0v... duh
[20:21] <aadamson> I kept wanting to see 4.2 or higher, but with that divider you can't get there from here :)
[20:22] <aadamson> so now trying to figure out what I have in smt resistors that I can change too
[20:22] <aadamson> voltate = voltage... :)
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[20:32] <Rb1203> Who sent up the Icarus?
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[20:36] <daveake> Nobody. It's a test
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[20:38] <Upu> I killed it
[20:38] <Upu> Poor Rob if he ever does another launch
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[20:38] <daveake> haha
[20:38] <Upu> people will just think its a test and not bother
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[20:53] <Belleas> Hi Guys,
[20:53] <Upu> evening Belleas
[20:53] <Belleas> I created a tracker a while back and my laptop died. I am now getting back into it but am having trouble decoding the rtty
[20:54] <Belleas> http://i1266.photobucket.com/albums/jj526/Belleas1984/Dl-Fldigi_zpsdfd8a365.jpg
[20:54] <Belleas> if anyone has any ideas
[20:54] <Belleas> annoying as it use to work :(
[20:54] <Upu> thats a very wide shift
[20:54] <Upu> whats the transmitter ?
[20:55] <Belleas> the ntx2
[20:55] <Upu> press RV see if that fixes it
[20:55] <mfa298> change the rtty dropdown box (top left) to rttyr or usb
[20:55] <mfa298> *or* RV as Upu suggested (but not both)
[20:56] <Belleas> ok, 5 secs
[20:57] <DL7AD> uk :D
[20:59] <Belleas> yeah ... bright spark here closed everything down and is now getting an error ... more than 5 secs :)
[20:59] <Upu> use dl-fldigi in hab mode as well
[20:59] <Upu> should be a second icon
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[21:09] <Belleas> im back, had to reboot :(
[21:10] <Belleas> set it to RTTYR and getting a nice clean read now
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[21:10] <Belleas> cheers for the help guys ... you rock
[21:11] <Upu> you need to bring the shift down
[21:11] <Belleas> i was going to ask that
[21:11] <Upu> how are you driving the NTX2 ?
[21:11] <Upu> which example did you follow ?
[21:11] <Belleas> is that the resister
[21:11] <Upu> yes
[21:11] <Belleas> arduino
[21:11] <Upu> did you follow the example code on the UKHAS Wiki ?
[21:11] <Belleas> whats normal, about 435?
[21:12] <Belleas> yes
[21:12] <Upu> or the one on my blog ? or none of the above ?
[21:12] <Belleas> its the one on the HAB site
[21:12] <Upu> ok its going to be the resistor
[21:12] <Upu> 5V arduino ?
[21:12] <Belleas> it is yeah
[21:13] <Upu> what value is your resistor ?
[21:13] <Belleas> i knew you were going to ask that, i built it 6 months ago and used whatever is at hand
[21:13] <Upu> whats the colour bands on it ?
[21:13] <Belleas> i think a 10k
[21:13] <Upu> ah its too low
[21:14] <Upu> put 4 of them in series
[21:14] <Upu> also have a read of http://ava.upuaut.net/?p=617
[21:14] <Belleas> awesome
[21:14] <Upu> its a newer version of the UKHAS Article
[21:14] <Upu> which I promise I'll copy across
[21:15] <Upu> at some point
[21:15] <aadamson> yeah, fixed that a 430K and a 180K give me 4.236v charged to the 1S lipo...
[21:15] <Belleas> ok cool. its been ages so i am just getting my head back around it
[21:15] <Upu> hey aadamson
[21:15] <Upu> glad you sorted it
[21:15] <aadamson> they anthony
[21:15] <Upu> sure Belleas nps
[21:15] <aadamson> you might want to make that correction to your schematic
[21:15] <aadamson> too
[21:15] <aadamson> or your lipo is only going to reach 4.0v
[21:16] <Upu> I think I'd changed it actually
[21:16] <aadamson> btw, one think I'll give the powerfilm cells... they are no temp sensative
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[21:16] <Belleas> ill let you know how i get on. laters guys :) thanks again for the help
[21:16] <Upu> cheers Belleas
[21:16] <Upu> say that again in English aadamson
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[21:17] <aadamson> ah, well the 22k/10k that you had in your original and your schematic, needs to be changed... but you can't use my values as you pull your ADC tap off that point so you'll have to deal with impedance
[21:17] <aadamson> upu... did you see my notes on powerfilms from overnight *your time*
[21:17] <Upu> nope
[21:17] <aadamson> ah... well, they don't seem to be better in fact worse that crystal cells
[21:17] <aadamson> I ran back to back tests
[21:17] <Upu> they are nice and light though
[21:18] <Upu> and hard to damage
[21:18] <aadamson> even tho they say 3v at 20-50ma...
[21:18] <aadamson> aint no way
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[21:18] <aadamson> the 3v 50's that I had gave half the charge current as the .5v *who knows what current* crystal cells
[21:18] <Upu> I have no data
[21:18] <aadamson> 2 crystal cells are approx 22ma of *charge current going into a 3.6v lipo
[21:19] <Upu> as I have no sun
[21:19] <aadamson> same batter, with 2 22ma 3v mp3-25's, are 9ma
[21:19] <Upu> seriously I've been trying to test these for 4 months
[21:19] <aadamson> and the voltage into the control wasn't 3v, it was 1.5
[21:19] <craag> lol Upu
[21:19] <craag> If only there was a way to lift them above the clouds...
[21:19] <aadamson> 2 cells in parallel in both tests btw
[21:20] <aadamson> NO, I will reserve final comment, as I didn't have sun either
[21:20] <aadamson> 500W halogen was my sun for the test
[21:20] <aadamson> but I'm putting money on they being no different in bright sun
[21:20] <aadamson> yes I will give you that... the flexibility is nice
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[21:21] <aadamson> and a hard rain isn't going to shatter them
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[21:23] <aadamson> btw - upu - http://www.evernote.com/shard/s159/sh/e802e6b1-cf7e-4636-abda-38c695e464a0/10477000dc2fee1cce6d31d9dffb8f26
[21:24] <aadamson> whether that will hold in flight I don't know, but an outside test was pretty promising on re-starting the gps *warm*
[21:27] <aadamson> mikestir, wow, amazing how this little L1 just idles along... I'm running it at 32mhz and with gps being polled on 1 second intervals, and afsk running on background timers, doing everything processing gps, beacon, etc... my loop times worst case is 8ms (and that only happens when I build the *strings* up to beacon, it's non blocking so when when I say go, it beacons in the background
[21:27] <aadamson> I'm pretty happy so far with how little processor is actually needed for this stuff
[21:27] <aadamson> or so it appears
[21:29] <aadamson> I've tried to do everything in background - ADC, temp sensor, DDS timers, both baud and DDS, UART, SPI
[21:29] <aadamson> Pretty much everthing in background except for the 1 second loop to poll the gps and set a few states along the way.
[21:30] <aadamson> oh, and stop mode, it's in the forground for obvious reasons :)
[21:32] <mikestir> aadamson: sounds good. My parts still haven't arrived from Mouser so I haven't been able to do much yet. I did test the boost converter which seems to work very nicely
[21:32] <aadamson> which chip did you use?
[21:33] <aadamson> I forget
[21:33] <mikestir> MCP1640
[21:33] <mikestir> works fine at 0.6V
[21:33] <aadamson> ah same one that someone else suggested
[21:33] <aadamson> yeah both of mine work to .6V no problem, one the TI one goes to .5
[21:33] <aadamson> which really doesn't matter because you are never going to get there or if so, only for about a second :)
[21:33] <aadamson> while the battery crashes
[21:36] <mikestir> I've got the mcu on there as well, but I can't even do an LED blinky because I haven't got the 0.05" pitch programming headers
[21:38] <mikestir> aadamson: got given one of these the other day: http://www.atmel.com/tools/ATSAMA5D3-XPLD.aspx
[21:38] <mikestir> on paper they are nice and low power for what it can do
[21:39] <aadamson> oh, you talking the 10pin header?
[21:39] <mikestir> yes
[21:39] <aadamson> yea I found some nice ones of those from digikey - pretty cheap too
[21:39] <mikestir> harwin m50 or something
[21:39] <aadamson> I forget what the issue is with Atmels ARM implementation, but no-one that I know likes it very much
[21:40] <mikestir> last one I used was the SAM7 and that was ok
[21:40] <mikestir> this is more of a replacement for their ARM9s
[21:41] <aadamson> I used this one - http://www.digikey.com/product-search/en?keywords=609-3729-ND
[21:41] <mikestir> yeah that's basically the same
[21:41] <mikestir> it's on a snap off anyway so size isn't a big deal
[21:41] <aadamson> there were 2 one with a thicker plastic base, and I wanted the thinner one
[21:42] <aadamson> ah... mine is on the bottom of the board and I have a *press on* connector to program them without soldering it on.
[21:42] <aadamson> my dev board has it soldered obviously
[21:43] <aadamson> and my best investment... 10 2W sma 50 ohm dummy loads from china via ebay :)
[21:44] <mikestir> did you use tag connect for the press-on?
[21:45] <aadamson> now, just some pogopins and a little thing I'd built for another project
[21:45] <aadamson> now = no
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[21:46] <aadamson> I got my mouser parts today and duh, I forgot to order one thing... not a big deal, but I had it when I do that
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[21:47] <mikestir> I was expecting my stuff on friday, but instead of loading it on a van they seemed to manage to fly it to the other end of the country and then drive it back again, so I guess it will be Monday
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[21:49] <aadamson> ah, too bad... don't ya hate it when you have time on the weekend and yet you *can't play* :)
[21:50] <aadamson> I *should* build another board tonight, but we'll see if I do :)... (and it's not that hard with a stencil and oven ... lol)
[21:50] <mikestir> I'm hand soldering - I left a big via for the QFNs
[21:50] <mikestir> seems to have gone ok with the mcu
[21:50] <aadamson> my eyes aren't that good :)
[21:51] <aadamson> simple mylar stencil, paste and toaster just work too good... I do need to break down and get a real oven
[21:51] <aadamson> upu you still good with the one you got?
[21:51] <Upu> its ok
[21:51] <Upu> occasionally sets fire to stuff
[21:51] <mikestir> toast?
[21:52] <aadamson> OMG, you are kidding me... maybe I'll stay with my Black and Decker then, I've never had that problem
[21:52] <Upu> http://i.imgur.com/KUAJWHy.jpg
[21:53] <aadamson> yikes those LED's are looking a little toasty. I don't like it when they turn *yellow*
[21:53] <aadamson> hmm...
[21:53] <Upu> screw the LED's look at the resin :)
[21:53] <aadamson> so what do you think happened? That looks like FOD or some such on there?
[21:53] <aadamson> yeah saw that
[21:54] <aadamson> from the waffer?
[21:54] <Upu> yep
[21:54] <Upu> I'd run 2 boards previously and hadn't let it cool down
[21:54] <Upu> which shouldn't have been an issue
[21:54] <Upu> but China
[21:54] <aadamson> so you know there is a *kit* for that oven that is supposed to improve it greatly, problem is the kit costs as much as the oven
[21:55] <aadamson> new controller and display I think
[21:55] <Upu> well its cheap
[21:55] <aadamson> and thermocouples, etc
[21:55] <Upu> it normally does ok
[21:55] <mikestir> Upu: how are you for MAX7Cs? I was going to get a few
[21:55] <aadamson> the complaint that I continue to hear is *hot spots* and it appears you found one :)
[21:55] <Upu> loads mikestir
[21:56] <aadamson> are those hackvana boards upu?
[21:56] <Upu> yeah
[21:57] <aadamson> can he do enig?
[21:58] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/PAVA9/Scan035.jpg
[21:58] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/PAVA9/Scan034.jpg
[21:58] <Upu> that one
[21:59] <aadamson> there ya go... enig :)
[21:59] <Upu> pretty cheap
[21:59] <Upu> I think 20 of those cost me $100 or something
[22:00] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/PAVA9/IMG_1498.JPG as the frame
[22:00] <aadamson> so, when you gonna fly something again?
[22:01] <Upu> Working on the code atm
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[22:01] <mikestir> I got 10 of mine for £8.60 :)
[22:01] <aadamson> btw, is that coilcraft inductor working ok on the spv1040? I like their design much better than the one ST calls for
[22:01] <Upu> thats silly cheap
[22:01] <Upu> yeah aadamson I like them use them all the time
[22:03] <craag> interesting ICSP layout there Upu
[22:03] <aadamson> that's an oh shit layout...
[22:03] <Upu> you can push a 2x3 header in
[22:03] <Upu> without soldering
[22:03] <aadamson> program it, break if off and they say... oh shoot, I need to reprogram it :)
[22:04] <Upu> you can still solder a header back on there aadamson
[22:04] <craag> Upu: Oh, intentional?
[22:04] <aadamson> yes I know
[22:04] <Upu> yup absolutely craag
[22:04] <Upu> saves 54p per board :)
[22:04] <aadamson> I do that all the time with 2xX headers and pads that straddle the board (top/bottom)
[22:05] <Upu> that offset is just enough to hold the header in but let you push it in easily
[22:05] <mikestir> aadamson: I've used a bourns inductor - SRN4018. It's similar size to those coilcraft ones and seems to work ok too.
[22:05] <aadamson> mikestir, thanks I'll make a note of that.
[22:05] <aadamson> I got a handful of 22's and 47's from coilcraft on sample
[22:05] <aadamson> they aren't cheap, but dang I do like how small they are
[22:06] <aadamson> what kinda code ya working on Upu ?
[22:06] <Upu> reading the temp
[22:06] <Upu> needs some timeouts
[22:06] <aadamson> ah, from the si?
[22:06] <Upu> and then APRS which I'll probably need a hand with
[22:07] <Upu> yeah it works but there are no timesouts
[22:07] <Upu> and its hanging the code
[22:07] <Upu> but not had chance to look at it for weeks
[22:07] <aadamson> ah...
[22:07] <aadamson> does your dominoex work, I may lift it ;)
[22:07] <aadamson> just for kicks and giggle
[22:07] <Upu> thor works
[22:07] <Upu> rtty and domino
[22:08] <mikestir> Upu: I was thinking about whether you could stream channel changes to the 4060 fast enough and accurately enough to do generic FM
[22:08] <aadamson> yeah I have thor working already
[22:08] <aadamson> I was looking at your rtty and domino last night
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[22:08] <mikestir> since channel spacing of the order of 4 Hz in 5 kHz peak deviation is a reasonably respectable resolution for audio modes
[22:08] <Upu> well Leo does APRS with SI4060
[22:08] <mikestir> do you know if that's how he does it?
[22:09] <Upu> come back to you on that
[22:09] <aadamson> yea I talked to him about that
[22:09] <aadamson> he modulates the crystal (tcxo) with pwm
[22:09] <aadamson> but he said it was a RPITA to work out the specifics
[22:09] <aadamson> *much* easier with a VCXO :)
[22:10] <aadamson> my latest doesn't even use that
[22:10] <aadamson> it uses the ti dpll, and a txco
[22:10] <aadamson> so I can change the pll freq at will via i2c
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[22:10] <aadamson> and the dpll has a vcxo function as well
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[22:13] <aadamson> upu on your flight controller did you have to drill out some big vias? what are the 2 holes at the bottom right inside the 4 pin header attachment
[22:13] <Upu> which picture ?
[22:13] <aadamson> https://dl.dropboxusercontent.com/u/63720513/Images/PAVA9/Scan034.jpg
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[22:14] <aadamson> btw, when you do aprs, just use Thomas' starting point
[22:14] <aadamson> but there are some changes that you need to make to the si setup
[22:14] <Upu> not sure what you mean ?
[22:14] <aadamson> on that picture
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[22:14] <Upu> yeah
[22:14] <aadamson> at the bottom right of your flight board
[22:14] <Upu> those are test pads
[22:14] <aadamson> the big holes?
[22:15] <aadamson> big = approx same size as the header vias
[22:15] <aadamson> 2 of them
[22:15] <Upu> test pads they aren't holes
[22:15] <Upu> zoom in
[22:15] <aadamson> ah
[22:15] <aadamson> yes, you are right
[22:15] <aadamson> I was zoomed in, but light was good
[22:15] <aadamson> those are copper pads
[22:15] <aadamson> got it
[22:16] <Upu> anyway night all
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[22:16] <aadamson> see ya...
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[22:39] <vk3bq> Andy vk3yt if you are about, successfully decodes $$PS,8,22:38:26,-37.7645,144.9439,314,0.49,7,3,16,4155,010a*5D61
[22:40] <vk3jed> Haven't seen him yet
[22:41] <vk3jed> Vk3bq, what dial freq r u on?
[22:42] <vk3bq> I'm on 434.650, but its a fraction low
[22:42] <vk3jed> Ok
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[22:45] <vk3bq> maybe 434.649800
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[22:46] <vk3jed> Ok, thanks... And what's the tone freq within your passband?
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[22:48] <vk3bq> NFI tony :D
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[22:48] <vk3jed> Very observant :P
[22:50] <vk3bq> that one was lower, but i missed it,
[22:50] <vk3bq> am not in the radio room 100%
[22:50] <vk3jed> Ahh ok
[22:52] <Maxell> Ps still flying?
[22:52] <vk3bq> yes, assume so
[22:52] <vk3bq> only got one full decode so far
[22:53] <vk3bq> missed last one
[22:53] <vk3bq> wasn't at radio and RX was low
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[22:56] <vk3bq> $$PS,10,22:55:10,-37.7353,145.0367,19,0.49,9,3,22,4179,0101*1B63
[22:56] <vk3bq> but it was a failed decode
[22:57] <vk3bq> dial is 434.649343 tony
[22:59] <Maxell> vk3bq: http://www.vk3bq.com/2014/04/07/noisy-home-internet-router/ intresting
[22:59] <Maxell> Might be that it was cheaper to put 100mbit ports for the last two.
[22:59] <vk3bq> they are also gigabit ports.
[22:59] <vk3bq> strange, maybe i got a friday afternoon one,
[23:00] <vk3bq> i have a separate hub now, and just feed from port 1.
[23:02] <vk3bq> another decode $$PS,11,23:01:22,-37.7322,145.0723,2010,0.60,9,3,20,4191,0101*9554
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[23:07] Nick change: Maxell -> Guest13167
[23:09] <Guest13167> If I remember correctly, having the main breaker out didn't improve my noise floor (currently at S7 for 40 meter band). So I can stop looking for noise in my own home.
[23:11] <vk3bq> neighbours with plasma TV's
[23:11] <vk3jed> I saw something just before, but wasn't on the right tone freq
[23:11] <vk3bq> with firkin sharks
[23:12] <vk3bq> 434649340 centre is 1400
[23:12] <vk3bq> for mtg RX
[23:12] <vk3bq> my
[23:13] <vk3jed> Ahh ok, yeah my dial freq is a bit lower than you it would seem
[23:13] <vk3jed> I was on 434649200 with tone at approx 1000 Hz
[23:14] <vk3bq> frequency a fraction higher
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[23:14] <vk3bq> now
[23:15] <vk3jed> K
[23:15] <vk3jed> Come over to #picospace
[23:15] <vk3jed> Andy's thee
[23:15] <vk3jed> There
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[23:37] chrisstubbs (~chrisstub@host86-169-77-94.range86-169.btcentralplus.com) left irc: Quit: HydraIRC -> http://www.hydrairc.com <- It'll be on slashdot one day...
[23:42] Lunar_LanderA (~kevin@p5488AC6F.dip0.t-ipconnect.de) left irc: Quit: Verlassend
[23:59] LazyLeopard (~irc-clien@chocky.demon.co.uk) left irc: Quit: Now QRT
[00:00] --- Sun May 11 2014