highaltitude.log.20080910

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[01:07] <edmoore> http://www.hasthelhcdestroyedtheearth.com/
[01:10] <natrium42> edmoore, check the source :P
[01:11] <natrium42> "<!-- the first person to ask for an RSS feed gets a free black hole in their junk
[01:11] <natrium42> ok FINE here
[01:11] <natrium42> -->"
[01:12] <edmoore> :)
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[08:42] <robert1971> natrium42: Your tracker is working brilliently
[08:43] <robert1971> BTW that passwd stuff wasn't in v1 just the parameters to pass it
[08:43] <robert1971> Oh and good morning all
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[08:49] <jcoxon> morning all
[08:51] <robert1971> Morning jc
[08:52] <jcoxon> hey robert1971
[08:52] <jcoxon> your tracker worked well
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[08:53] <robert1971> Was very pleased with the tracker
[09:19] Nick change: robert1971 -> rharrison_quiet
[09:36] <rharrison_quiet> BTW jcoxon: I shoved the beta code up on the wiki for the gps tracker. Would be interested to see if you could get it to compile on the mac and let me knoe if it works with a gps. Anytime ...
[09:36] <rharrison_quiet> Should support serial or usb gps
[09:39] <jcoxon> oh okay
[09:39] <jcoxon> don't have a gpsly
[09:39] <jcoxon> oos
[09:39] <jcoxon> don't have a gps lying around
[09:40] <jcoxon> but i'll certainly compile it
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[09:40] <edmoore> morning jcoxon
[09:40] <rharrison_quiet> edmoore: Have some work to do so quiet. I have this for you http://belkin.httpsvc.vitalstreamcdn.com/belkin_vitalstream_com/support/dl/p74559-b_f5d7230-4v7_man.pdf
[09:40] <rharrison_quiet> Check wire at lunch
[09:41] <edmoore> gimme a mins as the 12.5mb pdf takes a while through these rickety copper tubes
[09:41] <edmoore> but will check at lunch
[09:42] <jcoxon> yup it compiles
[09:44] <rharrison_quiet> Good start. The docs a bit crap but minimum is gpstrack -p <GPSPORT> eg /dev/ttyUSB0
[09:45] <rharrison_quiet> there is shell script called track which uses curl to sent the data
[09:52] <edmoore> rharrison_quiet: ok it's loaded - that's absolutely perfect - thank you!
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[11:31] <Laurenceb> hi all
[11:32] Action: Laurenceb spots a huge black thing heading his way
[11:32] <Laurenceb> could that be.... a black hole
[11:32] <Laurenceb> arrgggggggggggg
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[13:07] <rharrison_quiet> jcoxon: have you seen this? http://www.arrl.org/catalog/index.php3?category=Antennas%2C+Transmission+Lines+%26+Propagation
[13:08] <rharrison_quiet> It's seen as a bit of a bible on antennas
[13:08] <jcoxon> i haven't seen that
[13:08] <jcoxon> i'm pretty content with a 1/4 wave + ground plane for the payload antenna
[13:10] <rharrison_quiet> :)
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[17:16] <rharrison_quiet> quiet on here today
[17:16] <gordonjcp> yeah
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[17:47] <ShellEvil> yeah
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[17:50] <edmoore> yeah
[17:50] <edmoore> well, hi everyone
[17:51] <ShellEvil> Hi.
[17:51] Action: ShellEvil is having good results of foil sealer prototype
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[17:51] <edmoore> ever have days where trying to design stuff at a pc just isn't working?
[17:51] <ShellEvil> Frequently.
[17:51] <edmoore> just seem to find it all too daunting atm
[17:52] <ShellEvil> Displacement activity++
[17:52] <ShellEvil> Work?
[17:52] <edmoore> too many daughter boards and mazzanine boards on badger 2 for my brain to deal with
[17:52] <edmoore> no, finished work
[17:52] <ShellEvil> ah
[17:52] <edmoore> I'm on holiday now
[17:52] <edmoore> I might start on manufacturing the ringslot. Sewing machine and shed rather than pc stuff.
[17:53] <ShellEvil> ringslot?
[17:53] <edmoore> parachute - lots of concentric bands of fabric
[17:53] <ShellEvil> ah
[17:53] <edmoore> well, 5 for this design
[17:54] <edmoore> and the gaps make up about 20% by area
[17:54] <ShellEvil> Like (((o))) sort of?
[17:54] <ShellEvil> with the gaps distributed?
[17:54] <edmoore> yep
[17:54] <ShellEvil> I need to get a big table cleared for a test balloon tonight.
[17:54] <edmoore> exciting!
[17:55] <edmoore> will be great if it works - could take some pretty serious pressures
[17:55] <edmoore> you'd be recreating echo
[17:55] <ShellEvil> Well...
[17:55] <ShellEvil> Simple shapes - cylinders - are damn easy.
[17:55] <edmoore> bouncing some radio signals off it
[17:55] <edmoore> true true, start with them first
[17:55] <ShellEvil> But once you start wanting to pressurise it, it gets a bit messy.
[17:55] <edmoore> rharrison_quiet: are you still quiet?
[17:56] <ShellEvil> I was considering as a first cut a simple cone + cone.
[17:56] <edmoore> we are doing our ZPs a bit like that
[17:56] <ShellEvil> Maybe cone+cylinder+cone
[17:56] <ShellEvil> As it makes the angles less sharp.
[17:57] <ShellEvil> The gluejoints (at 20c) are _very_ strong. With only a 0.2mm bit of glue flattened under heat.
[17:58] <edmoore> do you know how they'd hold up at -60?
[17:59] <ShellEvil> The fact that the glue is 10um thick and 5mm thick or so should greatly help with that.
[17:59] <ShellEvil> The stress on the actual joints is almost zero.
[18:00] <ShellEvil> I'm going to do some tests tonight in the freezer.
[18:00] <ShellEvil> Folding is of course a much worse problem than with plastics.
[18:01] <edmoore> it would be awesome to fly one of them
[18:01] <edmoore> would look pretty spectacular
[18:01] <edmoore> shiny side out
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[18:05] <ShellEvil> Yep.
[18:06] <ShellEvil> Especially if you could get the assembly decent enough to take superpressure.
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[18:08] <ShellEvil> I came up with a _really_ neat machine to do it - but it's a bit annoying to make.
[18:09] <edmoore> that seems to be a universal constant with balloon making!
[18:09] <rharrison_quiet> edmoore: The postman can't take big parcel's from work so will post tomorrow at post office. Chucked an 8 port hub in there too.
[18:09] <edmoore> :) thanks!
[18:09] <edmoore> blimey it'll be like christmas
[18:09] <ShellEvil> Basically hold the edges of the balloon that you're making, and inflate it, while running a reel of foil round the outside and sealing it on.
[18:10] <ShellEvil> So you end up with an inflated sphere.
[18:10] Nick change: rharrison_quiet -> rharrison
[18:10] <edmoore> that's very cunning
[18:10] <ShellEvil> You'd have to be able to cut the foil and join it as it went on.
[18:10] <ShellEvil> as you can't quite make a balloon out of a straight run of foil.
[18:11] <ShellEvil> Or at least crease it in the right way automatically.
[18:11] <rharrison> What is the problem with the foil isn't it wide enough?
[18:11] <ShellEvil> Essentially no balloon material is wide enough.
[18:12] <ShellEvil> You have to join them all to get to the 10-50m or so circumferences needed.
[18:12] <rharrison> I suppose a long cylinder is out of the question
[18:12] <ShellEvil> rharrison: not totally.
[18:12] <edmoore> phatmonkey: is the wiki backed up?
[18:12] <phatmonkey> edmoore: nightly offsite, yeah
[18:12] <ShellEvil> rharrison: but a 200m^2 cylinder of 1m diameter (say) has a _much_ lower volume than a 200m area sphere.
[18:12] <edmoore> phatmonkey: grand. Might stick a lot of useful badger stuff there.
[18:13] <edmoore> just checking it shouldn't go anywhere :)
[18:13] <ShellEvil> rharrison: so it has lower lift, but the same weight.
[18:13] <ShellEvil> rharrison: which means lower altitude.
[18:13] <edmoore> though you could make a really aerodyanmic one
[18:13] <rharrison> Yep, true but offset againt the hassle of constructing it
[18:13] Action: ShellEvil ponders his old airfish idea.
[18:14] <ShellEvil> (make a beeeeg dolphin, with a reynolds number in the right range)
[18:16] <rharrison> I'v found a nice antenna book http://www.arrl.org/catalog/9876/
[18:17] <edmoore> rharrison: looks great -a good site, that.
[18:17] <edmoore> We've been looking at 'big wheel' antennas for balloons.
[18:18] <gordonjcp> edmoore: / phatmonkey - if you need some additional storage I can bung an account for it on my box in finland
[18:18] <phatmonkey> gordonjcp: oh cool, thanks
[18:18] <phatmonkey> I think we're sorted for the moment
[18:19] <rharrison> Global backup!
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[18:20] <gordonjcp> I'm planning on restarting my jabber server, if that's any use to anyone
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[18:30] <ShellEvil> Hmm.
[18:30] <ShellEvil> I suppose for testing, a hot-air balloon would work fine.
[18:31] <ShellEvil> A 500W halogen bulb in the middle
[18:33] <edmoore> would reflect the radiotion about the inside
[18:33] <edmoore> all the while being absorbed by the air
[18:33] <edmoore> good plan
[18:34] <ShellEvil> http://www.youtube.com/watch?v=kmqiwEQAl3Q&feature=related
[18:34] <ShellEvil> (unrelated)
[18:38] <ShellEvil> http://www.youtube.com/watch?v=6sb0_3MlNxc&feature=related fun.
[18:46] <rharrison> You can buy those from the kids hawkins catlog. I got 1 for chistmas
[18:46] <edmoore> I have a tissue one I have never flown yet
[18:46] <rharrison> Mine was like an ovesized plastic bag
[18:47] <rharrison> Thinking beacon!
[18:47] <Hiena> rharrison, thrashbag?
[18:47] <gordonjcp> thinking bacon
[18:48] <rharrison> I like the idea of a thrashbag
[18:48] <Hiena> I used it.
[18:48] <rharrison> http://www.hawkin.com/find/keyword-is-solar/product-is-07246
[18:49] <Hiena> The last was about three qubic meter. Burned well, when the heater went off.
[18:53] <rharrison> I'm off home tracker will be activated. www.robertharrison.org/tracker
[18:53] <rharrison> ttfn
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[18:56] <gordonjcp> funny, rharrison is at 23000m altitude already
[18:57] <Hiena> Yeah, guess, he got a nice boosters.
[18:59] <gordonjcp> ah, chase1, that'll be him
[18:59] <Hiena> Hmmm... Is this tracker open-source?
[19:01] <edmoore> Hiena: yes. http://wiki.ukhas.org.uk/projects:tracker?s=tracker
[19:05] <Hiena> Nice...
[19:20] <gordonjcp> haha, 65mph by GPS
[19:21] <gordonjcp> he's behaving himself...
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[20:28] <robert1971> Evening all
[20:29] <robert1971> Tracker worked well again. I think that is sorted now. It will probably fail when I need it most
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[20:37] <rharrison1971> High RocketBoyv1 any news on those balloons sir?
[20:38] <RocketBoyv1> yep - I emailed you eariler - sorry i have been busy yesterday
[20:39] <RocketBoyv1> basically 1 have 1 x 1200g left - so thats yours plus a 1500
[20:39] <rharrison1971> Perfect. I read email now
[20:39] <RocketBoyv1> I checked with kaymont to see if i could get some more 1200s - but they are out of stock at the mo
[20:41] <RocketBoyv1> Actually I also had an oreder in for 4 x 1200s from someone in Bulgaria - so the volumes are ramping up
[20:43] <rharrison1971> RocketBoyv1: I have paid + 3 quid beer money for your service.
[20:44] <RocketBoyv1> Oh - ta -it'll be in the post tomorrow
[20:45] <RocketBoyv1> BTW - I asked Kaymont about getting a discount & becomming a stocking distributer for the UK
[20:46] <RocketBoyv1> They said that you had alreday asked them to become a distributer?
[20:46] <rharrison1971> Great the UK needs the service... UKHAS could give a steady business at this rate.
[20:46] <rharrison1971> That was before I found out you did the ordering
[20:47] <rharrison1971> In fact that was how I found out that you did the ordering by chatting to ed.
[20:47] <RocketBoyv1> Ah - OK np - i didn't want to step on any toes
[20:48] <rharrison1971> No prob with me. Like you I thought I could order 20 odd balloons in a distribute as a service. And like you I don't want to step on any toes so I'm easy either way
[20:48] <rharrison1971> a = and
[20:50] <RocketBoyv1> yeah business is variable - we had gaps of 2 to 3 months between launches earlier in the year
[20:50] <rharrison1971> Needless to say no response from Kaymont
[20:51] <RocketBoyv1> I gess they may have been waiting to talk to me
[20:51] <RocketBoyv1> gess = guess
[20:51] <rharrison1971> It's more of a holding service for UKHAS as I guess quite a few of these guys are students and not in a good position to bulk buy
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[20:52] <rharrison1971> Do the rocket people play with sounding balloons or are you guys bent on getting metal up there?
[20:53] <RocketBoyv1> The bigger launches use sounding balloons to measure windspeed for dispersal patterns etc.
[20:54] <jiffe98> for receiving, do you guys normally use a hardware TNC or software?
[20:54] <RocketBoyv1> but not un the UK - we don't normally go high enough to warrent it
[20:54] <RocketBoyv1> jiffe98 - mostly software
[20:54] <RocketBoyv1> i used a TNC one
[20:54] <jiffe98> what programs?
[20:54] <RocketBoyv1> once
[20:54] <RocketBoyv1> TrueTTy mainly
[20:55] <RocketBoyv1> or cocamodem on mac
[20:55] <jiffe98> that seems to work pretty good?
[20:55] <RocketBoyv1> yeah - good as a TNC
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[20:55] <jiffe98> I tried usign mixw, it works, but its an all or nothing program it seems, either it receives all the data or I get nothing, no garbled data or anything which would be preferable over nothing
[20:56] <rharrison1971> RocketBoyv1 Cool, I'll leave the balloons to you if you happy to keep the service going
[20:56] <RocketBoyv1> rharrison - tnx - np
[20:57] <RocketBoyv1> jiffe98 - anre you using packet?
[20:57] <rharrison1971> BTW is there a website. I heard mention of one but no URL was forth coming
[20:57] <jiffe98> I am
[20:57] <RocketBoyv1> there is a website - but its well out of date at the mo - I'll update it one day
[20:58] <RocketBoyv1> better not give the URL out otherwise people will be baning in orders for balloons that arnt there
[20:58] <rharrison1971> :) Tops, let me know when you get some more in I'm probably up for at least 4 more in the next six months
[20:59] <RocketBoyv1> jiffe98; that it then packet has error cheking
[20:59] <RocketBoyv1> it has a CRC - and if that isn't correct the packet is discarded
[20:59] <rharrison1971> Perhaps one 3000g when systems are all tested and functional
[20:59] <RocketBoyv1> sometines you can turn the CRC off
[21:00] <jiffe98> ic
[21:01] <RocketBoyv1> rharrison1971: if you still want a 3000 let me know at the end of october 9thats the next time they are in)
[21:01] <rharrison1971> I'll pre pay for one in october if you're going to put an order in
[21:02] <RocketBoyv1> OK ta
[21:04] <RocketBoyv1> jiffe98: If you are using it with FM then you will find that the threshold effect means that everything works fine up to a certain distance (30 - 40Km with 10mW on 434Mhz) then it suddenly gets worse and thats it (becuse of the CRC)
[21:10] <rharrison1971> edmoore: You there for 3 sec on ground planes? Do they need to be the same length as the active bit?
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[21:22] <RocketBoyv1> rharrison: a bit longer tha 1/4 wave
[21:22] <RocketBoyv1> than
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[21:30] <RocketBoyv1> rharrison: the leeds address right? not the PP addy?
[21:30] <jiffe98> its packet over afsk
[21:32] <RocketBoyv1> yeah - that will be the reason FM: whenyou get beyond the FM quietnibg threshold then noise will corrupt the packets and the CRC will stop the packets
[21:33] <RocketBoyv1> turning the CRC off will get you some more distance
[21:33] <RocketBoyv1> but not a vast amount as FM degrades rapidly beyond a certain point
[21:34] <jiffe98> would you recommend not using fm?
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[21:36] <rharrison1971> evening natrium42: Just to report your tracker worked beatifully again this evening.
[21:36] <RocketBoyv1> basically yes - since we cant run more than 10mw (Ham radio is barred) then if you want more than 30 - 40Km its somthing like FSK RTTY or FSK packet (HF packet)
[21:37] <natrium42> hi rharrison1971
[21:37] <natrium42> great to hear
[21:37] <rharrison1971> RocketBoyv1: Ignore the PP address the belgrave hall one is work.
[21:38] <RocketBoyv1> The only Licence exempt modules that are allowed in the UK for airborne operation are 434MHz 10Mw FM
[21:38] <RocketBoyv1> rharrison: Ok np (alreday marked that one up)
[21:39] <RocketBoyv1> So anything you cam make out of those modules are OK
[21:39] <rharrison1971> Phew! Glad jcoxon and edmoore pointed me to 434.650
[21:41] <RocketBoyv1> rharrison: yeah 434.650 or 434.075MHz are just fine - but anywher in between is OK too (if you can get a approporite module)
[21:41] <rharrison1971> Can I use a standard brought plastic whip for the active and then attach 4 wires to the base to the side of the sma connector to make the groundplane. This will give me a stable & flexible active with a simple groud plane
[21:50] <RocketBoyv1> yeah - sounds fine
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[21:55] <jiffe98> well fsk packet is what I am using, my transmitter is putting out 300mw
[21:56] <jiffe98> at 144.39
[21:57] <jiffe98> we did a line of sight test last night (best we could at least) and got about 20km before it wasn't decoding the data, although I could still see the transmission in the spectrum
[21:57] <edmoore> what baud rate?
[21:57] <jiffe98> 1200
[21:57] <edmoore> only 20km?
[21:58] <edmoore> we've got a 300 baud 10mW 434 radio to go 100s of kms. That sounds odd.
[21:58] <edmoore> FSK
[21:58] <jiffe98> hmm
[21:58] <edmoore> could be receiver sensitivity. They seem very much not created equal.
[21:58] <edmoore> and this was with a yagi
[21:59] <jiffe98> we had a ground plane on the transmitter and square loop on the receiver
[21:59] <gordonjcp> edmoore: aha, not on the ground though
[21:59] <rharrison1971> RocketBoyv1: edmoore: I'm thinking something like this with wires and whip connected to sma connector (Not shown) http://www.robertharrison.org/images/icarus/whip&gndplane.jpg
[21:59] <edmoore> RocketBoyv1 could postulate an answer with far more authority than i ever could.
[22:00] <edmoore> gordonjcp: oh yes, good point
[22:00] Action: gordonjcp lightly tosses in phrases like "fresnel zone" and "multipath reflection" like he knows what he's talking about
[22:00] <edmoore> rharrison1971: you could save yourself the weight and dough by replacing the whip with another piece of wire.
[22:00] <edmoore> but conceptually that seems absolutely fine to me - RocketBoyv1?
[22:01] <rharrison1971> 4 quid but weight sounds good
[22:06] <edmoore> h'ok, enforced early night. tomorrow is a busy day. g'night all
[22:06] <rharrison1971> nights
[22:07] <natrium42> nite edmoore
[22:09] <rharrison1971> RocketBoyv1: One last question does insulation make any difference to the antenna
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[22:18] <gordonjcp> rharrison1971: a wee bit, but don't worry too much about it
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[22:23] <RocketBoyv1> rharison; yeah the whip looks good
[22:26] <RocketBoyv1> like ed says a 1/4wave (actually about 16.3cm for thinish wire by my calculations) would be just as good if not better - and will be lighter
[22:27] <RocketBoyv1> the plastic will make little odds - like gordomcp says.
[22:29] <gordonjcp> antennas are fairly hard to get wrong
[22:29] Nick change: phatmonke -> phatmonkey
[22:29] <gordonjcp> I've got them wrong in the past, but only by trying quite hard
[22:29] <gordonjcp> and letting things get overcomplicated
[22:36] <jiffe98> alright, well I can try dropping the transmitter down to 300bps and see if that helps
[22:38] <RocketBoyv1> yeah - people go mad about certain antennas - but in practice you can have gain and directivity - or no directivity and no gain (as long as its a good match)
[22:39] <RocketBoyv1> jiffe98 - have you got a diagram of your radio set up?
[22:41] <jiffe98> I just have a microtrak 300 for the transmitter connected to a ground loop antenna, and on the receiving side I have a yaesu vx150 attached to a square loop antenna which we had mounted an raised last night connected to my sound card.
[22:41] <Laurenceb> hello
[22:41] Action: Laurenceb is back
[22:41] <natrium42> in black
[22:42] <natrium42> :D
[22:42] <Laurenceb> actually I have black flue sealant all over my fingers
[22:42] <Laurenceb> very annoying to get off
[22:42] <natrium42> haha
[22:42] <Laurenceb> finished my bathroom today :D
[22:42] <natrium42> not as annoying as superglue?
[22:43] <Laurenceb> more so
[22:43] <natrium42> oh, so you cannot just scrape it off with a scalpel?
[22:43] <Laurenceb> I thought it would be like ordinary silicone.... I was wrong
[22:43] <Laurenceb> ha
[22:44] <RocketBoyv1> Ah ok thats 300mw on 144MHz - AFSK packet
[22:44] <Laurenceb> hi RocketBoyv1
[22:45] <jiffe98> it is
[22:46] <Laurenceb> 'just' doors and decorating to finish - but that will probably expant to fill the time avaliable
[22:46] <RocketBoyv1> jiffe98: my rough calc is that should be good for about 150 - 200Km with a fair radio setup
[22:47] <jiffe98> apparently we have a much less than fair radio setup :)
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[22:47] <RocketBoyv1> Ah - whats the reciever?
[22:47] <jiffe98> yaesu vx150
[22:47] <natrium42> Laurenceb, http://www.shacknews.com/onearticle.x/54652
[22:47] <natrium42> uh oh
[22:50] <RocketBoyv1> jiffe98: thats 0.16uV for 12db SINAD - thats quite respectable - somthing else is wrong IMO
[22:51] <RocketBoyv1> ha ha - actually I'm really quite annoyed - i expeted to be inside a black hole by now
[22:52] <jiffe98> yeah, might be the antennas, the ground plane was giving us an SWR of about 2 when we last tested it, we had to flatten the plane to get that, we were testing this indoors too. The square loop was giving us an swr of 35, but it had a bad connector on it. We fixed that connector before the test last night but never checked what the swr was, might do that tonight
[22:53] <RocketBoyv1> 35 - ugggggggggg
[22:54] <jiffe98> yeah I know :)
[22:54] <RocketBoyv1> - so the loop is on the receiver end ? how may elements?
[22:55] <jiffe98> we have 2 of them but didn't have the cable to connect them so we were running 1 at a time
[22:56] <RocketBoyv1> sounds complicated - get a 3 ele yagi
[22:57] <RocketBoyv1> (or 4 - or as many as you can cram into the car)
[22:57] <natrium42> hmm
[22:57] <natrium42> you could use a train of multiple cars spaced properly :P
[22:58] <RocketBoyv1> HB9CV antenna is an option - there are some you acn make with a tape measure - they roll up for transport
[22:59] <RocketBoyv1> acn = can
[22:59] <jiffe98> we'll be using a truck for the chase car so we have plenty of room
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[23:00] <jiffe98> something like this? http://cgi.ebay.com/2-Meter-VHF-144-148-5-Element-Yagi-Beam-Antenna_W0QQitemZ230288221329QQcmdZViewItem
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[23:02] <rharrison1971> Does the active antenna need to perfectly straight. Ie no slight bend in the wire?
[23:02] <RocketBoyv1> yeah - but at 5ft+ a bit unweildy - given you are probaly going to use it handheld
[23:03] <jiffe98> well we can mount this to the back of the truck and just a feedline inside
[23:04] <jiffe98> although that won't allow us to change its direction as necessary
[23:04] <RocketBoyv1> yeah - need somthing to be able to angle it up though
[23:05] <RocketBoyv1> there is somthing to be said for the direct response you get by waving it around by hand
[23:05] <RocketBoyv1> a much better feel for direction
[23:05] <RocketBoyv1> and optimising the signal strength
[23:06] <RocketBoyv1> for hand held - extend the boom from behaind the reflector (the ongest element)
[23:06] <RocketBoyv1> and hold the boom extension
[23:07] <RocketBoyv1> but I think you will find 5 ele too much to handle
[23:07] <jiffe98> ic
[23:08] <RocketBoyv1> we use a small tripod with counterpoise - but thats fine for a smallish 434MHz antenna -
[23:08] <RocketBoyv1> not for a 5 ele 144MHz
[23:11] <Laurenceb> http://www.hasthelhcdestroyedtheearth.com/
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[23:32] <Laurenceb> I've just posted some rewritten kalman filter code on the wiki - uses less ram
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[23:50] <Laurenceb> RocketBoyv1: have you tried the ssb SSTV yet?
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[00:00] --- Thu Sep 11 2008