highaltitude.log.20080113

[00:16] <Laurenceb> cool
[00:17] <Laurenceb> http://pastebin.com/m7d9d3ed9
[00:17] <Laurenceb> thats my code
[00:18] <Laurenceb> it reads a logfile and plots it, if theres no new data for 30 seconds it quits
[00:19] <Laurenceb> its like a really slow oscilloscope :P
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[09:41] <mc-> morning jc
[09:44] <jcoxon> good morning mc-
[09:53] <mc-> been catching on the logs, I've got some SSII modules
[09:54] <mc-> I'll get them reflashed to work >60kft
[09:54] <mc-> how's your robot?
[09:59] <jcoxon> oh i thought the SII worked above 60 anyway
[09:59] <jcoxon> robot is on hold right now
[09:59] <jcoxon> but i built a QFH antenna yesterday
[09:59] <jcoxon> to recieve weather sat
[10:02] <mc-> what frequency is that at?
[10:02] <mc-> I think SS2 does work >60kft but the wallio site isn't so sure.
[10:05] <jcoxon> 137.5
[10:05] <jcoxon> well we've definitely had > 60k
[10:06] <jcoxon> peg I and III did it (though only just)
[10:06] <jcoxon> and they had sirfII
[10:06] <jcoxon> and i think mihab II did also
[10:06] <jcoxon> well its something to test
[10:15] <mc-> I won't bother reflashing then. How did you build your antenna?
[10:16] <mc-> I've made a sleeved dipole before using a piece of coax
[10:17] <jcoxon> pvc piping for the frame
[10:17] <jcoxon> then coax
[10:18] <jcoxon> its more the connecting the lines correctly
[10:19] <mc-> do you have a weathersat radio?
[10:19] <jcoxon> yup
[10:19] <jcoxon> neontube found 3 in his loft and gave me one
[10:19] <jcoxon> its very old, but seems to work
[10:19] <mc-> are you planning any ocean trips then on your yacht?
[10:20] <jcoxon> going to wire up a 3.5mm jack so i can put the audio into my computer and actually download the images
[10:20] <jcoxon> mc-, sadly not
[10:21] <mc-> I was on a yacht once (not mine) in a storm in the bay of biscay..saw it coming on a weatherfax
[10:24] <jcoxon> hmmmm, i need to work out if i need to do mono or stereo
[10:25] <mc-> mono is all that's required (I think)
[10:25] <mc-> since the radio has an IF filter
[10:26] <jcoxon> that makes sense
[10:28] <mc-> it must have cost millions to put up that sat, now you can decode for free on a PC
[10:28] <jcoxon> yeah, it seems they are shifting away from this freq
[10:28] <jcoxon> to high freqs which they stream better detailed pictures
[10:30] <mc-> still have to pay for the yacht, though I saw a guy on the net building his own.
[10:30] <mc-> first he built a barn, so he could build the yacht
[10:30] <jcoxon> :-)
[10:31] <mc-> he used ebay to buy the bits..
[10:31] <jcoxon> would be cool to go on an expedition say in the sahara and have be able to get weather sat pictures
[10:31] <mc-> not such a problem with weather there though...
[10:32] <mc-> hot hot hot
[10:33] <jcoxon> pushing that idea along, it would be a useful thing for people living there, could know when rain was coming
[10:35] <mc-> true, but why not contact them by radio to say the rain is coming. There's a SW radio kit for $11 now.
[10:35] <mc-> maybe the Gates foundation would pay for something, especially if it saves lives/improves agriculture
[10:36] <jcoxon> self sufficieny?
[10:36] <jcoxon> though it does rely on the sats staying up
[10:37] <mc-> is there any balloon application for the developing world?
[10:38] <mc-> I guess there's no GSM outside the cities?
[10:38] <jcoxon> no, but they had a lot more radio bands :-)
[10:38] <jcoxon> they have suprisingly good gsm coverage actually
[10:38] <jcoxon> a mobile phone is the thing to have, in hot africa they have very good solar panel stations
[10:39] <jcoxon> well weather stuff would be useful
[10:39] <jcoxon> guided parafoils could be used to drop aid into famine aeras
[10:39] <jcoxon> areas*
[10:40] <mc-> delivering medicine would be very useful
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[10:47] <neontube> morning all
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[10:51] <mc-> morning neontube
[10:51] <neontube> how r
[10:51] <neontube> u
[10:51] <mc-> ok
[10:52] <mc-> do you know much about radio?
[10:52] <mc-> I want to build a receiver for 50MHz band
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[10:55] <neontube> i don't know alot about building recivers
[10:55] <neontube> whats at 50mhz that u want to use?
[10:56] <mc-> ham band
[10:56] <mc-> also want to build a tx
[10:57] <neontube> reciver (assuming u don't want small) i would buy a used scanner
[10:57] <jcoxon> hey neontube
[10:57] <neontube> TX... can u transmit o 50mhz with/out a licence ?
[10:57] <neontube> hi james, how goes it
[10:57] <jcoxon> what sort of voltage comes out of the receiver?
[10:57] <jcoxon> i've built my antenna
[10:58] <neontube> its just audio...
[10:58] <jcoxon> as i measured it as 11v!
[10:58] <jcoxon> didn't want to plug it in and watch things go bang
[10:58] <neontube> i think it may have a power pin... from what i remeber from my BBC days, the BBC could turn the tape player on and off
[10:58] <mc-> no, can't tx at 50MHz without license
[10:59] <neontube> use a cheap speaker / headphones tp find the audio pin... outer casing is 0v-gnd
[10:59] <neontube> jc: u got a pic of this antenna then ?
[11:01] <jcoxon> i'll stick one up in a sec
[11:01] <jcoxon> want to get this cable sorted
[11:03] <jcoxon> pin 1 gives out 11.8v
[11:03] <jcoxon> and the rest, nothing
[11:03] <mc-> audio signal is 0.1V AC
[11:03] <mc-> make sure meter is on AC
[11:04] <jcoxon> thats probably what i'm doing wrong
[11:04] <mc-> done it myself before
[11:07] <jcoxon> bbiab
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[11:11] <neontube> wb
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[11:15] <neontube> lol my g/f has jut come in... and asked how long had 'that' antenna been in the garden (the big dipole one for weather sat)
[11:15] <neontube> its been there 2 weeks at least
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[11:29] <neontube> jcoxon: hae u found the audio yet
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[11:37] <jcoxon> yup, got it
[11:37] <neontube> cool
[11:37] <jcoxon> that damn din connector was difficult to solder to
[11:37] <neontube> lol
[11:38] <neontube> i used an old lead that had all the pins populated, cut the other end off and soldered to that insted
[11:39] <jcoxon> the pins just wouldn't take the solder
[11:39] <jcoxon> but i think i've done it
[11:39] <neontube> guy in our office is good at that type of plug... its similar to the econect network used by BBC / acorn computers
[11:39] <jcoxon> i can record static
[11:39] <neontube> :D
[11:39] <neontube> whens the next pass
[11:40] <jcoxon> 5.33
[11:40] <jcoxon> a good website: www.n2yo.com
[11:41] <neontube> http://cgi.ebay.co.uk/I-C-S-FAX-1-weather-system_W0QQitemZ170183465930QQihZ007QQcategoryZ4673QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
[11:42] <jcoxon> going to get this one working first :-)
[11:46] <neontube> :P
[11:46] <neontube> lets see this antenna ten
[11:46] <jcoxon> right all set up
[11:46] <neontube> god this keyboard is rubbish
[11:46] <jcoxon> now to wait
[11:46] <jcoxon> okay,
[11:52] <jcoxon> http://www.flickr.com/photos/jcoxon77/2188701827/
[12:04] <neontube> thats smaller than i thought it would be
[12:04] <neontube> looks good
[12:05] <neontube> ALOT smaller than the dipole thing i've got
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[12:09] <jcoxon> its not perfectly built
[12:09] <jcoxon> made half of it then had to turn it upside down
[12:10] <neontube> bbl
[12:12] <jcoxon> noaa 17 is over
[12:14] <jcoxon> damn it
[12:14] <jcoxon> wxtoimg keeps crashing
[12:30] <jcoxon> hmmmmm, lots of noise
[12:30] <jcoxon> can't seem to get an image
[12:50] <jcoxon> ignore all that
[12:50] <jcoxon> no sats near enough :-)
[12:50] <jcoxon> right better set this antenna up, not on my desk
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[13:53] <jcoxon> bbl
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[16:54] <neontube> anyone in?
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[19:19] <jcoxon> hey guys
[19:19] <jcoxon> got some weather sat pictures
[20:07] <neontube> u got them online ?
[20:08] <jcoxon> http://www.flickr.com/photos/jcoxon77/2190591996/
[20:08] <neontube> sweet
[20:09] <neontube> better than i got
[20:09] <neontube> what software is that
[20:09] <jcoxon> wxtoimg
[20:09] <neontube> on pc or mac?
[20:09] <jcoxon> i've got the registered version
[20:09] <jcoxon> mac
[20:09] <neontube> cool
[20:09] <neontube> i need a mic / line in for the mac
[20:09] <jcoxon> noaa 17 is about to come over
[20:09] <neontube> sweet
[20:09] <jcoxon> yeah i have a griffin imic, usb sound card
[20:09] <neontube> post the results
[20:10] <neontube> i'm going back downstairs
[20:10] <neontube> c u later
[20:10] <jcoxon> okay
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[21:00] <natrium> flickr is down :(
[21:00] <natrium> for a massage
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[21:51] <jcoxon> woohoo
[21:52] <Laurenceb> ?
[21:52] <jcoxon> just one an ebay auction for a yaesu ft-790r radio
[21:52] <Laurenceb> wow
[21:52] <Laurenceb> amazing
[21:53] <jcoxon> won*
[21:53] <Laurenceb> I want one :(
[21:54] <jcoxon> someone bid in the last minute and a half
[21:54] <Laurenceb> how much?
[21:54] <jcoxon> i got it for ?123
[21:55] <Laurenceb> cool
[21:55] <jcoxon> which is a bit more
[21:55] <Laurenceb> thats an ok price
[21:55] <jcoxon> yeah, its okay
[21:55] <jcoxon> means we now have three for ballooning
[21:55] <Laurenceb> I'm trying to open serial ports in octave :S
[22:03] <Laurenceb> bbl
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[22:23] <jcoxon> evening RocketBoy
[22:33] <RocketBoy> hi jcoxon
[22:34] <RocketBoy> I'm just doing some testing - using the GPS simulator - its found a few bugs =:-/
[22:34] <Laurenceb> hey rocketboy
[22:35] <Laurenceb> jcoxon: you can probably offer some advice
[22:35] <Laurenceb> I'm using the ngw100 board, 32MB ram, 16MB flash
[22:36] <Laurenceb> do you think perl, python, or c would be easiest?
[22:38] <Laurenceb> the problem is that with c the code has to be crosscompiled
[22:39] <Laurenceb> I'm thinking of running python on the baord, but it would have to be on the SD card, and be crosssompiled, but theres some guides on how to do it
[22:39] <Laurenceb> what do you think?
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[22:47] <Laurenceb> http://wiki.ukhas.org.uk/code:octave_datalogger
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[22:55] <Laurenceb> http://www.cibomahto.com/?p=82
[22:56] <jcoxon> Laurenceb, don't use python
[22:56] <jcoxon> you won't get the speed you are used to
[22:56] <jcoxon> and it doesn't have brilliant multithreading
[22:56] <jcoxon> run C
[22:57] <jcoxon> RocketBoy, i won that ft-790r auction
[22:57] <RocketBoy> ah good show
[23:00] <RocketBoy> forgot to bid on that CF GPS
[23:04] <jcoxon> haha
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[00:00] --- Mon Jan 14 2008