highaltitude.log.20080922

[00:28] <Laurenceb_> hmf
[00:28] <Laurenceb_> my bootloader is completely dead
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[04:39] Nick change: ShellEvil -> SpeedEvil
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[09:48] <Laurenceb_> hello
[09:49] <gordonjcp> hi
[09:49] <edmoore> hi
[09:49] <SpeedEvil> hi
[09:51] Action: Laurenceb_ has problems with his parafoil board
[09:51] <edmoore> oh
[09:51] <SpeedEvil> :/
[09:51] <edmoore> ?
[09:51] <Laurenceb_> its not responding to the bootloader app
[09:51] <Laurenceb_> theres data going into the uart
[09:51] <edmoore> so you can isp the b/l on, but then can't use it?
[09:51] <Laurenceb_> no
[09:52] <Laurenceb_> sorry bootloader app = application on my pc
[09:52] <Laurenceb_> the code I last flashed it with runs ok
[09:52] <Laurenceb_> I've checked the data lines, the serial appears to be getting to the rx on the uC
[09:53] <edmoore> have you tried the usual reset dance?
[09:53] <Laurenceb_> I'm going to have to remove the avr and swap it for a new one, but I'm worried something is wrong
[09:53] <Laurenceb_> yeah I've been hitting reset like mad
[09:54] <edmoore> no other devices using it at boot?
[09:54] <Laurenceb_> no
[09:54] <Laurenceb_> it could be my flakey usb/rs232 device
[09:54] <Laurenceb_> but theres certainly data coming out of it
[09:56] <edmoore> ftdi rules :)
[09:57] <Laurenceb_> hmm think I'll rip out this uC and see if I can get it back to life with an spi programmer
[09:59] <Laurenceb_> one thing that is confusing me is if gcc knows about the bootloader
[09:59] <Laurenceb_> i.e. I now have 1Kb less flash
[10:00] <Laurenceb_> the weird thing is I' get " return ( (a<<7)|(SPDR>>1) ) & 0x07FF; //11 bit resolution - offset by one bit to the left
[10:00] <Laurenceb_> arggg
[10:00] <Laurenceb_> sorry that should be (.text + .data + .bootloader)
[10:01] <Laurenceb_> when it compiles
[10:02] <Laurenceb_> but there doesnt seem to be an option in avr studio to enter bootloader size
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[10:17] <rharrison_> Moring all
[10:17] Nick change: rharrison_ -> rharrison
[10:32] <edmoore> rharrison: morning!
[10:32] <edmoore> so I basically missed most of yesterday - what's the summary?
[10:33] <rharrison> Sucessfull tethered launch to 120 meters above gound level
[10:34] <rharrison> Got some cool pics and video
[10:34] <edmoore> baby?
[10:34] <rharrison> Yep that was cool. Attached Jack who is one to the balloon using his walking reigns
[10:35] <rharrison> And shot some film for You've been framed moment
[10:35] <rharrison> I'll post it when I edit it a bit
[10:35] <edmoore> grand :)
[10:35] <rharrison> It's 132mb at the moment
[10:35] <rharrison> needs down sizing
[10:36] <rharrison> Few pics from yeasterday on http://www.robertharrison.org/images/icarus/20080921pm/ and a video
[10:36] <rharrison> I think I need to upgrade the camera for some better quality
[10:37] <rharrison> Set a request for sponsorship to Canon, don't hold out much hope though
[10:37] <edmoore> what is it currently?
[10:37] <rharrison> Ixus 400, I'm going to set up wife a570
[10:37] <rharrison> Us that SD card s/w to program it
[10:37] <rharrison> use
[10:38] <edmoore> yeah
[10:38] <rharrison> Should be a lot better than the ixus. But I deally I want to mod it so i can controll it from the avr
[10:39] <rharrison> Single clock source to sync servo and camera function
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[10:39] <rharrison> Morning Laurenceb_
[10:39] <Laurenceb_> hello
[10:40] <edmoore> looks like zeusbot has died
[10:40] <Laurenceb_> I think the problem is I dont understand bootloaders properly
[10:40] <Laurenceb_> can a bootloader overwrtie itself?
[10:42] <Laurenceb_> I'm thinking maybe I flashed it with >15KB of code, and it overflowed the top of flash, corrupting the bootloader
[10:42] <Laurenceb_> is that possible?
[10:47] <Shanuson> if there is nothing that stops writing in that part of flash, sure its possible
[10:48] <edmoore> Laurenceb_: are you still on avr studio?
[10:48] <Laurenceb_> yes
[10:49] <Laurenceb_> Shanuson: interesting, that may very well be the problem if that is the case
[10:49] <edmoore> Laurenceb_: can you sim it to have a look?
[10:50] <Laurenceb_> I've been using v1.7 of this - http://www.societyofrobots.com/bootloader_50_robot.shtml
[10:50] <Laurenceb_> edmoore: well I cant sim all the hardware
[10:51] <edmoore> sure, but you can see if your code runs off the end of the mem, I presume
[10:51] <Laurenceb_> theres a version 2.1 of that bootloader now, apparently some bugfixes
[10:51] <Laurenceb_> yeah, I can do that from the makefile
[10:51] <Shanuson> cant you sim a writing in the bootloader part? then you know if there is a protection
[10:52] <Laurenceb_> 14.86KB, so it should be ok
[10:53] <Laurenceb_> that is an idea, but I think it talks about this in the datasheet
[10:54] <Laurenceb_> ah there is a bootloader protection fusebit
[10:54] <Laurenceb_> I never set it IIRC :-/
[10:54] <rharrison> chdk is v intersting.
[10:54] <rharrison> Did you guys do the hack so you can use > 4gb
[10:55] <Laurenceb_> right, looks like I've got some ideas to go on now, I'll rip out the uC and try and upgrade it to v2.1 with the correct fusebit setting
[10:55] <Laurenceb_> brb
[10:55] <edmoore> rharrison: nope
[10:56] <rharrison> edmoore: Apparently you can partition the drive and put chdk on one partion and then store the images on the rest of the 32gb
[10:56] <edmoore> sure, I read such a thing. Would be very useful for, say, continuous vid
[10:56] <rharrison> I'm going to get that balloom bust on the 4th if it's cloudy
[10:56] <edmoore> going to need a raid array though to start dealing with all this mission data :)
[10:57] <rharrison> I'm more worried about everyone downloading it
[10:58] <rharrison> Send up the a570 with continuous vid after the first hour of accent
[10:58] <rharrison> Possibly the most boring video ever save for 5 seconfs
[10:58] <edmoore> :)
[10:59] <rharrison> 32gb card should arrive tomorrow fingers crosed
[10:59] <rharrison> Right back to the day job
[10:59] Nick change: rharrison -> rharrison_quieti
[10:59] Nick change: rharrison_quieti -> rharrison_quiet
[11:09] <Laurenceb_> ok, just firsed up another mega168 on breadboard
[11:09] <Laurenceb_> the bootloader protection is disabled by default
[11:09] <edmoore> Laurenceb_: http://www.avrfreaks.net/index.php?module=Freaks%20Devices&func=displayDev&objectid=98
[11:09] <edmoore> saw this and thought of you
[11:09] <edmoore> note the 10-bit DAC
[11:10] <edmoore> very tempting I must say. Might get a few
[11:15] <Laurenceb_> I was looking at Steve's idea of sampling the IF of a radiometrix rx
[11:16] <edmoore> uhuh
[11:16] <edmoore> for uplinks?
[11:16] <Laurenceb_> maybe
[11:16] <Laurenceb_> if you use quite a narrow filter, you can sample at much lower frequency
[11:16] <edmoore> indeed
[11:16] <Laurenceb_> e.g. as low as 50KHz
[11:17] <Laurenceb_> its quite doable
[11:17] <Laurenceb_> I was reading some papers on the same technique applied to gps
[11:18] <Laurenceb_> so if you had a filter bandpass <25Khz on the IF, then sampled at around 50KHz with a high bandwidth adc
[11:19] <edmoore> sure
[11:19] <Laurenceb_> its nice :P
[11:19] <edmoore> actually I saw a 160msps 16bit adc recently when looking at sdr
[11:19] <edmoore> quite a device!
[11:19] <Laurenceb_> neat
[11:20] <Laurenceb_> oh well I'd better get off to work
[11:20] <edmoore> i will thumb twiddle here
[11:20] <Laurenceb_> more malfunctioning microcontroller misery this evening :P
[11:20] <edmoore> :)
[11:20] <Laurenceb_> I strongly suspect the bootloader has overwritten itself
[11:20] <Laurenceb_> anyway, cya
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[11:21] <edmoore> cya
[12:25] <SpeedEvil> 8 bit 100MHz or so ADCs are quite cheap.
[12:26] <SpeedEvil> Cheaper than the software side you'd need for that side anyway.
[12:26] <edmoore> I guess you spend your money on a stable clock
[12:26] <SpeedEvil> s/software/decoder/
[12:26] <SpeedEvil> I wish I'd put a bit higher on that PCI ADC card.
[12:26] <SpeedEvil> 500MSPs on ebay.
[12:27] <edmoore> speedy!
[12:27] <edmoore> right, bbl
[12:27] Nick change: edmoore -> edmoore|away
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[13:26] <rharrison_quiet> 400 meters of braided line on the way. You will hear my beacon in london :)
[13:28] <edmoore|away> :)
[13:28] <edmoore|away> so just remind me - you're coming down to cam?
[13:28] Nick change: edmoore|away -> edmoore
[13:29] <rharrison_quiet> Yep
[13:29] <edmoore> awesome
[13:29] <rharrison_quiet> On the 4th to do bacon launch with JC
[13:29] <edmoore> can show you the den
[13:29] <rharrison_quiet> beacon
[13:29] <rharrison_quiet> :)
[13:29] <edmoore> now that's an idea
[13:29] <rharrison_quiet> Cool
[13:29] <rharrison_quiet> They say pigs may fly
[13:29] <edmoore> about 2 years ago we sent up a small bottle of port
[13:29] <rharrison_quiet> Like a ships launch
[13:30] <edmoore> (called it space port)
[13:30] <rharrison_quiet> We should get on to heinikan
[13:30] <rharrison_quiet> Reaching the parts ....
[13:30] <edmoore> and in the double blind taste, everyone thought the space port tasted better than the other stuff
[13:31] <rharrison_quiet> I'm going to travel down friday night and stay at local travellodge. Subject to weather
[13:31] <edmoore> well come for a drink
[13:31] <edmoore> we have talks in the morning
[13:31] <edmoore> infact my boss is coming to give a talk
[13:31] <edmoore> and he would definitely like to see a launch
[13:31] <edmoore> so this could work out pretty well!
[13:32] <edmoore> 'we' = all the new engineering undergrads
[13:32] <rharrison_quiet> Sat or friday
[13:32] <edmoore> which I'm helping out with
[13:32] <edmoore> sat
[13:32] <edmoore> till 11.30
[13:32] <rharrison_quiet> Cool should be fine if the weather is good
[13:32] <edmoore> but you should obv pop into town for a drink on friday :)
[13:33] <rharrison_quiet> Could say in town saves taxi back late
[13:33] <rharrison_quiet> later
[14:36] <rharrison_quiet> If anyones interested http://www.flickr.com/photos/30721501@N05/sets/72157607427579492/
[14:39] <gordonjcp> (note to self - cut grass before photographing balloon launch)
[14:43] <SpeedEvil> I like http://www.flickr.com/photos/30721501@N05/2878312071/in/set-72157607427579492/
[14:43] <SpeedEvil> with the moon and the balloon showign the same crescent.
[14:44] <SpeedEvil> gordonjcp: also - clean chimneys.
[14:44] <SpeedEvil> http://www.flickr.com/photos/30721501@N05/2878314863/in/set-72157607427579492/
[14:51] <rharrison_quiet> Thanks guys. I have just dumped the card to flickr sorry about not filtering first
[14:53] <gordonjcp> rharrison_quiet: :-p
[14:54] Action: SpeedEvil ponders ultra-light power wires.
[15:00] <gordonjcp> http://news.bbc.co.uk/1/hi/scotland/glasgow_and_west/7629489.stm
[15:03] <SpeedEvil> There is just room for an 'a' before, and a 's' after.
[15:05] <rharrison_quiet> gordonjcp: we should take out own picture
[15:05] <rharrison_quiet> our
[15:06] <gordonjcp> yeah
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[17:47] <natrium42> hi
[17:48] <natrium42> edmoore: what do you think about the icom ic-7000?
[17:48] <edmoore> link me up!
[17:48] <natrium42> http://www.icomamerica.com/en/products/7000/
[17:49] <natrium42> it seems to have very good sensitivity on HF
[17:49] <natrium42> and does the other bands too
[17:49] <natrium42> only problem is that it doesn't include antenna tuner
[17:50] <edmoore> rtty demodulator too :)
[17:50] <edmoore> nice
[17:51] <natrium42> yeah
[17:51] <natrium42> also controllable by computer
[17:51] <edmoore> well rocketboy was saying antenna tuners are easy to make and a good exercise
[17:51] <edmoore> dare I ask how much?
[17:52] <natrium42> $1400
[17:52] <natrium42> expensive for a mobile, but it's almost like a stationary
[17:52] <natrium42> people report the receive quality to be on par with icom 756 pro III
[17:53] <natrium42> which is $3000
[17:54] <natrium42> i just want to have a spectrum view :P
[17:54] <edmoore> :)
[17:55] <edmoore> 0.11µV
[17:55] <edmoore> shit
[17:55] <edmoore> that's better than the ft-790
[17:55] <edmoore> ok
[17:55] <natrium42> :)
[17:55] <edmoore> that's worth saving up for
[17:55] <edmoore> my fund starts now
[17:56] <edmoore> i will put £30/mo into my don't-touch savings account
[17:56] <edmoore> hrm, that will take 2 years
[17:56] <natrium42> haha
[17:56] <edmoore> scrap that
[17:56] <natrium42> it's so hard to decide which rig to start with, since i have never used a radio before
[17:57] <natrium42> go with a big stationary or with mobile? mobile would be easy to transport and it's good to have all bands to decide which ones to stick with
[17:57] <edmoore> i reckon mobile
[17:57] <edmoore> but I am a student
[17:57] <natrium42> me too
[17:57] <natrium42> that's my thinking also
[17:57] <edmoore> so am rarely in the same place for more than 2 months
[17:57] <natrium42> easier to transport if i move
[17:58] <edmoore> and obviously much better for chasing
[17:58] <natrium42> then again i have always the fantasy of setting up a remote transceiver on a mountain somewhere
[17:58] <natrium42> hidden in the woods
[17:58] <natrium42> and accessible over the net
[17:58] <natrium42> http://radio.tentec.com/amateur/transceivers/588
[17:59] <natrium42> ^ that one has built-in ethernet
[17:59] <natrium42> (and great reviews on eham, 5.0)
[18:00] <edmoore> gosh, that's a hell of a box
[18:00] <edmoore> wondering if we could get our decoding software on an ngw100
[18:00] <edmoore> would make a great sbc for a track-a-tron
[18:01] <natrium42> would be awesome
[18:01] <natrium42> which RF stage would you use?
[18:01] <edmoore> doesn't do the 20meg that (ic-7000) that would be required by certain lengthy operations
[18:02] <edmoore> natrium42: that's the next question
[18:02] <edmoore> wondering if very sensitive but dumb narrow band TXs can be made
[18:02] <edmoore> sorry, RX's
[18:02] <natrium42> hmm? it does 20m, doesn't it?
[18:02] <edmoore> for a reasonably permenant installation
[18:02] <edmoore> ]21-21.450
[18:03] <edmoore> 10.068-18.168
[18:03] <natrium42> 20 meters is 14MHz or so
[18:03] <edmoore> oh 20 meters!!!
[18:03] <edmoore> sorry
[18:03] <natrium42> :P
[18:03] <edmoore> thought it was 20 meg
[18:03] <edmoore> ok cool
[18:03] <natrium42> yeah, it does almost all HAM freqs
[18:03] <natrium42> besides the GHz ones
[18:04] <natrium42> the only thing is damn antenna tuner :(
[18:04] <natrium42> you want the icom one, if you want the radio to control it
[18:05] <natrium42> which you kinda need if you do remote operation
[18:05] <natrium42> so it's another $400 or so
[18:05] <edmoore> it would stay with me, probably :)
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[18:05] Action: natrium42 sets edmoore up a HF antenna
[18:05] <edmoore> though remote control to correct for rx drift might be good
[18:05] <jcoxon> evening all
[18:05] <edmoore> hi jcoxon
[18:05] <natrium42> hey james
[18:06] <edmoore> jcoxon: take a look at what natrium just introduced into my life
[18:06] <edmoore> http://www.icomamerica.com/en/products/7000/
[18:06] <natrium42> we are drooling over the icom ic-7000 transceiver :P
[18:06] <edmoore> note - higher sensitivity at 440mhz than the ft-790
[18:06] <edmoore> and... ONBOARD RTTY DECODER!!!!11111one
[18:07] <jcoxon> thats impressive
[18:07] <jcoxon> combien?
[18:07] <natrium42> and higher sensitivity for HF than the icom 756 pro III, by only 0.01 uV, though...
[18:07] <edmoore> don't ask
[18:07] <edmoore> £700
[18:07] <jcoxon> ouch
[18:07] <jcoxon> but pretty damn good
[18:08] <edmoore> BUT... £30/mo for 1 year + try and earn the other £300 in some creative way
[18:08] <natrium42> i may go to a radio store in toronto today
[18:08] <natrium42> and check it out
[18:08] <natrium42> hopefully be strong :S
[18:08] <edmoore> take the £30/mo out of drinking money
[18:08] <edmoore> haha natrium42 - how can you be strong under such an onslaught of cool?
[18:09] <jcoxon> tis way too much for me
[18:09] <natrium42> i am too impulsive
[18:09] <edmoore> actually those sensitivity values are with pre-amp on
[18:09] <natrium42> and i just paid off all my CCs
[18:10] <natrium42> edmoore: would you usually use the preamp?
[18:11] <edmoore> i would if it was there
[18:11] <natrium42> i have been looking at this table --> http://www.sherweng.com/table.html
[18:11] <natrium42> but i don't understand some of it
[18:12] <natrium42> for example, why do they put such high value on "dynamic range narrows spaced"
[18:12] <natrium42> is that selectivity?
[18:13] <natrium42> i.e. you can tune to closely spaced stations?
[18:15] <edmoore> i think it's a question for rocketboy
[18:15] <edmoore> or jcoxon
[18:15] <edmoore> seeing as he's now 50% there
[18:15] <jcoxon> pah i have no idea what that means
[18:15] Action: natrium42 pokes jcoxon
[18:15] <jcoxon> but its in dB so something to do with power?
[18:16] <jcoxon> something like hte power when using the narrow spacing (which is 2kHz)
[18:16] <jcoxon> intead of wide spaced which is 20kHz
[18:16] <natrium42> maybe it's how well it separates tuned frequency from nearby frequency
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[18:17] <natrium42> hrm
[18:18] <jcoxon> a proper ham will know
[18:18] <natrium42> is there #ham ?
[18:18] <edmoore> #hamradio
[18:18] <edmoore> it's very good
[18:18] <natrium42> merci
[18:18] <edmoore> I asked about yagis in there the other day
[18:19] <edmoore> within 10 seconds I had 40 people offering to design things for me, finding me links, generally being helpful
[18:19] <natrium42> did you initiate your conversation with CQ CQ CQ? :P
[18:19] <edmoore> that probably gets you kicked :)
[18:19] <natrium42> lol
[18:20] <natrium42> i will hang around there first
[18:21] <natrium42> edmoore: i tried to buy a mint ic-7000 on ebay yesterday
[18:21] <natrium42> got outbid in the last 10 seconds
[18:21] <edmoore> but...
[18:21] <edmoore> damn
[18:21] <natrium42> sold for $1100
[18:21] <edmoore> wow not bad
[18:21] <natrium42> yeah, but the difference to a new one is not *that* much
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[18:22] <edmoore> 35W in 70cm
[18:22] <edmoore> that should work as an uplink!!
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[18:24] <jcoxon> edmoore, if a true amateur had their way they'd go full 400W
[18:24] <jcoxon> no respect for low powers :-D
[18:24] <natrium42> lol
[18:24] <edmoore> that would burn a hole in the balloon
[18:24] <jcoxon> cutdown?
[18:24] <edmoore> :)
[18:24] <natrium42> i can only use 250W once i get basic license
[18:24] <edmoore> I do wonder actually if we could do some sort of radar
[18:24] <Hiena> Meltdown.
[18:25] <edmoore> ping off a big reflector with a yagi
[18:25] <jcoxon> natrium42, i can only use 10W on my foundation licence
[18:25] <edmoore> you'd get approximate bearing and pretty good range estimates
[18:25] <natrium42> pwned
[18:27] <edmoore> natrium42: it's got an SWR meter?
[18:27] <natrium42> yes
[18:27] <edmoore> so that's antenna tuning isn't it?
[18:28] <edmoore> forgive my ignorance if that's not the case
[18:28] <natrium42> no, that's only the meter
[18:28] <natrium42> it also has safety, i believe
[18:28] <natrium42> to turn of transmitter if antenna is mismatched
[18:28] <edmoore> ok
[18:29] <edmoore> i love the accessories for it
[18:29] <edmoore> a 1kW HF amp
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[18:29] <natrium42> hehe
[18:29] <natrium42> it would have been perfect with a built in ATU
[18:31] <natrium42> though, isn't ATU only required for transmitting?
[18:31] <natrium42> or am i misunderstanding something?
[18:32] <edmoore> i'd have thought it just as readily affects the gain for receiving
[18:32] <natrium42> ah
[18:33] <natrium42> right
[18:34] <natrium42> so the danger is only when you transmit, since you can destroy your tx if the antenna is mismatched
[18:39] <edmoore> i think so yeah - large reflected voltages
[18:39] <natrium42> edmoore: have you seen the flex-5000?
[18:39] <edmoore> jcoxon: did y'ever have a look at the ngw100?
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[18:48] <robert1971> Evening all
[18:48] <natrium42> hi robert1971
[18:48] <robert1971> hi natrium42
[18:48] <robert1971> natrium42: Had a good tethered launch yesterday
[18:49] <natrium42> cool
[18:49] <natrium42> chute test?
[18:49] <robert1971> Shoved a few pics up on flickr http://www.flickr.com/photos/30721501@N05/sets/72157607427579492/
[18:49] <robert1971> No didn't get a relase mechanism in place
[18:50] <robert1971> Will do that soon though
[18:51] <robert1971> Have ordered 400m of braided chord for a real test. Should have the cute working by then
[18:51] <edmoore> baby vid? :p
[18:51] <edmoore> I quite want to see this
[18:51] <robert1971> Ok ok I'll get it sorted :)
[18:53] <natrium42> my internets are clogged
[18:59] <natrium42> robert1971: very cool, looks like you have a full blown test program!
[19:00] <natrium42> systematic approach = greatness
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[19:02] <edmoore> I second natrium42
[19:02] <robert1971> Well it's a bit random at the moment. In fact rushed. But I have satisfied the junky in me by doing that tethered launch
[19:02] <robert1971> + good test of systems
[19:02] <robert1971> Infaltion sorted and easy on a clam day
[19:02] <robert1971> inflation
[19:02] <robert1971> clam
[19:02] <robert1971> calm
[19:03] <robert1971> 10mb file coming up of baby jack attached to balloon.
[19:04] <robert1971> http://www.robertharrison.org/images/icarus/jack.WMV
[19:05] <robert1971> This is quite low res but you get the idea. I don't think anyone on here has done this before. I wonder how much lift you get in a 3000g baloon
[19:05] <SpeedEvil> ...
[19:05] <SpeedEvil> Make sure you attach a tracker when doing that :)
[19:06] <robert1971> Too find the corpse?
[19:06] <SpeedEvil> How much string have you it on?
[19:06] <robert1971> Strong leash to ankle
[19:07] <robert1971> It would be cool to get say 80% lift by attaching balloons could do a moonwalk
[19:07] <robert1971> OT !!!
[19:07] <SpeedEvil> np: Prince - Walking on the moon.
[19:08] <robert1971> SpeedEvil: String at last w/e launch = 120m
[19:08] Action: SpeedEvil was wondering earlier about power lines to balloons.
[19:08] <SpeedEvil> http://wires.co.uk/acatalog/colour-ae_reels.html
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[19:19] <robert1971> edmoore: did you get it
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[19:20] <edmoore> oh sorry was making coffee
[19:20] <edmoore> will d/l :)
[19:25] <SpikeUK> SpeedEvil - I don't think that 0.2mm dia
[19:25] <edmoore> that's so awesome :)
[19:25] <SpikeUK> al/al wire could support it's own weight over any length
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[20:16] Nick change: Tigga____ -> Tigga
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[20:21] <Xenion> Hallo / Good evening :-)
[20:22] <Xenion> hello
[20:22] <Xenion> just a short question ...
[20:22] <Xenion> does someone now a reseller or shop where i could buy the international version of the xtend 900mhz oem radio modem ?
[20:23] <Xenion> i need 2 new ones but all shops i've found so far dont want to deliver these parts to germany, BUT these parts are allowed for delivery to germany .. so i'm a bit confused :/
[20:23] <Xenion> maybe ther's a good alternative to the xtend ?
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[21:47] <Laurenceb_> hello
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[22:42] <jcoxon> hey all
[22:45] <edmoore> ayep
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[22:53] <edmoore> RocketBoy: natrium found this'n http://www.icomamerica.com/en/products/7000/
[22:53] <edmoore> I've spent the evening figuring out schemes to save up
[22:54] <edmoore> 0.11uV is the number that excited me
[23:33] <robert1971> Having a nightmare with avr
[23:33] <robert1971> Wahts new
[23:33] <Laurenceb_> same here :P
[23:34] <robert1971> Right code works fine until I start using structures. I think some weirdness is creeping in due to the slow clock
[23:34] <Laurenceb_> actually after reading the datasheet it warns about sticking a bootloader on with no boot sector protection
[23:34] <robert1971> Who would advocate runing the bugger at 8mz rather than the internal clock.
[23:35] <Laurenceb_> "it could become corrupted and unresponsive if the uC is run from a noisy power supply" sounds like my problem
[23:35] <robert1971> Humm me thinks a fuse bit might be set allready
[23:35] <robert1971> Right Over to battery power
[23:35] <Laurenceb_> I'd certainly use a crystal
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[23:38] <edmoore> robert1971: I've never run on internal clock on anything
[23:38] <edmoore> inaccurate
[23:38] <edmoore> and sloooooow
[23:39] <edmoore> if you look at the timing errors you can get on rs232 with internal oscs, it can be a bit disconcerting
[23:39] <Laurenceb_> yeah I always use crystals
[23:39] <edmoore> though actually using a non-'accurate' freq crystal is just as unhelpful
[23:40] <robert1971> Ok cool how easy is it to shove a crystal on these things
[23:41] <robert1971> Off to farnell tomorrow
[23:42] <Laurenceb_> where is farnell?
[23:48] <robert1971> Leeds
[23:48] <robert1971> Electronic shop
[23:49] <Laurenceb_> you like in leeds?
[23:49] <robert1971> Hum can you turn off interrupts for a bit and turn them on again with avrs
[23:49] <Laurenceb_> *live
[23:49] <Laurenceb_> yeah
[23:50] <robert1971> Get gps data on rc port
[23:50] <robert1971> turn off rc intrrupt
[23:50] <robert1971> do processing
[23:50] <robert1971> turn on again
[23:50] <robert1971> rc = rx
[23:50] <robert1971> get next gps data
[23:50] <robert1971> Makes sense? Am I mad
[23:52] <Laurenceb_> maybe
[23:52] <Laurenceb_> use buffering
[23:52] <Laurenceb_> or process the gps data inside the isr
[23:53] <Laurenceb_> ah seemed to work
[23:53] <Laurenceb_> thanks
[23:53] <Laurenceb_> 0 errors :P
[23:54] <edmoore> Laurenceb_: what was your general impression on the NGW100?
[23:55] <Laurenceb_> very good
[23:55] <Laurenceb_> :D
[23:55] <Laurenceb_> but a lot of work to set up correctly
[23:56] <Laurenceb_> the default installation is not to be relied upon apparently, so you should really build your own
[23:56] <robert1971> Hey its @@uking working
[23:56] <robert1971> HHHHHHooooooooooooooorrrrrrrrrrrrrraaaaaaaaaaaaaaaaayyyyyyyyyyyy
[23:56] <Laurenceb_> :P
[23:56] <robert1971> It's only taken me 6 hours
[23:56] <robert1971> Turning the intrrupt off works a reat
[23:56] <Laurenceb_> the high supply voltage is a pain, but if you bypass a few diodes it will run off 6V
[23:56] <robert1971> treat*
[23:59] <edmoore> Ei5GTB_: blimey
[00:00] --- Tue Sep 23 2008