highaltitude.log.20110320

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[00:37] <Lunar_Lander> WB8ELK are you there for a question?
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[01:01] <MrCraig> night folks \\//_
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[01:21] <Dan-K2VOL> anyone around?
[01:22] <Lunar_Lander> yeah
[01:38] <Lunar_Lander> Dan-K2VOL ?
[01:38] <Dan-K2VOL> ah
[01:38] <Dan-K2VOL> having major rfi problem from hf xmitter
[01:38] <Lunar_Lander> ah ok
[01:39] <Lunar_Lander> but one question to the temp sensor if that is OK?
[01:39] <Dan-K2VOL> sure
[01:39] <Lunar_Lander> I thought you wanted to show me a picture or schematic
[01:39] <Lunar_Lander> a few hours ago
[01:39] <Dan-K2VOL> just a sec
[01:40] <Dan-K2VOL> http://wiki.whitestarballoon.com/doku.php?id=hardware:payload1box
[01:41] <Lunar_Lander> ah thanks!
[01:41] <Lunar_Lander> my suggestion had been
[01:41] <Lunar_Lander> (23:43:12)<Lunar_Lander>Dan-K2VOL I got a suggestion
[01:41] <Lunar_Lander> (23:43:30)<Lunar_Lander>point the temp sensor a few degrees off the vertical
[01:41] <Lunar_Lander> (23:43:45)<Lunar_Lander>so that it doesn'T face the bottle
[01:41] <Lunar_Lander> what do you think?
[01:42] <imrcly> yeah
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[01:47] <imrcly> yeah
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[03:37] <tyrosine> Greetings all! I'm preparing to do a launch with my university soon...
[03:39] <tyrosine> I built a 10m (28mhz) telemetry transmitter tonight, but I'm not done with the final amplifier
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[04:33] <Darkside> cool
[04:33] <Darkside> wha amp are you using?
[04:34] <Darkside> oh he's gone
[04:34] <Zuph> heh
[04:34] <Zuph> too slow
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[06:54] <natrium42> o/
[06:55] <Dan-K2VOL> urgh
[06:56] <Dan-K2VOL> natrium42 this HF xmitter is freaking our flight computer out now that we've hooked it up to the antenna
[06:56] <natrium42> eek
[06:57] <natrium42> do they share power/ground?
[06:57] <Dan-K2VOL> ground yes
[06:57] <Dan-K2VOL> the cpu runs through a pololu 3.3v switching reg from the batt pack, and the HF runs of fthe raw batt pack
[06:57] <Dan-K2VOL> lol no worries
[06:57] <natrium42> :D
[06:57] <Dan-K2VOL> I'm on the phone with him
[06:58] <Dan-K2VOL> just lamenting
[06:58] <natrium42> aaah
[06:58] <natrium42> rf interference is scary
[06:58] <Dan-K2VOL> and have Carl Lyster conferenced in
[06:58] <Dan-K2VOL> I hate RF
[06:58] <Zuph> Digital Good, Analog Baaaad.
[06:59] <Zuph> Or, http://www.theamphour.com/wp-content/uploads/2011/03/bob_widlar_digital.jpg
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[08:15] <jcoxon> you called natrium42
[08:20] <natrium42> nonono
[08:20] <natrium42> 03:02 < natrium42> !summon wb8elk
[08:20] <natrium42> :D
[08:20] <jcoxon> oh right
[08:20] <jcoxon> by default it summons me
[08:20] <jcoxon> if they aren't in zeusbot's database
[08:21] <natrium42> sowwy
[08:21] <jcoxon> no worries
[08:22] <jcoxon> am intergrating spot today
[08:22] <jcoxon> will have a fully functioning payload by the end
[08:22] <natrium42> cool
[08:23] <Dan-K2VOL> haha
[08:23] <jcoxon> morning Dan-K2VOL
[08:24] <jcoxon> anyone want to be added to the summon database?
[08:26] <Dan-K2VOL> I"d like to be added to the sleep database please
[08:27] <jcoxon> !sleep Dan-K2VOL
[08:27] <imrcly> yeah!
[08:28] <imrcly> caution
[08:28] <imrcly> computer vocal abuse
[08:29] <Dan-K2VOL> jcoxon, serious HF problem here
[08:29] <Dan-K2VOL> been up all night screwing with it
[08:29] <jcoxon> i read in the logs
[08:30] <Dan-K2VOL> we finally hooked up the HF antenna to the payload outdoors
[08:30] <Dan-K2VOL> ah
[08:30] <jcoxon> whats the diagnosis?
[08:30] <jcoxon> dirty tx'er?
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[08:31] <Dan-K2VOL> eh
[08:31] <Dan-K2VOL> and brad what are you doing up at this hour
[08:32] <jcoxon> Dan-K2VOL, you should just switch to UTC as your timezone now
[08:32] <Dan-K2VOL> not sure if it's the TX or lack of shielding on the fcpu
[08:32] <jcoxon> then you've got a whole day ahead of you
[08:32] <Dan-K2VOL> lol yeah!
[08:32] <jcoxon> cause its a bright sunny day here
[08:32] <Dan-K2VOL> nice
[08:33] <jcoxon> Dan-K2VOL, wrap everything up to shield it all
[08:34] <imrcly> that was my advice
[08:35] <Dan-K2VOL> what do you use for that
[08:35] <Dan-K2VOL> unfortunately everything is pretty glued in to the box already
[08:35] <jcoxon> space blanket?
[08:35] <Dan-K2VOL> do you ground that thing?
[08:37] <jcoxon> i don't think so
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[08:38] <jcoxon> is the HF radio mounted externally or in the box?
[08:38] <imrcly> exernally
[08:39] <imrcly> but it is on the side of the box
[08:39] <jcoxon> so you could put shielding in between it and the rest of the box
[08:39] <imrcly> we only are seeing problem when we have the full antenna not the dummy load
[08:39] <jcoxon> oh
[08:40] <jcoxon> and its hard to tune the antenna as you can't put it in a vertical configuration
[08:40] <jcoxon> i see
[08:40] <Dan-K2VOL> we're going to try reducing power
[08:40] <Dan-K2VOL> the swr on the antenna strung out 4 ft above ground is 1.5:1
[08:50] <jcoxon> Dan-K2VOL, shout if you need me to do anything - appreciate the stresses (just !summon jcoxon will do :-p )
[08:54] <Dan-K2VOL> thanks jcoxon
[08:55] <Dan-K2VOL> goin to bed
[08:55] <jcoxon> night!
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[08:58] <griffonbot> @LVL1WhiteStar: RFI sucks. Finally tried HF Transmtr on antenna. makes flight computer reset evry time it sends. Grr. Very little time to fix. #arhab [http://twitter.com/LVL1WhiteStar/status/49394328153497600]
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[09:10] <jcoxon> hooray atlas is simulatinously txing 434 and SPoT
[09:11] <jcoxon> the only issue being that longitude is being in correctly converted
[09:11] <jcoxon> :-p
[09:11] <jcoxon> the latitude is correct!
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[09:50] <mattltm> Hi all :)
[09:53] <MrCraig> Hi mattltm
[09:53] <MrCraig> sorry I didn't see you - wiring things.
[09:53] <mattltm> No probs :)
[09:53] <mattltm> Hows things?
[09:55] <MrCraig> not bad :-) If this potential divider works with the radio, I'll be constructing the hardware today because the software is working sufficiently that I can be confident of the pin outs and transfer to pcb
[09:55] <mattltm> Cool. A day of building.
[09:55] <MrCraig> yeah, desperately need one :)
[09:56] Action: jcoxon was going to make a trip to maplins but ordered from rapidonline instead
[09:57] <MrCraig> is maplins open sunday?
[09:57] <jcoxon> yeah
[09:57] <MrCraig> reminds me that I need to do a parts list for one co-worker, and buy a transformer and strip of header pins for another. Because of this project they all seem to think I know what I'm doing with "lectrix" now
[10:12] <mattltm> Not that Maplin will have what you need though!
[10:12] <jcoxon> indeed
[10:12] <jcoxon> hence why i didn't bother
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[10:21] <SamSilver> Whitestar is at ?? hours and counting??
[10:21] <SamSilver> I am out of the loop at the mo
[10:21] <jcoxon> well in theory about 36
[10:21] <jcoxon> but
[10:22] <SamSilver> But ??
[10:22] <jcoxon> they are having RFI issues - the HF radio on its antenna resets the flight computer
[10:22] <SamSilver> I see that
[10:22] <jcoxon> so that could delay matters
[10:22] <SamSilver> tin-foil or the old fassioned way
[10:22] <SamSilver> distance
[10:22] <Laurenceb> how deah
[10:23] Action: Laurenceb thought that may happen
[10:23] <Laurenceb> massive HF ant next to a flgiht computer is not good
[10:23] <jcoxon> they'll get it sorted i'm sure
[10:23] <SamSilver> james did you look at my dumping system based on that water wheel design?
[10:23] <jcoxon> SamSilver, i haven't really had time
[10:23] <jcoxon> have been working on SPoT
[10:24] <jcoxon> have now got it all intergrated so my flight computer is txing on 434 and SPoT currently
[10:25] <SamSilver> yes I don't want to talk about your Spot as it makes me green
[10:25] <SamSilver> :p
[10:25] <SpeedEvil> How orientation sensitive?
[10:25] <SpeedEvil> Does it wor upside down?
[10:25] <jcoxon> SpeedEvil, no
[10:25] <jcoxon> that said the occasional message is getting through from my window which has very poor sky view
[10:26] <jcoxon> i made a mistake in my conversion code so it thinks I'm here:
[10:26] <jcoxon> http://maps.google.com/maps?f=q&hl=en&geocode=&q=50.8166,-42.62347&ll=50.8166,-42.62347&ie=UTF8&z=12&om=1
[10:26] <SamSilver> I check the SPOT sute daily to see if I am covered yet (I am not in the sat caverage area)
[10:27] <jcoxon> SamSilver, they need a ground station in South Africa
[10:27] <jcoxon> the sats are just 'bent pipes'
[10:28] <SamSilver> Jcoxon if you where there you would be damp to say the least
[10:28] <jcoxon> hehe
[10:29] <jcoxon> latitude is correct
[10:29] <jcoxon> just i messed up the longitude conversion
[10:29] <jcoxon> just working out exactly how
[10:29] <SamSilver> Speed has some damp proofing SpanKing it is I think
[10:30] <SpeedEvil> Naah - masses and masses of tarp though.
[10:30] <SpeedEvil> SamSilver: Email them and tell them they can put a groundstation on your house free.
[10:31] <SamSilver> decimal points in the wrong place make a mess of gps readings
[10:31] <SamSilver> how come a ground station?
[10:31] <SamSilver> I thought it was that there was no sta coverage?
[10:32] <SamSilver> sat
[10:32] <SpeedEvil> The satellites go over.
[10:32] <jcoxon> so for a tx the sat needs to be in view of both the SPoT and the ground station
[10:32] <SamSilver> or is it decimal to 60?
[10:32] <jcoxon> hence on the coverage is always around the ground stations
[10:34] <SamSilver> Ah ... the sms - cell phone link - part is not avaiable in South Africa
[10:34] <SamSilver> To me it looked like the sats where geostationary
[10:35] <SpeedEvil> No - the satellite sends a signal to the ground that it's picked up a transmission. It can't do this if there is no station on the ground.
[10:35] <jcoxon> oh actually its not just the lack of a ground station
[10:35] <jcoxon> their orbits don't cover it either
[10:35] <jcoxon> according to wikipedia
[10:36] <SamSilver> thanx for the enlightenment
[10:36] <SamSilver> Oh sh!T
[10:36] <SpeedEvil> oop
[10:37] <SamSilver> so I need a sat and a dish on my thatch roof :p
[10:37] <jcoxon> SamSilver, actually i reckon it is just hte lack of ground station
[10:37] <jcoxon> considering australia and south america are covered
[10:37] <SamSilver> well it won't be problem once my ZP gets to the northen hemi lol
[10:39] <MrCraig> :-( my wave is not square *sigh*
[10:40] <SamSilver> remove the smoothing caps Mr Craig
[10:40] <jcoxon> SamSilver, you thinking a ZP balloon?
[10:41] <SamSilver> Jcoxon I was untill a brainfart hit me last light while looking at the full moon
[10:42] <SamSilver> and so I am going to have a bash at making my own superpreasure
[10:42] <MrCraig> SamSilver: reminds me of that story, "Gentlemen, thaw your chickens"
[10:42] <SamSilver> YES the cannon and the jet
[10:42] <jcoxon> SamSilver, oh wow
[10:42] <SamSilver> windscreen cockpit
[10:42] <MrCraig> lol yes
[10:43] <SamSilver> can I ask a question?
[10:43] <jcoxon> of course
[10:43] <jcoxon> (the one rule of IRC is never ask if you can ask a question)
[10:43] <SamSilver> is it acceptable to call someone by their real name instead of their name here
[10:44] <SamSilver> I am David and you are James
[10:44] <jcoxon> sure
[10:44] <SamSilver> k
[10:44] <jcoxon> but if you mention their nick it alerts that there is a message
[10:44] <SamSilver> thanx
[10:44] <jcoxon> also many irc clients auto complete nicks
[10:44] <SamSilver> brb in three mins
[10:44] <SamSilver> I did not know about the alerts
[10:45] <MrCraig> oh and giving a time on your brb's is required *kidding
[10:45] <jcoxon> so lots of people are idling here - they'll only respond when someone says something and their client jumps up and down a bit
[10:47] <SamSilver> ok ... so look at these two images
[10:47] <SamSilver> http://www.flightglobal.com/airspace/media/apgphoto/cameron-gb-1000-gas-balloon-76276.aspx
[10:47] <SamSilver> http://www.google.co.za/imgres?imgurl=http://www.adventureballoons.co.uk/images/ch/ss4.jpg&imgrefurl=http://www.adventureballoons.co.uk/history.html&usg=__BpUv8W53uH6N_G0xo_vIRZ_WAU0=&h=305&w=200&sz=76&hl=en&start=0&zoom=1&tbnid=rpKKX-w1gcdIPM:&tbnh=142&tbnw=93&ei=zdqFTbTGFJO1hAe5jOGtBA&prev=/images%3Fq%3Dgas%2Bballoon%26hl%3Den%26safe%3Doff%26biw%3D1276%26bih%3D575%26gbv%3D2%26tbs%3Disch:1&itbs=1&iact=rc&dur=765&oei=zdqFTbT
[10:48] <SamSilver> and then imagine that you made the mesh / cloth out of parachute material and that it fully coverd a latex balloon
[10:50] <SamSilver> say a 3000g latex > you made the 12 grore parra material sphere only 10m in circum
[10:50] <SpeedEvil> you get a superpressure balloon, yes.
[10:50] <SamSilver> then the latex would only be able to expand to 10m in dia
[10:51] <SamSilver> is that a trait the we want in making a super preasure?
[10:51] <MrCraig> actually, parachute over balloon is an interesting idea that could avoid entanglement at burst? anyone?
[10:51] <jcoxon> MrCraig, your parachute would be massive in comparison (if going for high alt stuff)
[10:51] <SpeedEvil> SamSilver: That's fundamentally what a superpressure balloon is.
[10:51] <SamSilver> para material for the sphere
[10:51] <SpeedEvil> A balloon which cannot expand.
[10:51] <SpeedEvil> However.
[10:52] <SamSilver> bugger there is a however!!!
[10:52] <MrCraig> hmm, eyes up chute
[10:52] <SpeedEvil> How much weight is 12m^2 of fabric
[10:53] <russss> fabric is usually rated in gsm, like paper.
[10:54] <SamSilver> I can find out but from my experience it is very light
[10:54] <SamSilver> anyone up for a bit of google while I search for an image?
[10:55] <SamSilver> ripstop para mat is the search
[10:55] <jcoxon> bbl
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[10:55] <SamSilver> then we need the area of a 10m sphere
[10:57] <russss> the lightest ripstop nylon is ~12gsm, IIRC.
[10:57] <SamSilver> brb
[10:57] <russss> wait. 90gsm
[10:57] <SamSilver> gkewl
[10:57] <SamSilver> kewl
[10:57] <SamSilver> I was on my way
[10:57] <SamSilver> lol
[10:58] <SamSilver> then the 2pi r thing need to be calculated
[11:00] <SamSilver> 4pi r squared is the formula
[11:01] <SamSilver> would someone please mulitply this out for me
[11:01] <SamSilver> 4 x pi x (5m squared)
[11:01] <SpeedEvil> Assume pi is 3
[11:01] <SamSilver> x 90g
[11:02] <MrCraig> question - the lines that drop in the waterfall (dl-fldigi), should they be very close together? i.e. should they be close enough to put one of the red lines of the slider control onto?
[11:02] <SpeedEvil> MrCraig: each line should go over one band
[11:02] <SamSilver> 300 x 9g/m2
[11:02] <SamSilver> 90g
[11:02] <MrCraig> ok, so I need to narrow the output - thanks SpeedEvil
[11:02] <SpeedEvil> If it's nowhere near that then cherck you have the right baudrate set
[11:02] <SpeedEvil> err
[11:03] <SpeedEvil> the right seperation
[11:03] <russss> actually I found some 38gsm ripstop
[11:03] <SamSilver> 2.7kg of fabric
[11:03] <russss> when I was looking for my blimp
[11:03] <SamSilver> russss you the mad
[11:03] <russss> I just dug the spreadsheet out
[11:03] <SamSilver> opps russs you the man!!
[11:03] <russss> http://www.fabrics-n-stuff.co.uk/product_info.php?cPath=23&products_id=74&osCsid=rsdbq98jmg225h3i6g020irbv6
[11:04] <SamSilver> I made some ski jackets out of para material and it was real light
[11:04] <SamSilver> I am good with 38g/m2
[11:05] <SamSilver> so the sum looks like this now
[11:05] <SpeedEvil> russss: You were thinking ripstop + internal bladder?
[11:05] <russss> SpeedEvil: yep. It's still on the cards
[11:05] <SamSilver> yes
[11:06] <russss> it's the internal envelope which is causing some issues, I think we're going to have a go at impulse-sealing one ourselves...
[11:06] <SamSilver> 4 x 3 x (5 squared) x 38g/m2
[11:07] <SamSilver> 25 x 12 x 38
[11:07] <SamSilver> is
[11:07] <SamSilver> ???
[11:07] <SamSilver> 114
[11:08] <SamSilver> 1.14 kg for a 10m dia superpreasure
[11:08] <SamSilver> anyone dis agree with me sums?
[11:09] <SamSilver> got to add seams and stiching
[11:09] <SamSilver> and a load ring
[11:10] <SpeedEvil> 5m radius. A steradian of that is 25m^2. *12 = 300m^2 or so. *.038 = 9.5Kg
[11:10] <SpeedEvil> 10m circumference is not 10m diameter
[11:11] <SamSilver> yes but the calc is for surface area
[11:12] <SamSilver> I am sure a 3000g pops at around ......
[11:12] <SamSilver> oops
[11:12] <SamSilver> I think I made a boo boo
[11:12] <SamSilver> a 3000g latex pops at 13m dia
[11:12] <SamSilver> help
[11:15] <SamSilver> * searching .....
[11:15] <SpeedEvil> What is your problem?
[11:16] <SamSilver> well the 3000g pops at 1331cm dia
[11:17] <SpeedEvil> So?
[11:17] <SamSilver> and I have no calculator and am impatient
[11:17] <SpeedEvil> Yes you do.
[11:17] <SpeedEvil> www.google.com
[11:17] <SamSilver> was trying to calculate
[11:17] <SamSilver> lol
[11:17] <SpeedEvil> 10m is sane to use as a maximum diameter then
[11:18] <SamSilver> I will do the calculations later
[11:18] <SamSilver> but was just chatting
[11:18] <SamSilver> and then got my numbers wonky
[11:19] <SamSilver> was trying to calculate what the weight would be for making a 3000g latex into a superpreasure from adding a 10m dia para material sphere
[11:21] <SamSilver> and I get 1.14kg of fabric to cover the totex
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[11:23] <SamSilver> so with 5720g of free lift I have a lot to use on payload and stiching
[11:23] <SpeedEvil> http://www.google.co.uk/search?hl=en&safe=off&q=%284*pi%29*%28%285m%29^2%29+*.038Kg%2Fm^2&aq=f&aqi=&aql=&oq=
[11:23] <SpeedEvil> = 12Kg
[11:23] mattltm (~mattltm@92.7.175.119) left irc:
[11:24] <SpeedEvil> Assume the balloon and payload and fill are 8Kg, that takes you to 20Kg.
[11:26] <SpeedEvil> The volume is about 500m^3 - the displaced air about 750Kg (at sea level)
[11:26] <SamSilver> 4 pi x r squared x 38g/m squared
[11:26] <SpeedEvil> So you can go to where the air density is about 20/750 = 2.6%
[11:26] <SamSilver> in alti that is ??
[11:27] <SamSilver> shuu that is high
[11:28] <SpeedEvil> 2.6% = ~2600Pa
[11:28] <SpeedEvil> About 25km
[11:28] <SamSilver> speed do tell where you see problems
[11:28] <SpeedEvil> You will need a large volume of gas.
[11:29] <SamSilver> I am concerend about the ability of the stiching to holr the preasure
[11:29] <SamSilver> hold
[11:29] <SpeedEvil> Dunno
[11:29] <SpeedEvil> You need about 8m^3 of gas, I think.
[11:30] <SamSilver> I will do the calculations and then come back
[11:31] <SamSilver> started talking about my brainfart I had last night while looking at the full moon us at it nearest point to
[11:31] <SamSilver> us
[11:32] <SamSilver> I was a ZP fan untill I had a few beers last-night and thought that my vacume filled balloon was the best idea
[11:32] <SpeedEvil> It is.
[11:33] <SpeedEvil> The fill is really cheap.
[11:33] <SamSilver> then had some wine and decided that a homebuilt superpreasure was the way to go
[11:33] <SamSilver> lol
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[11:35] <SamSilver> that google calculator is very powerfull
[11:35] <SpeedEvil> It is good.
[11:36] <SamSilver> lol
[11:36] <SpeedEvil> http://www.nasa.gov/multimedia/imagegallery/image_feature_1899.html
[11:36] <SpeedEvil> Fail - they should have done ET, and SRBs, not the circle.
[11:36] <SamSilver> I just searched it under "images" and it was silly
[11:42] <SamSilver> I am still LOLing at "cheap fill" for a vacume balloon!!
[11:42] <SamSilver> [13:33] <SpeedEvil> The fill is really cheap.
[11:43] <SamSilver> bbl
[11:43] <SamSilver> time to feed the cats
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[11:44] <fsphil> late nights should be banned
[11:45] <Laurenceb> http://vimeo.com/16604842
[11:45] <fsphil> aah, gotta love TBS
[11:48] <MrCraig> morn... afternoon phill
[11:49] Action: SpeedEvil stabs.
[11:50] <SpeedEvil> I want 'low definition' options.
[11:50] <Laurenceb> http://vimeo.com/15733989
[11:50] <fsphil> morning MrCraig
[11:51] <fsphil> I want flash full-screen to work
[11:51] <Laurenceb> aiui hes using 434mhz comms with chipcon ics
[11:51] <Laurenceb> or at least was on a previous version of the setup
[11:52] <Laurenceb> but its off the shelf kit, so aiui theres no telemetery coming back, its just OSD on the 2.4GHz video
[11:53] <Laurenceb> http://www.rcgroups.com/forums/showthread.php?s=713b2ce7f1e9720e47622eed1832c8a8&t=1347971
[11:53] <Laurenceb> ^lol flamebait
[11:58] <Laurenceb> "Trappy has now been banned from RCGroups" lmao
[12:03] <russss> :/
[12:06] <fsphil> talk about over-reaction
[12:09] <Laurenceb> i was wondering if you could do FPV better with a proper telemetery link
[12:09] <Laurenceb> so the OSD is done on the groud using data sent back over 434mhz
[12:09] <Laurenceb> *ground
[12:09] <fsphil> almost certainly
[12:10] <russss> http://www.facebook.com/album.php?fbid=198515196838021&id=150360881653453&aid=47603
[12:10] <fsphil> or even 869mhz .. the limited transmit time wouldn't be a problem for small data packets
[12:10] <russss> some Copenhagen Suborbitals pics
[12:10] <Laurenceb> relying on 2.4GHz video seems a bit fragile
[12:11] <russss> their sub is looking a bit rusty
[12:11] <Laurenceb> yeah
[12:11] <Laurenceb> they need better paint
[12:12] <Laurenceb> boat paint is a massive pita
[12:14] <MrCraig> am I doing anything hideously wrong here? (please forgive the crudity of the diagram and my ignorance) - top left is an unbalasted 5v regulator http://www.craigchapman.me.uk/craig/files/ntx2diagram.PNG
[12:15] <MrCraig> resistor values from the pic were chosen by experimentation to see what brought the signal bands closer in dl-fldigi
[12:16] <MrCraig> afk a min
[12:21] <MrCraig> :-/
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[12:27] <fsphil> The last RC plane I had travelled about 50 metres down a field, I tried to turn it back and it took a dive - broke the wings off :)
[12:32] Action: Laurenceb managed to destroy an rc plane in mid air
[12:32] <Laurenceb> tried flying in ~100mph winds
[12:32] <Laurenceb> it got into such a tight spin it tore itself apart
[12:33] <fsphil> nice
[12:34] <Laurenceb> i never found the batteries
[12:34] <Laurenceb> and it had a weird Ni-MH pack
[12:36] <fsphil> I got all mine back, plus part of the field
[12:36] <fsphil> dumped most of it -- still got the motors and props though
[12:39] <fsphil> what would cause a process not to die on linux -- even with killall
[12:44] <MrCraig> ok, going to try rolling marks and spaces on seperate pins I think
[12:46] <fsphil> how close did you get them?
[12:46] <MrCraig> close
[12:46] <MrCraig> they fall about the width of the cursor bars in RTTY-50 mode
[12:47] <fsphil> there are different choices of shift in fldigi
[12:47] <MrCraig> where do I find them to config?
[12:48] <fsphil> configure -> modems -> rtty
[12:48] <MrCraig> omg
[12:48] Last message repeated 1 time(s).
[12:48] <MrCraig> it was the default bits per character!
[12:49] <MrCraig> why isn't that 8 like it should be lol
[12:49] <fsphil> haha
[12:49] <fsphil> default rtty isn't 8-bit
[12:50] <MrCraig> well I'm going to speak to mr rtty who it was named after and correct him on that! ( I know teletype )
[12:51] <MrCraig> Thank you fsphil!! There are a few minor software considerations still to take care of (the packet counter and understanding gps data with empty fields) but hardware wise I can start building!
[12:52] <fsphil> muhaha
[12:53] <MrCraig> oh and I think my checksum is wrong, but if it is it'll only be reverse the digits because I lost track of what was the least significant nibble and the most - but three weeks to tune the software is fine - without working hardware that'd be critical.
[12:54] <MrCraig> I'm far too excited to be permitted to keep posting here.
[12:54] <fsphil> lol
[12:54] <MrCraig> Someone's gonna have to temp ban me lol
[12:54] <fsphil> go solder!
[12:54] <MrCraig> no - first lunch, then solder.
[12:54] <fsphil> or combine the two
[12:54] <MrCraig> erm, tricky.
[12:55] <MrCraig> confuse the knife and the iron and there's a trip to the hospital
[12:56] <MrCraig> ok - I really am off for lunch, going to take advantage of this sunday sun as I missed it all yesterday. Back later :-)
[12:56] <fsphil> laters!
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[13:15] <mattltm> Hi all :)
[13:28] <earthshine> anyone know where to find jcoxon's guide online?
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[13:59] <fsphil> should all be on the ukhas wiki somewhere
[14:00] <mattltm> Hi fsphil :)
[14:00] <fsphil> hiya mattltm !
[14:01] <mattltm> Whapum?
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[14:03] <fsphil> whaeh?
[14:05] <mattltm> Whats going on?
[14:05] <fsphil> recovering from late night :)
[14:07] <mattltm> Did they launch?
[14:07] <earthshine> fsphil: yeah but i csnt find it
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[14:15] <earthshine> found it
[14:15] <fsphil> mattltm, ooh not sure -- I was out at a dance contest
[14:16] <fsphil> and no I didn't dance
[14:17] <mattltm> lol
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[14:27] <NigelMoby> Afternoon
[14:27] <mattltm> Hi Nigel :)
[14:28] <fsphil> ellu
[14:29] <fsphil> so what's everyone up to on this fine day?
[14:29] <NigelMoby> Resting my poor head
[14:29] <fsphil> self inflicted?
[14:30] <NigelMoby> Nooo just a nasty headache I woke up with :(
[14:30] Action: mattltm building and blowing things up.
[14:30] <fsphil> ooch
[14:30] <NigelMoby> Lol Matt
[14:30] <fsphil> best way to spend a sunday mattltm
[14:30] <fsphil> I was starting fires with my fresnel lens yesterday *g*
[14:33] <mattltm> very cool.
[14:34] <mattltm> I was getting instruction yesterday :)
[14:35] <NigelMoby> I see we're back online Matt, cheers
[14:35] <mattltm> No probs.
[14:36] <mattltm> Got the retards, ops, staff to rebuid the entire cluster.
[14:36] <NigelMoby> Lol nice 1, same problem as last time I take it?
[14:39] <mattltm> We think so. I've got the night staff stress testing it for me.
[14:41] <mattltm> Nigel: We will be changing out some of the core routing switches this week sometime. Should only take you down for about 15 mins.
[14:41] <mattltm> I'll drop you an email once it has need scheduled.
[14:43] <m1x10> i think i have done it : http://imagebin.org/143967
[14:43] <m1x10> :)
[14:45] <NigelMoby> Ah Oki Matt cheers
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[15:04] Action: mattltm_ smacks his PC.
[15:04] Nick change: mattltm_ -> mattltm
[15:05] <fsphil> don't do that.. it may start plotting revenge!
[15:05] <fsphil> horrible binary revenge
[15:05] <mattltm> Na, XP dosen't have the capacity for revenge.
[15:05] <fsphil> ah yes, the three laws
[15:06] <fsphil> control, alt and delete
[15:06] <mattltm> lol
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[15:15] <mattltm> Im just migrating my WX system over to an old dell laptop as the software I use only runs on windows.
[15:15] <mattltm> So I now have a free desktop system to run linux on/
[15:15] <mattltm> Ubuntu maybe?
[15:18] <jcoxon> slackware!
[15:18] <mattltm> I do love a bit of slackware.
[15:18] <mattltm> Maybe Arch?
[15:19] Action: jcoxon love slackware
[15:19] <mattltm> Its not a very impresive machine. P4 3.0
[15:19] <mattltm> 2Gb ram
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[15:20] Action: mattltm remembers that slackware was the first open source distro he ever installed :)
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[15:23] <fsphil> I've not tried it yet
[15:24] <SpeedEvil> I think I first installes slackware ona386/20
[15:25] <fsphil> did you get X working on that?
[15:25] <jcoxon> mattltm, try this: http://smalllinux2.sourceforge.net/
[15:25] <jcoxon> :-p
[15:26] <jcoxon> i did this a while back
[15:26] <mattltm> Lol. That is very small but I think it could cope with somthing a bit better :)
[15:26] <mattltm> And, no floppy drive!
[15:27] Nick change: SAIDias -> W0OTM
[15:28] <SpeedEvil> fsphil: yes
[15:28] <SpeedEvil> I've had linux+X+browser+networking on one floppy
[15:28] <SpeedEvil> Admittedly the browser was a stripped-down lynx
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[15:30] <jcoxon> right, fixed that longitude bug
[15:39] <Laurenceb> toshiba ac100 is coming down in price
[15:40] <Laurenceb> http://www.complexonline.co.uk/products/Computers/Netbooks/Toshiba/Toshiba-AC100-10Z-Tegra-250-1-GHz-10-1-TFT?prodid=226877
[15:41] Action: SpeedEvil sighs at the lack of trackpoints.
[15:41] <SpeedEvil> My last 10.1" toshiba netbook had a trackpoint.
[15:44] <Laurenceb> id only buy a netbook for <£150
[15:45] <Laurenceb> tho that thing is very cool
[15:45] <mattltm> I love my Acer net-vertiable
[15:45] <SpeedEvil> One USB port would be annoying
[15:46] <mattltm> Nothing like being able to "throw" a powerpoint slide from a tablet onto a digital projector during a meeting.
[15:46] <mattltm> Sudenly no one cares what you are talking about!
[15:47] <Laurenceb> SpeedEvil: it has a second mini one...
[15:47] <Laurenceb> surely that cant host tho
[15:49] <SpeedEvil> Dunno.
[15:49] <SpeedEvil> It could be.
[15:51] <Laurenceb> i thought that wasnt allowed in the spec
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[15:52] <SpeedEvil> OTG
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[15:55] <Laurenceb> http://ac100.gudinna.com/README/
[15:57] <SpeedEvil> Interesting.
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[16:48] <hibby> afternoon all
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[16:59] <mattltm> Hi Hibby.
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[17:01] <hibby> hows it coming along in here?
[17:05] <MrCraig> Just setting down with the soldering iron - even going to use a new bit :-P
[17:06] Action: jcoxon is running payload testing
[17:07] <hibby> nice. I've been soldering again this afternoon, and unsurprisingly, nothing works now.
[17:07] <hibby> oh well!
[17:07] <jcoxon> hibby, hehe
[17:07] Action: mattltm is building a HF active loop antenna
[17:07] <hibby> typical when you play with the ntx-2
[17:07] <fsphil> aah you gots the bits mattltm
[17:07] <mattltm> hibby: I had the same problem with an NTX2
[17:08] <mattltm> fsphil: Yup :)
[17:08] <mattltm> Had to get a whole bag of the toroids so let me know if you need one :)
[17:08] <jcoxon> mattltm, you going to listen out for whitestar ZP then?
[17:08] <hibby> mattltm: really? What was your issue?
[17:09] <fsphil> hopefully they get the RF problem solved - be a shame if they have to drop the HF beacon
[17:09] <mattltm> jcoxon: I have a full HF set with a nice doublet that works very well so I will listen for whitestar on that.
[17:09] <jcoxon> yeah
[17:09] <jcoxon> it would be a difficult decision to drop it
[17:09] <fsphil> I'm going to put out some more ground radials tonight, see if I can improve my vertical a bit
[17:09] <jcoxon> as they sort of need it for data collection as the sat data is quite spread out
[17:10] <mattltm> fsphil: Did your 10M mast turn up?
[17:10] <fsphil> afraid not mattltm, hopefully tomorrow
[17:11] <mattltm> You could make a nice inverted V with it.
[17:11] <fsphil> was thinking that
[17:11] <fsphil> though gotta think of the visual impact too :)
[17:11] <mattltm> http://www.mattltm.co.uk/2010/11/21/temporary-inverted-v/
[17:12] <fsphil> sweeet
[17:13] <mattltm> That was made by gaffa taping some random poles together :)
[17:13] <hibby> nice
[17:13] <fsphil> nothing fragile in the vicinity then? :)
[17:14] <mattltm> lol. Only next door's kids :)
[17:15] <mattltm> fsphil: Im tempted to build a cobweb next :)
[17:15] <fsphil> oh man those things look bizarre
[17:16] <mattltm> only 8'x 8'
[17:17] Action: hibby will stick with the end fed longwire
[17:17] <mattltm> Strange. The vertical tuned for 40M is working worse than the doublet through an atu.
[17:17] <mattltm> Usualy the other way round.
[17:19] <hibby> right - has anyone any suggestions? This ntx-2 circuit worked on breadboard, each pin is putting out the relevant voltage to the tx pin, but somewhere along the line the rtty is... stopping working: ?
[17:19] <fsphil> stopped working how?
[17:20] <MrCraig> Did you schematic or photograph the breadboard for reference?
[17:20] <mattltm> hibby: Mine was fine on a BB and the shift changed when I put it on to some strip board.
[17:20] <hibby> The ~425hz shift has become 200
[17:20] <jcoxon> mattltm, yeah thats due to a change in resistance
[17:21] <hibby> but, when I poke about with the shift in fldigi it doesn't pick it up - there's only one discernable frequency on the waterfall, and then a tone slightly lower inbetween transmissions
[17:21] <fsphil> you'd think a few ohms wouldn't make much difference
[17:21] <mattltm> jcoxon: Thats what I thought but all the measurments are the same?
[17:22] <jcoxon> hibby, sure thats not a harmonic?
[17:22] <jcoxon> have a tune around and you might find another tone
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[17:22] <Laurenceb> SpeedEvil: AC100 miniusb is for connecting it as a removable drive apparently
[17:22] <jcoxon> i have found that actually the shift is increased
[17:23] <mattltm> Thats what happend with mine. from 425Hz to 1000Hz
[17:24] <hibby> jcoxon: that's potentially it - i have two tones at identical points above and below the carrier, but I wasn't aware this was an am transmitter....
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[17:25] <hibby> ocht, lets have a look at this....
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[17:32] <fsphil> ah, BST begins next week
[17:40] <SpeedEvil> Laurenceb: ah
[17:41] <SpeedEvil> BST is silly.
[17:41] <SpeedEvil> We should move onto GMT-5 all year round.
[17:41] <SpeedEvil> That way I'd tend to be up at sensible times.
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[17:44] <MrCraig> trust me to find a connector on a piece of wire that appears to conduct electricity but not heat! *soldering grumbles* pulls out hair and mutters and whimpers uncontrollably
[17:46] <hibby> right, there's something properly wrong here.... jesus.
[17:46] Action: hibby goes looking for what's been done wrong
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[17:52] <hibby> Right, found the problem. My shift is around the centrepoint. I have one tone below 434.650, and one tone above 434.650. wtf? I have officially invented the -ve frequency, guys!
[17:52] <SpeedEvil> Tune a kilohertz lower
[17:52] <SpeedEvil> or two
[17:53] <SpeedEvil> Then all your frequencies are positive
[17:53] <hibby> if only that was the case
[17:54] <SpeedEvil> With SSB, fout=fin-tunefreq
[17:54] <SpeedEvil> with output bandpassed to 3-10khz
[17:54] <hibby> one's at 647, and the other's at 655.
[17:54] <SpeedEvil> Ok - much too much shift then
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[17:55] <hibby> indeed. Time to go hunting for random resistors and take it from there, I think.
[17:55] <hibby> as it seems my 2k2s aren't 2k2.
[17:56] <SpeedEvil> red red red?
[17:56] <hibby> 5 bands.
[17:56] Action: hibby sticks in a 4.7k 4 bander, because he can actually read them
[17:57] <SpeedEvil> red red black brown then
[17:58] <hibby> one's definately that, the other's ambiguous.
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[17:58] <SpeedEvil> I just use a meter if I have any doubt
[18:02] <hibby> the one I've got in here is untrustworthy
[18:03] <hibby> typical university kit. worst soldering iron, worst meter, and the response upon complaint "We do pay you, after all, get your own if they're that bad"
[18:04] <hibby> nope, a 4k7 didn't fix it. Same shift :/
[18:06] <fsphil> got any potentiometers handy?
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[18:07] <hibby> haha, here we go, there's a more positive looking tone
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[18:25] <MrCraig> I wonder if you were able to count, how many sins worldwide have been covered up by heatshrink
[18:25] <Dan-K2VOL> not enough
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[18:31] <hibby> there we go, almost done now.
[18:33] <MrCraig> ur lucky hibby, you're at the other end of the process coming out - I just had to get the mini grinder out an take the edge off a strip board to remove the signs of a wire that just wouldn't solder into place (I've joined it under heat shrink to a better quality wire to solder on now)
[18:36] <jcoxon> [ing Dan-K2VOL
[18:36] <jcoxon> ping*
[18:38] <hibby> MrCraig: nightmare. Most of my soldering is done - all that's left is to think about an antenna
[18:38] <hibby> this is me doing someone a favour :/
[18:38] <Dan-K2VOL> hey
[18:38] <jcoxon> Dan-K2VOL, we'll just need more listeners!
[18:38] <Dan-K2VOL> heh yeah
[18:38] <jcoxon> the power of dl-fldigi
[18:40] <MrCraig> I'll be a listner soon enough - ready to join in!
[18:40] <jcoxon> just to encourage - this is a map of all teh people who have used dl-fldigi and put in lat/lon
[18:40] <jcoxon> http://maps.google.com/?q=http://www.robertharrison.org/listen/receivers.php&t=p
[18:41] <gb73d> im keeping a eye on soutgate ham news site for baloon luanch tip offs
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[18:41] <GroupO> hibby: ping?
[18:41] <Dan-K2VOL> that's cool
[18:41] <hibby> GroupO: pong
[18:41] <GroupO> victory!
[18:41] <jcoxon> we just need to get some listeners in various atlantic islands
[18:41] <GroupO> u get my txt about the relay?
[18:42] <hibby> nope
[18:42] <Dan-K2VOL> yeah
[18:42] <hibby> yep
[18:42] <GroupO> hmmm damn fone...
[18:42] <hibby> i did
[18:42] <GroupO> ha! ok good
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[18:42] <hibby> started a reply, never got further than that, lol
[18:42] <GroupO> whats your thots?
[18:42] <GroupO> lmao
[18:42] <hibby> a) shouldn't be an issue b) what other options have you got?
[18:42] <GroupO> no worries, i was eating steak by that poing, would have been futile anyway
[18:43] <GroupO> b) not sure
[18:43] <GroupO> we need the nichrom to cut the nylon
[18:43] <GroupO> so however you think it can be done
[18:43] <hibby> well I've got a baguette, some barbequeue style chicken, barrs cola and hobnobs
[18:43] Action: SpeedEvil ponders how to use hobnobs for a cutdown.
[18:43] <GroupO> haha, will that work? seems optimistic...
[18:44] <GroupO> i would LOVE to live in a world where hobnobs were the solution to all of lifes problems
[18:44] <hibby> relay's ideal as the arduino won't provide you with enough current to do any damage to the nichrome wire, afaik
[18:45] <hibby> do you guys have access to a hacksaw?
[18:45] <GroupO> yeh, should do
[18:45] <GroupO> why?
[18:45] <hibby> need to cut this circuit out
[18:46] <hibby> and come up with some sort of antenna
[18:47] <GroupO> do u need it tonite?
[18:47] <hibby> nope, no rush.
[18:48] <GroupO> well, our stores have access to pretty much any tool you could need
[18:48] <GroupO> so it shouldnt be a problem.
[18:48] <GroupO> What do i need to bring for tomorrow to finish this up?
[18:49] <fsphil> jcoxon, high altitude relay -- receive on 40m antenna hanging below balloon, relay to the ground on 70cm :)
[18:49] <fsphil> I wonder what effect that would have on HF
[18:49] <jcoxon> fsphil, hehe
[18:50] Action: SpeedEvil wonders.
[18:50] <SpeedEvil> I wonder if you can get more gain with a antenna longer than a quarter wave
[18:50] <SpeedEvil> In the real worls
[18:50] <SpeedEvil> d
[18:51] <fsphil> supposedly a 5/8 wave has higher gain
[18:51] <hibby> SpeedEvil: can make a small paralell resonant circuit and use a half wave wire...
[18:51] <hibby> s/paralell/parallel
[18:51] <fsphil> ooh -- an HF collinear
[18:51] <SpeedEvil> I suppose that if you have incoming signals coming in at an angle it'd not work so well.
[18:51] <SpeedEvil> Which could bethe case for some propagation modes.
[18:53] <fsphil> is the launch still tonight?
[18:53] <Dan-K2VOL> it's tentatively 0000UTC 22 March
[18:54] <fsphil> ah, tomorrow night
[18:54] <fsphil> what's the jet-stream doing?
[18:54] <Dan-K2VOL> africa
[18:55] <hibby> GroupO: you coming back in tonight?
[18:56] <GroupO> hibby: i can do if need something - its no worries cos i have the car
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[18:56] <hibby> nah, was just wondering - im now at the stage I can pack all this stuff up and wonder off home with it, is all
[18:58] <GroupO> ahh, rite yeh thats kl man
[18:58] <GroupO> be my guest!
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[19:28] <jcoxon> can anyone on here compile windows binaries?
[19:29] <MrCraig> what compiler?
[19:29] <jcoxon> its C
[19:29] <jcoxon> http://wiki.ukhas.org.uk/code:emulator#emulatec
[19:30] <MrCraig> hmm - I could but would have to dload and install a suitable compiler - if there's no one with the right setup already knock again?
[19:30] <jcoxon> MrCraig, hence my request :-)
[19:31] <MrCraig> kk - looks like a straight forwards single source - I'll dload gcc
[19:32] <MrCraig> you need win32 or 64?
[19:32] <jcoxon> 32
[19:32] <MrCraig> kk cool
[19:33] <jcoxon> i assume
[19:34] <MrCraig> then most likely, 64 would benefit performance but only be compatible with 64-bin where-as 32-bit runs everywhere. I think the performance diff is negligable though
[19:35] <jcoxon> not my machine
[19:38] <MrCraig> well they seem to compile without problems, not certain how to test them but uploading now, links in a sec
[19:40] <MrCraig> http://www.craigchapman.me.uk/craig/files/GPSgen.zip http://www.craigchapman.me.uk/craig/files/Emulate.zip
[19:41] <jcoxon> great
[19:42] <jcoxon> Dan-K2VOL, see emulate binary just linked
[19:42] <griffonbot> @LVL1WhiteStar: Working hard to get to launch window tomorrow. Not sure how likely, the prediction system is broken at the moment. #arhab [http://twitter.com/LVL1WhiteStar/status/49556372785872896]
[19:47] <earthshine> jcoxon: ping
[19:47] <jcoxon> hey earthshine
[19:48] <earthshine> jcoxon: Hi. Can you point me to where I can DL your V3 of the TinyGPS library please
[19:48] <earthshine> the version Ihave is throwing up errors saying that navstatus doesn't exist
[19:48] <jcoxon> oh yeah i've regressed back to using that one
[19:48] <jcoxon> as in the one on the wiki
[19:48] <jcoxon> navstatus is not reliable at all
[19:49] <earthshine> ahh ok
[19:50] <MrCraig> since listening to hab data - every machine I hear appears to have an rtty ring behind it.
[19:50] <jcoxon> MrCraig, welcome to habbing
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[19:50] <Laurenceb> lol
[19:50] <MrCraig> lol is that like sticking your thumb makes you a fisherman?
[19:51] <Lunar_Lander> hello
[19:51] <MrCraig> hi LL
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[19:56] <jcoxon> VE2JOR-11 is a flight to watch
[19:56] <jcoxon> they are working on a trans-a flight attemp
[19:56] <jcoxon> this flight seems to be a solar tetroon
[19:56] <Dan-K2VOL> right now/
[19:57] <jcoxon> not sure its an actually attempt
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[19:57] <jcoxon> http://raqi.ca/braq/projets/braq11-2/braq11-2.htm
[19:58] <Dan-K2VOL> neat
[20:08] <jcoxon> bbl
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[20:10] <Lunar_Lander> Dan-K2VOL I watched your payload tour and saw the solar shield for the air temperature sensor
[20:11] <Lunar_Lander> it is good that it has ir outlets
[20:11] <Lunar_Lander> air
[20:11] <Dan-K2VOL> yes, I wish the helium one did
[20:11] <Lunar_Lander> yeah
[20:11] <Lunar_Lander> btw did you get the suggestion of having the sensor point a few degrees off the vertical so it doesn
[20:11] <Lunar_Lander> doesn't face the ballast container
[20:12] <Dan-K2VOL> I did, we'll see if we can
[20:13] <Lunar_Lander> sounds good :)
[20:13] <Lunar_Lander> I'll be right back
[20:13] <Dan-K2VOL> k
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[20:13] <Dan-K2VOL> great
[20:30] <Lunar_Lander> back again
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[20:34] <LazyLeopard> Hiya mattltm. Have fun yesterday?
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[20:41] <mattltm> Hi Lazy. Yes it was good :)
[20:42] <mattltm> Shame you didn't pop in and say hello :)
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[20:47] <LazyLeopard> I was busy laying radials in my lawn. Gotta take advantage of dry days. ;)
[20:48] <LazyLeopard> Also, I knews the course was going to be rather busy, and didn't want to get in the way.
[20:49] <mattltm> Lol. I was done building by about 12. Just sat about having a chat with the instructors and a few of the other students.
[20:50] Action: LazyLeopard was listening to John G8MNY on the SRCC net this morning. He mentioned some of it was a bit of a juggle. One VFO and 11 students.
[20:51] <mattltm> Lol. Yup. That one look John longer to explain to me than it took me to do it :)
[20:51] <jcoxon> mattltm, can i sign up for your kent hackerspace for when i move in august :-)
[20:51] <mattltm> Then, just to make a point, John gave me a double screen coax and a stupid plug to solder!
[20:52] <mattltm> It's not mine jcoxon, it's yours :)
[20:52] <LazyLeopard> Heh!
[20:52] <jcoxon> mine?!?
[20:52] <mattltm> Sure, you join and it's yours.
[20:53] <jcoxon> haha
[20:53] <LazyLeopard> He said he'd got a few interesting bits of junk for folks to solder. ;)
[20:53] <jcoxon> you just finding hte space
[20:53] <mattltm> It will end up as as community driven project.
[20:53] <Lunar_Lander> xD
[20:53] <jcoxon> fair enough
[20:53] <Lunar_Lander> why stupid plug?
[20:53] <jcoxon> well i won't be up until august
[20:53] <LazyLeopard> PL259, I'd guess?
[20:54] <mattltm> Lunar: It was a weird PL259 with a strange unscrewey bit.
[20:54] <Lunar_Lander> oh
[20:54] <Lunar_Lander> and that was hard to solder then?
[20:54] <mattltm> jcoxon: I, with me work hat on, have pushed the idea through our board and secured a small ammount of funding and the use of the space.
[20:55] <jcoxon> excellent
[20:55] <jcoxon> happy to run a course or two
[20:55] <mattltm> Lunar: Not hard to solder. The double screen coax was the hard part. The inner braid went inside the plug and the outer went over the outed but under a bit of the inner!
[20:56] <Lunar_Lander> oh ok
[20:56] <mattltm> Great jcoxon. Were are you moving to?
[20:57] <jcoxon> we are going to look for somewhere in canterbury
[20:57] <mattltm> Cool. Canterbury will have their own hackspace soon so I am told :)
[20:57] <jcoxon> oh right
[20:58] <mattltm> But ours is cooler :)
[20:58] <jcoxon> that could be a bit more convenient :-p
[20:58] <jcoxon> i'll visit the north kent one as well
[20:58] <mattltm> If you must :p
[20:58] <jcoxon> oi oi
[20:58] <mattltm> lol
[20:59] #highaltitude: mode change '+o jcoxon' by ChanServ!ChanServ@services.
[21:00] Action: fsphil should start a hackerspace .. though I'd be the only one there :D
[21:00] <mattltm> lol
[21:01] <mattltm> fsphil: You should be taking part in the Irish net on 80M at the moment
[21:01] <fsphil> id' probably not hear them
[21:02] <mattltm> Worth a shot :)
[21:02] <Lunar_Lander> :)
[21:05] <Zuph> ping jcoxon
[21:05] <jcoxon> hey Zuph
[21:06] <Zuph> Thanks for the GPS stuff :)
[21:06] <fsphil> not a peep
[21:06] <Zuph> Who compiled the windows binary of the emulator for us?
[21:06] <jcoxon> MrCraig,
[21:06] <jcoxon> i adapted the bash script
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[21:06] <jcoxon> and steve (rocketboy) wrote the code
[21:07] <MrCraig> hi jc
[21:07] <jcoxon> Zuph, -> MrCraig
[21:07] <Zuph> Any way to easily increase the update rate to something like 5hz?
[21:07] <MrCraig> aah read up :)
[21:08] <jcoxon> Zuph, your gps runs at 5hz?!?
[21:08] <jcoxon> or want to run it asap
[21:08] <MrCraig> um - you'd have to mod the source and send the new one over, I'm not a C dev and would likely mess up something unless it's a simple constant
[21:08] <Zuph> jcoxon: Runs *reliably* at 5hz. Up to 10, but in NMEA mode it's kind of screwy
[21:09] <jcoxon> just to say that teh gps log flight path very early crosses the meridian
[21:10] <MrCraig> I have a short somewhere in my soldering :-(
[21:11] <Zuph> Also, any way to ensure a newline before each $?
[21:11] <jcoxon> you using hte windows binary?
[21:12] <Zuph> Yeah, I haven't actually tested anything. Does it output pure NMEA strings when redirected to the com port?
[21:12] <jcoxon> yes
[21:13] <Zuph> alright then :)
[21:13] <jcoxon> dynamically generated nmea
[21:13] <Hiena> Hmmm...Anybody has experience with Polstar PGM-248A? I want to set to higher the GPS sample rate.
[21:13] <jcoxon> as it works its way through the txt file
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[21:17] <MrCraig> jcoxon: Zuph: if you need a recompile pls IM me, I'm frequently afk at the moment.
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[21:20] <jcoxon> it would need a bit of fiddling - so let them test it first :-p
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[21:34] <earthshine> jcoxon: any idea why I get valid GPS strings and yet no data in the RTTY string?
[21:34] <earthshine> It's like TinyGPS isn't able to parse it
[21:35] <jcoxon> yes!
[21:35] <jcoxon> i do
[21:35] <jcoxon> i had this problem yesterday
[21:35] <jcoxon> something has changed in the arduino libs
[21:35] <Lunar_Lander> hey earthshine how's life?
[21:35] <earthshine> the time, lat and lon are just coming back as o's
[21:36] <earthshine> Lunar_Lander: hey
[21:36] <jcoxon> earthshine, it works with version 18
[21:36] <jcoxon> so i've rolled back my IDE
[21:36] <jcoxon> i can not work out why it doesn't work
[21:36] <earthshine> ahh ok let me try that
[21:36] <jcoxon> i think they may have shortened the rx buffer
[21:37] <earthshine> weird
[21:38] <jcoxon> yeah
[21:40] <MrCraig> *phew* cleared the short
[21:44] <Lunar_Lander> earthshine I had an idea
[21:44] <Lunar_Lander> the "two computer strategy"
[21:50] <Lunar_Lander> the arduino uno runs GPS and NTX2
[21:51] <Lunar_Lander> the sensors and SD recorder are run by an arduino mega
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[21:52] <Dan-K2VOL> lunar_lander, that's sure how we do it
[21:53] <Dan-K2VOL> we've got 6 microcontrollers
[21:53] <Dan-K2VOL> onboard
[21:54] <jcoxon> Lunar_Lander, why not run everything off a mega then?
[21:54] <jcoxon> certainly has all the pins
[21:54] <jcoxon> Dan-K2VOL, what time is simulation?
[21:54] <Lunar_Lander> ah
[21:54] <Lunar_Lander> well yeah but I already have the Uno and I'll use it to learn how to do it
[21:55] <jcoxon> Lunar_Lander, the code will be portable between the 2
[21:55] <Lunar_Lander> ah
[21:56] <jcoxon> there are pros and cons to using 2 microprocessors
[21:56] <jcoxon> often the weakest link is the comms between the 2
[21:56] <Dan-K2VOL> when we get all this stuff ready :-) sorry
[21:56] <Dan-K2VOL> sometime within the next few hours
[21:56] <jcoxon> no worries i'll be asleep soon anyway - expected to miss it
[21:56] <Lunar_Lander> oh
[21:57] <Lunar_Lander> I had the idea to have no connection between the two
[21:57] <Dan-K2VOL> we've had very good luck using the i2c at 400khz
[21:57] <jcoxon> Lunar_Lander, even better
[21:57] <Dan-K2VOL> 100khz, excuse me
[21:57] <earthshine> jcoxon: no difference in 0018
[21:57] <Dan-K2VOL> the arduino wire library makes it very simple
[21:57] <jcoxon> earthshine, strange - i had this issue yesterday but solved it with that change
[21:57] <Dan-K2VOL> might be immune to RFI, but might not :-P
[21:58] <jcoxon> Dan-K2VOL, have you added a timeout to your i2c commands?
[21:58] <jcoxon> so if one section goes down it doesn't hang
[21:58] <jcoxon> ?
[21:58] <Dan-K2VOL> yes definitely
[21:58] <Dan-K2VOL> and a retry
[21:58] <jcoxon> cool cool - will have a browse of your code then
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[22:02] <earthshine> this is most irritating
[22:02] <Lunar_Lander> so the Uno does only Comms
[22:02] <Lunar_Lander> and the science gets done by the Mega
[22:03] <jcoxon> Lunar_Lander, that will work
[22:03] <Zuph> ping jcoxon
[22:03] <jcoxon> earthshine, i added in the stat code and found that it was failing its checksums
[22:03] <Lunar_Lander> by that I have many slots for sensors
[22:03] <jcoxon> Zuph, pong
[22:03] <Lunar_Lander> and the sensors do not mess with the GPS position downlink
[22:03] <Zuph> I appear to be getting invalid checksums from your gps sim
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[22:05] <jcoxon> really?
[22:05] <jcoxon> just checking some of them now
[22:05] <jcoxon> certainly the ones in the log file are correct
[22:06] <jcoxon> i wonder if the emulate.c amends them
[22:06] <jcoxon> any chance you could run my bash script?
[22:06] <earthshine> jcoxon: stat code?
[22:08] <Zuph> jcoxon: Please hold
[22:08] <jcoxon> earthshine, gps.stats(&chars, &sentences, &failed_checksum);
[22:08] <jcoxon> see: http://arduiniana.org/libraries/tinygps/
[22:09] <Lunar_Lander> ping Dan-K2VOL
[22:09] <Dan-K2VOL> hey lunar
[22:10] <Lunar_Lander> I need to tell you my schedule before the launch
[22:10] <Lunar_Lander> can I have your e-mail once again please?
[22:15] <Zuph> jcoxon: you're generating valid checksums
[22:15] <Zuph> jcoxon: I just think they're bad for some reason.
[22:16] <jcoxon> oh
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[22:19] <jcoxon> Zuph, thats a bit odd
[22:24] <Zuph> It is. I don't have time to debug it right now, unfortunately. We've already done unintentional, nondocumented tests of prime meridian crossing.
[22:24] <jcoxon> no worries
[22:24] <Dan-K2VOL> thank you for trying to get that going guys
[22:24] <jcoxon> you should have cut down by then!
[22:24] <Zuph> heh
[22:25] <jcoxon> well if you need anything rapidly coded give me a shout - its what i do best
[22:25] <Zuph> heh, will do! How's the back, btw?
[22:25] <jcoxon> improving
[22:25] <Zuph> Good!
[22:25] <jcoxon> well enough to go to work tomorrow :-p
[22:26] <jcoxon> Dan-K2VOL, do you want me to recruit listeners tomorrow morning?
[22:26] <jcoxon> send out to the mailing lists etc?
[22:26] <Dan-K2VOL> if we're going to fly
[22:26] <jcoxon> yeah
[22:26] <Dan-K2VOL> we'll have the reveiew in 30 minutes
[22:26] <jcoxon> appreciate you won't know till after you've launched :-p
[22:27] <Dan-K2VOL> ha
[22:27] <Lunar_Lander> when is launch time in UTC?
[22:27] <Dan-K2VOL> 0000
[22:27] <jcoxon> okay well check tomorrow morning
[22:27] <Lunar_Lander> ah
[22:27] <jcoxon> and will email then
[22:27] <Lunar_Lander> wait
[22:27] <Dan-K2VOL> to 0200 depending on prelaunch fumbling ;-)
[22:27] <Lunar_Lander> that is in 90 minutes!
[22:27] <Dan-K2VOL> tomorrow Kevin
[22:27] <Lunar_Lander> oh ok
[22:27] <imrcly> yeah
[22:27] Action: Lunar_Lander 's heart rate decreases again
[22:27] <Dan-K2VOL> haha
[22:28] <Lunar_Lander> Great Scott!
[22:28] <Lunar_Lander> (who recognizes the quote?)
[22:29] <Dan-K2VOL> I do :-)
[22:29] <imrcly> i do, scott was a cool dude
[22:29] <Dan-K2VOL> marty
[22:29] <Lunar_Lander> yeah
[22:29] <Lunar_Lander> :)
[22:29] <Lunar_Lander> btw in the german version, he says "Great God"
[22:30] <Dan-K2VOL> that's odd
[22:30] <Lunar_Lander> yeah
[22:30] <Dan-K2VOL> a more common phrase over there?
[22:30] <Dan-K2VOL> not that we use great scott over here really either
[22:31] <imrcly> weebly wobbly
[22:31] <jcoxon> okay night all
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[22:41] <Lunar_Lander> oh sorry
[22:41] <Lunar_Lander> Dan-K2VOL yeah people tend to say Great God here
[22:42] <Dan-K2VOL> ahh
[22:46] <Lunar_Lander> xD there is a poem
[22:46] <Lunar_Lander> and because people sometimes say "Oh Gott, oh Gott"
[22:47] <Lunar_Lander> the poem said "gottogott"
[22:47] <Lunar_Lander> xD
[22:47] <Dan-K2VOL> heh
[22:52] <Lunar_Lander> yea
[22:52] <Lunar_Lander> btw did you calibrate the sharp sensor?
[22:52] <Dan-K2VOL> not at all
[22:52] <Dan-K2VOL> lol
[22:53] <Lunar_Lander> oh ok
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[22:53] <Lunar_Lander> the thing is
[22:53] <Lunar_Lander> we can do thermal tests of our payloads
[22:54] <Lunar_Lander> but a complete test chamber would be interesting
[22:54] <imrcly> you can come use ours
[22:54] <Zuph> It's a bit of a drive...
[22:57] <NigelMoby> Ffs
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[23:02] <fsphil> I wish this flight was going be a little earlier :) I doubt I'll be able to stay up during the week
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[23:07] <natrium42> fsphil: caffeine
[23:09] <fsphil> it's the alarm at 7am that's the problem ;)
[23:12] <imrcly> no go for flight :'(
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[23:13] <griffonbot> @LVL1WhiteStar: We are NO GO for flight tomorrow. NO GO REASONS: Weather, New telemetry commands not tested, Sat msg queue implemt, ATC Crew absent. #arhab [http://twitter.com/LVL1WhiteStar/status/49609534746013696]
[23:14] <SpeedEvil> :/
[23:15] <fsphil> eek
[23:15] <Zuph> :(
[23:15] <Zuph> None of the ATC team called into the go/no-go conference call.
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[23:18] <fsphil> what does that mean, in regards to another attempt?
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[23:24] <Lunar_Lander> what happened?
[23:24] <Lunar_Lander> sorry my dad and I had a dispute
[23:27] <natrium42> no go for tomorrow
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[23:36] <SpeedEvil> http://www.google.co.uk/search?source=ig&hl=en&rlz=&q=btu%2Fh&aq=f&aqi=g3g-s1g6&aql=&oq=
[23:36] <SpeedEvil> I wonder if anyone in the history of google calculator has ever wanted that result.
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[23:45] <Lunar_Lander> thanks natrium42
[00:00] --- Mon Mar 21 2011