highaltitude.log.20100212

[00:00] <jcoxon> basically temp0 is pump temperature, temp1 is GPS and temp2 is external
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[00:02] <jcoxon> night all
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[06:28] <rjharrison> ping natrium42
[06:28] <rjharrison> How did you get on last night
[06:28] <rjharrison> Moring juxta
[06:28] <rjharrison> morning
[06:30] <natrium42> hi
[06:30] <natrium42> still working on ti
[06:30] <natrium42> *it
[06:30] <natrium42> pixel art took too long...
[06:31] <rjharrison> lol
[06:31] <Endeavour> Das Natrium
[06:32] <rjharrison> I'm looking forward to the results. Do you think they will be in place for Launch Tomorrow?
[06:32] <natrium42> maybe
[06:32] <rjharrison> Cool
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[06:38] <rjharrison> right work beckons
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[08:35] <rjharrison_> Hey
[08:39] <rjharrison_> natrium42 any samples to play with out there?
[08:39] <natrium42> well, i can show you what i got so far...
[08:40] <rjharrison_> Cool :)
[08:40] <rjharrison_> PM me if you like
[08:44] <natrium42> rjharrison_, http://spacenear.us/tracker/index2.php
[08:45] <icez> that's nice
[08:48] <rjharrison_> natrium42 cool!
[08:48] <rjharrison_> I do like that
[08:48] <natrium42> changed vehicle colours to be different
[08:49] <natrium42> got a set of 4 colours for each vehicle, hope that's enough for now :P
[08:49] <rjharrison_> That is a good idea
[08:49] <natrium42> http://spacenear.us/tracker/images/markers/
[08:57] <rjharrison_> Can you change the headings for the status bars to match the colour of the line
[08:57] <rjharrison_> Sorry had a phone call
[08:57] <rjharrison_> sor horus would be in blue
[08:57] <natrium42> hmm, sure
[08:57] <rjharrison_> Does that make sense?
[08:58] <natrium42> i need to match the line colours to vehicle colours too
[08:58] <rjharrison_> Is it a good idea or just put a square with the line colour (color) in the status box
[08:58] <rjharrison_> :)
[08:59] <natrium42> well, i already put the vehicles in there
[08:59] <natrium42> did you refresh?
[09:00] <rjharrison_> Oh cool
[09:00] <rjharrison_> Your are ahead of me
[09:00] <natrium42> hehe
[09:00] <rjharrison_> The line for the balloon is the path on the ground I assume and the baloon it's self is like in 3d space above the last known point?
[09:03] <natrium42> yeah
[09:04] <natrium42> hmm, balloon icon in the boxes looks better than just the payload
[09:04] <natrium42> is it ok that there is some text overlapping?
[09:04] <rjharrison_> I think it would still help to have the vehicle titles in the same colours as the lines or at least a marker. It's more obv. for the chase cars with the icon but it would help for the balloon. How do you know the difference between a balloon and a chase car? Thinking of dual balloon launches
[09:05] <natrium42> right now, i just look for "chase" or "car" in vehicle name
[09:05] <natrium42> but we could add a property
[09:06] <natrium42> about to go to bed
[09:06] <rjharrison_> Sure you have done loads
[09:06] <rjharrison_> Must be shattered
[09:06] <natrium42> in the day i will add points to the tracks
[09:06] <rjharrison_> I'v been sleeping all night whilst you have done that :)
[09:06] <natrium42> hehe
[09:07] <rjharrison_> 1 px padding around the balloon image would look nicer in the status bar
[09:07] <natrium42> also i'll add a way to turn off tracks
[09:07] <natrium42> chase cars would have them off by default
[09:07] <rjharrison_> Yep that would be most cool
[09:07] <natrium42> yeah, i need to change the way the info box is drawn...
[09:07] <rjharrison_> Wow natrium42 it rocks !!! Will have to bring the listener up to scratch
[09:08] <natrium42> thx
[09:08] <natrium42> did you notice the horizon line?
[09:08] <rjharrison_> I do think payload ID is useful car,balloon
[09:08] <natrium42> i should also make it off by default...
[09:08] <rjharrison_> and in theory listener
[09:08] <natrium42> yeah, maybe later we'll add more vehicle types
[09:09] <natrium42> like ships :P
[09:09] <rjharrison_> lol
[09:10] <rjharrison_> I like the circle
[09:10] <natrium42> and a car with a huge parabolic dish on top
[09:12] <MikeMc68> morning
[09:12] <natrium42> g'nite
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[09:13] <LazyLeopard> Hiya
[09:13] <rjharrison_> That is the horzon
[09:13] <rjharrison_> piss
[09:13] <rjharrison_> he's gone
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[09:52] <MikeMc68> I hope this snow goes away
[09:52] <MikeMc68> I don't fancy driving 250 miles if it's snowing
[10:01] <Laurenceb> where are you driving to?
[10:02] <MikeMc68> The Wirral, Cheshire
[10:05] <Laurenceb> ah
[10:05] <LazyLeopard> Yeah. Much chatter via GB30K about snow...
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[10:35] <MikeMc68> yup
[10:47] <LazyLeopard> Not tracked down anything RTTYish to test my setup with, but the waterfall seems to show something appropriate, so I guess I'll just see when there's real signal...
[10:48] <MikeMc68> Rick the very first time I picked up RTTY from the payload I had not tested at all - even with the sample wav
[10:48] <MikeMc68> Just with a tweak here and there I was receiving the GPS data within about 5 mins
[10:49] <MikeMc68> it's pretty simple - if you can hear the payloads transmission - which you will - then all you do is click the waterfall in the centre of the two lines ad the rest is pretty much automatic
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[10:50] <MikeMc68> Unless anyone on here knows of a freq. where there is guaranteed to be any RTTY ?
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[10:57] <LazyLeopard> Fair enough. I'm wondering a bit how to manage the yagi and the computer...
[11:11] <LazyLeopard> ...which reminds me... Is there a preferred polarisation for the signal?
[11:14] <juxta> LazyLeopard: most payloads use vertical
[11:17] <LazyLeopard> Cheers. That's what I'd guessed was more likely. ;)
[11:26] <MikeMc68> Do you have a laptop with wifi Rick?
[11:26] <MikeMc68> If so you can take it all outside
[11:26] <MikeMc68> Alternatively find some way of mounting the Yagi and then just pop out now and then to readjust its direction
[11:30] <LazyLeopard> I figure early stages I can see from the window which has a view that just about takes in North, and gets round to about South West.
[11:31] <LazyLeopard> Yeah. Stick it on a pole in a garden umbrella stand... I've got a 10metre feeder cable.
[11:31] <russss> MikeMc68: http://en.wikipedia.org/wiki/RTTY#Primary_users
[11:31] <russss> assuming you have the receiver
[11:36] <MikeMc68> Rick will - i've only got a 70cm receiver
[11:50] <LazyLeopard> Thanks. That's enough to show the setup should work OK.
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[11:57] <MikeMc68> Receiving any of those Rick ?
[12:14] <juxta> MikeMc68, I bought a couple of those Falcom FSA03 GPS modules
[12:15] <juxta> & have worked them into the design of the board - the esawdust guys sent me the footprint straight away :)
[12:15] <MikeMc68> great
[12:16] <juxta> how did you find the store by the way?
[12:20] <LazyLeopard> Mike: Not exactly decoding them, but they look the part, and given the correct parameters I expect they woul decode.
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[12:54] <MikeMc68> Juxta: Sorry I can't remember
[12:54] <MikeMc68> Rick - great stuff
[12:54] <juxta> no worries MikeMc68
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[13:39] <gb73d> i can monitor tomorrow from Reading Berkshire
[13:41] <gb73d> ham call M1ELK, have a Yaesu VR5000 scanner with loft mounted 446mhz gp
[13:43] <gb73d> on rg213 w jim 75 preamp at loft end
[13:43] <gb73d> have tracked the spirit of knoxville balloon on 10mhz a few yearc back
[13:44] <gb73d> GOOD LUCK hope weather holds
[13:44] <gb73d> its gonna be a BONANZAAAAAAAAAAAAAAAAAAAAAAAAAA!!!
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[13:46] <jcoxon> afternoon all
[13:46] <gb73d> high
[13:46] <gb73d> altitude !
[13:46] <russss> hi jcoxon
[13:46] <gb73d> i can monitor tomorrow from Reading Berkshire
[13:46] <jcoxon> gb73d, great
[13:47] <russss> I've again failed to get the components to receive, so I'm going to tinker with my telemetry processing stuff tomorrow :P
[13:47] <jcoxon> do you have dl-fldigi?
[13:47] <gb73d> cheers i am looking forward to it
[13:47] <gb73d> good luck all
[13:47] <jcoxon> russss, hack a cable!
[13:47] <russss> the only RF cable I have is really thin
[13:47] <russss> RG158 or something
[13:48] <jcoxon> maplins sat morning!
[13:48] <russss> heh
[13:48] <SpeedEvil> losses at 433MHz are not high
[13:48] <SpeedEvil> And even 3 or 6dB isn't a nightmare
[13:49] <russss> I could try it
[13:49] <russss> all the kit is at the hackspace though so it's whether I can be arsed to go over there.
[13:51] <jcoxon> it'll be fun! interesting to see the radios performance
[13:54] <gb73d> i wud use the new coax
[13:54] <gb73d> best quality u can get
[13:57] <SpeedEvil> Practically for only a few meters at 433MHz - almost any coax will have very little loss
[13:57] <SpeedEvil> the cheap stuff used for installing sat dishes will do well under 1dB
[13:57] <gb73d> i was going to suggest sat cable its good
[13:58] <gb73d> rg58 is v lossy at 432 mhz
[13:59] <russss> it's RG174. Very thin.
[14:00] <russss> 25dB/100ft at 440MHz
[14:01] <SpeedEvil> http://www.ocarc.ca/coax.htm
[14:01] <SpeedEvil> says 4m or so is 3dB
[14:01] <SpeedEvil> so usable with a short connection
[14:01] <russss> unfortunately I need a lot more than 4m
[14:01] <SpeedEvil> k
[14:01] <russss> because I need to run it up to my roof
[14:01] <SpeedEvil> ah
[14:01] <russss> otherwise I have very little line of sight
[14:02] <gb73d> RG-174/U 50 0.48 mm Solid PE 0.100 2.5 0.100 2.55 single 0.66 Common for wifi pigtails: more flexible but higher loss than RG58; used with LEMO 00 connectors in NIM electronics
[14:03] <russss> "soon" when my top floor is done, I'll be moving my PC upstairs, and then I'll have much easier access/shorter run to the roof.
[14:04] <gb73d> i have holes in the ceiling going up to the loft
[14:04] <russss> then I'll run a decent cable or two up
[14:04] <gb73d> ive got 5 !
[14:04] <russss> heh, cool
[14:04] <gb73d> 3 rg213 and 2 rg58
[14:06] <jcoxon> bbl
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[17:09] <jcoxon> evening all
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[17:10] <jcoxon> back in london - so time to get this payload in the air
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[17:15] Nick change: j0n__ -> ei7ig
[17:15] <jcoxon> evening ei7ig
[17:16] <ei7ig> evening
[17:16] <ei7ig> just trying to get set up here for tomorrow
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[17:17] <jcoxon> great
[17:17] <jcoxon> if only i could persuade people to input their gps in decimal degress
[17:17] <jcoxon> it makes me sad when i can't see all the listening stations on the map
[17:18] <ei7ig> heh.. yeah.. oh well.
[17:18] <ei7ig> question
[17:18] <ei7ig> two actually
[17:18] <ei7ig> what's the kick off time.. and whats the link again for the RTTY settings?
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[17:19] <jcoxon> ei7ig launch will be at 15:00UTC
[17:19] <ei7ig> ok.. before the rugby.. good good
[17:20] <MikeMc68> evening
[17:20] <jcoxon> and RTTY settings, if you are using dl-fldigi if you go to the the DL-Client tab and reselect Atlas
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[17:20] <jcoxon> it'll then automagically reset up dl-fldigi
[17:21] <ei7ig> hmmm
[17:21] <ei7ig> doesnt' seem to be
[17:21] <jcoxon> select another payload then select it again
[17:22] <ei7ig> did that... yeah it pulled them in.. but I've (deliberately ) set fldigi to psk... it doesn't change it out of that.. is it simply RTTY-50 from the menu or do I need to do more?
[17:22] <jcoxon> nah its custom
[17:22] <jcoxon> rtty custom i think
[17:24] <jcoxon> hehe noisebridge on make
[17:24] <ei7ig> ok.. cool.
[17:24] <ei7ig> I'll leave the client run for a bit to be sure it's ok..
[17:25] <ei7ig> I'll drop in before launch tomorrow as well.
[17:25] <jcoxon> ei7ig, due to drift you'll need to tune dl-fldigi to the correct freq
[17:25] <ei7ig> will AFC not deal with it?
[17:25] <jcoxon> its afc isn't great at find the signal
[17:25] <jcoxon> once its got it it should be fine
[17:25] <jcoxon> finding*
[17:26] <ei7ig> ok.. yeah.. that's the plan.. but you'll be competing with Ireland vs France!
[17:26] <jcoxon> hehe, we'll by flying far longer then the rugby
[17:27] <ei7ig> yeah I know.. i'm only pulling your lef
[17:27] <ei7ig> leg even
[17:27] <jcoxon> :-)
[17:29] <jcoxon> okay forecast still the same
[17:31] <ei7ig> hmmm. i'mm pulling audio from the de-emphasised (9k6) port of the 847.. that shouldn't make a difference... (Currently using it for AX25 reception from ISS)
[17:32] <jcoxon> ei7ig, don't think it will
[17:32] <jcoxon> but i'm not too sure
[17:32] <jcoxon> we'll find out tomorrow :-p
[17:32] <ei7ig_laptop> indeed we will..
[17:33] <ei7ig_laptop> sorry.. changed machine (obviously).
[17:33] <LazyLeopard> /me makes a note to check for ISS passes...
[17:33] <jcoxon> hehe
[17:33] <ei7ig_laptop> right I'll toddle off and do some shack re-arranging.
[17:34] <jcoxon> LazyLeopard, ^^^
[17:34] <LazyLeopard> Heh. I've got sattrack installed at home.
[17:34] <jcoxon> fair enough
[17:34] <ei7ig_laptop> I use predict on linux
[17:35] <LazyLeopard> ...but it's geared for visible passes (for the local astronomical society) so I'll just have to tweak it a bit...
[17:35] <LazyLeopard> Yep, running sattrack on linux here, too.
[17:35] <LazyLeopard> ...but dl-fldigi on MacOS X
[17:36] <jcoxon> LazyLeopard, dl-fldigi runs on linux :-)
[17:36] <LazyLeopard> (Tiger... which required a build-from-source.)
[17:37] <jcoxon> LazyLeopard, if you make a bundle could stick it on for download?
[17:37] <LazyLeopard> Sure, but I don't have a linux box with sound input anywhere handy. ;)
[17:37] <jcoxon> oh right
[17:37] Nick change: sbasuita_ -> sbasuita
[17:37] <LazyLeopard> Sure. Where?
[17:37] <jcoxon> pm me your email address and i'll add you as a contributer
[17:38] <jcoxon> well a committer
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[18:13] <jcoxon> is there a way to disappat static
[18:13] <jcoxon> i'm finding my insulation is seems to be sticking to me :-p
[18:13] <SpeedEvil> furniture polish
[18:13] <SpeedEvil> alternatively - a spray-bottle of water
[18:14] <jcoxon> could it be an issue inflight?
[18:14] <SpeedEvil> I find also - a _shark_ knife with a thin blade works well
[18:14] <SpeedEvil> sharp
[18:14] <SpeedEvil> at cutting without making dust
[18:14] <SpeedEvil> you spray it on you - and then the stuff brushes off
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[18:52] <rjharrison> Evening all
[18:53] <jcoxon> evening rj
[18:53] <jcoxon> rjharrison,
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[19:09] <Lunar_Lander> hello
[19:13] <Lunar_Lander> hi jcoxon
[19:13] <jcoxon> hey Lunar_Lander
[19:14] <Lunar_Lander> tomorrow is the flight, how do you feel?
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[19:18] <Lunar_Lander> if I may ask :)
[19:20] <jcoxon> i'm in quite a good position
[19:20] <jcoxon> :-)
[19:20] <jcoxon> the delay for a week has allowed me to iron out some issues
[19:21] <Lunar_Lander> cool
[19:21] <Lunar_Lander> like with the computer testing and so on?
[19:22] <jcoxon> tis my 12th flight
[19:22] <jcoxon> Lunar_Lander, yeah
[19:22] <Lunar_Lander> your 12th one already
[19:22] <Lunar_Lander> cool
[19:22] <Lunar_Lander> :)
[19:22] <Lunar_Lander> btw, the prediction website today said once "Max. float time is one day"
[19:23] <jcoxon> hmm thats new
[19:23] <Lunar_Lander> and when I corrected it, it said: "Server busy"
[19:23] <jcoxon> Lunar_Lander, i have my own copy of the predictor
[19:23] <jcoxon> adapted for float
[19:23] <Lunar_Lander> cool
[19:24] <Lunar_Lander> btw, in Experimental Physics 1 we had a homework exercise about a high-altitude balloon
[19:24] <jcoxon> ooo cool
[19:24] <Lunar_Lander> tasks were
[19:24] <Lunar_Lander> a) Determine the lift of the balloon on the ground
[19:24] <Lunar_Lander> b) Determine the pressure at which the balloon is fully inflated
[19:25] <Lunar_Lander> c) Determine the corresponding altitude
[19:25] <Lunar_Lander> d) What is the maximum altitude of this balloon?
[19:26] <Lunar_Lander> and the thing is, you know the barometric formula?
[19:26] <jcoxon> :-)
[19:26] <Randomskk> lol our examples paper
[19:27] <Lunar_Lander> p(h)=p0*exp(-(m*g*h)/(R*T))
[19:27] <Randomskk> "a weather balloon is filled with V helium, ..."
[19:27] <Randomskk> "Assuming the balloon's volume does not change during ascent, calculate the maximum altitude"
[19:27] <Lunar_Lander> ah
[19:27] <Randomskk> lol realism
[19:27] <Lunar_Lander> yeah, ours was partly inflated
[19:27] <Lunar_Lander> 500 m^3
[19:27] <Randomskk> and no, it wasn't a {zero,super}pressure balloon :P
[19:27] <Lunar_Lander> and max volume was like 900
[19:27] <Lunar_Lander> xD
[19:28] <Lunar_Lander> well
[19:28] <Lunar_Lander> I then got like 5.1 and 15.3 km
[19:28] <Lunar_Lander> and a friend of mine used the form of the equation from the lecture
[19:28] <Lunar_Lander> which had the R replaced with the Boltzmann constant
[19:29] <Lunar_Lander> 1.3*10^-23
[19:29] <Lunar_Lander> and he got altitudes like 1.54*10^-22 m
[19:29] <Randomskk> quite low
[19:30] <Lunar_Lander> yes
[19:30] <Lunar_Lander> and the thing was
[19:30] <jcoxon> Randomskk, you coming to the launch tomororw?
[19:30] <Lunar_Lander> if you use the formula with the Boltzmann constant, your "m" in the formula is not the molecular mass of air
[19:30] <Lunar_Lander> but something else
[19:31] <Randomskk> jcoxon: not sure, might be easier to stay here and track it - my parents are coming up until about 2ish
[19:31] <jcoxon> Randomskk, okay cool
[19:32] <jcoxon> wow we've got a danish ham using dl-fldigi
[19:33] <Randomskk> nice
[19:33] <jcoxon> not sure they'll get anything
[19:33] <jcoxon> its quite far :-)
[19:45] <Lunar_Lander> xD
[19:48] <jcoxon> hmmm i'm trying to decide if i'm ready to seal up the payload
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[19:49] <Hiena> ' evening!
[19:50] <Hiena> Did you saw the San Fransisco HAB launch?
[19:50] <Lunar_Lander> hello
[19:50] <jcoxon> Hiena, yeah
[19:50] <jcoxon> noisebridge
[19:50] <Randomskk> not sure they really planned that one out too well, but they did recover it so eh
[19:51] <Randomskk> otoh their new plans terrify me, e.g. letting a payload freefall w/o parachute so they can record descent ideo
[19:52] <Hiena> Well, at least it will make a good maketing material for the G1. ;)
[19:52] <Randomskk> :P yea
[19:53] <Lunar_Lander> is there a link?
[19:53] <Hiena> Also, i got a mixed feelings about they setup, too.
[19:54] <Hiena> http://dichro.blogspot.com/2010/02/declaring-weeks-advance-notice-of.html
[19:54] <Randomskk> yes
[19:54] <Randomskk> like aPRS using their radio's internal antenna, not even an external whip, let alone a yagi
[19:54] <Randomskk> APRS*
[19:54] <Randomskk> or like planning to put everythin in a box then fill it with expanding foam
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[19:55] <Lunar_Lander> thanks
[19:55] <Laurenceb> hi
[19:56] <Lunar_Lander> hi
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[19:57] <jcoxon> hmmmm should i use hand heaters tomorrow to
[19:57] <jcoxon> as its not really a test of the ballast tanks if they are heated
[19:58] <SpeedEvil> heaters for what?
[19:58] <SpeedEvil> unless the heaters are very well insulated - they won't last for long
[19:59] <jcoxon> i'm now worried about the grease in the motor
[19:59] <Randomskk> http://4.bp.blogspot.com/_mQpO_AWkyx4/S3DoYlLKKtI/AAAAAAAAAJU/MIFTI_iRNDs/s1152/IMG_7120.jpg
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[20:00] <SpeedEvil> ah
[20:00] <jcoxon> thats a brave approach
[20:00] <SpeedEvil> the motor is reasonably decoupled from the pump?
[20:00] <Randomskk> their plan was to fill that with expanding foam, jcoxon
[20:00] <Randomskk> but it "turned into a soggy mess"
[20:00] <jcoxon> SpeedEvil, in what way?
[20:00] <SpeedEvil> two part foam would work quite well
[20:01] <SpeedEvil> If the motor moves at all - the grease will dissipate energy - warming it
[20:01] <russss> heh, that's quite a lot of equipment value they had there.
[20:01] <russss> like 4x the payload cost than the stuff we usually laumch
[20:01] <Hiena> Yeah. Like when you have too much money to burn.
[20:02] <russss> they will learn, given time
[20:02] <SpeedEvil> Or get jailed for killing someone by dropping a payload on them.
[20:02] <Randomskk> although they seem to be doing their best to ignore advice on their mailing list :P
[20:02] <Randomskk> their new plan is that because their current whip-mounted-izontally w/o groundplane did so badly, they will try a dipole next time
[20:03] <Randomskk> instead of, say, a vertical with some radials or such
[20:03] <Randomskk> so now they are radiating half their energy into space :P
[20:03] <Lunar_Lander> xD
[20:03] <Lunar_Lander> like that spaceflight team from Denmark
[20:03] <russss> and they're probably using 10x the power of one of our payloads
[20:04] <russss> inelegant.
[20:04] <Randomskk> 10x?
[20:04] <Randomskk> it's like a 5W radio?
[20:04] <Lunar_Lander> they plan to launch a guy from Iceland on a rocket on a suborbital trajectory
[20:04] <Lunar_Lander> I wrote them an E-Mail
[20:04] <Lunar_Lander> never got an response
[20:04] <russss> It's a handheld so it's probably more powerful than 10mW...
[20:04] <Randomskk> russss: many times more powerful
[20:04] <Randomskk> probably something like three orders of magnitude :P
[20:05] <Randomskk> here we go, apparently it was 850mW then
[20:05] <Hiena> Talking about the money burning, the guys at the university wants to send me to meet the national head-honcho of the manned spaceflight training, because i babbled to much about the cyclic pressure feed rocket engine.
[20:06] <Randomskk> they specced their receivers as 5W which seems a little unusual :P
[20:06] <Randomskk> but regardless about a hundred times more transmit power :P
[20:06] <Hiena> Randomskk, it could be the sound power. ;)
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[20:12] <Lunar_Lander> I think their payload assembly is not very planned
[20:12] <rjharrison> jcoxon, boo
[20:15] <Hiena> Well, i'll be off freezing some peroxide.
[20:17] <SpeedEvil> why?
[20:17] <SpeedEvil> oh
[20:17] <SpeedEvil> do you want an address for someone doing 98% H2O2?
[20:18] <SpeedEvil> http://www.peroxidepropulsion.com/
[20:20] <Hiena> I'm on the budget, and has no permi. So the 60% grade will be enough for the tests.
[20:21] <Hiena> Also the Screwup fairy visited my still, so now i have a 200 USD worth broken glassware.
[20:23] <SpeedEvil> You are taking precautions against vapour phase detonations and stuff?
[20:24] <SpeedEvil> I.E. blast shields
[20:24] <SpeedEvil> LOX may be easier to get.
[20:24] <SpeedEvil> Though not of course to store
[20:28] <Hiena> Nah, in the cooler and the heater heat exchanger had a sharp corners between the feed tube an the outer housing. When i used at the last time, i cleaned the whole still and left outside, hanged to the wall. Somehow in these corner the water vapor stuck, condensed, freezed, and cracked the glass.
[20:28] <Hiena> So now i'm back to the ice topping method.
[20:46] <Lunar_Lander> good night!
[20:46] <Lunar_Lander> good luck tomorrow jcoxon
[20:46] <jcoxon> Lunar_Lander, thanks!
[20:46] <jcoxon> hope you'll be following
[20:46] <Lunar_Lander> if I'd had a radio sure
[20:47] <Lunar_Lander> but I'll come here
[20:47] <jcoxon> oh online http://spacenear.us/tracker :-)
[20:48] <Lunar_Lander> ah cool
[20:48] <Lunar_Lander> yeah I'll watch that
[20:48] <Lunar_Lander> :(
[20:48] <Lunar_Lander> :)
[20:49] <Twiner> jcoxon: Yeah, good luck. (:
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[20:57] <Lunar_Lander> good night :)
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[20:59] <rjharrison> Hi RocketBoy did the monies go down ok
[21:01] <RocketBoy> I'm doing that tomorrow - when I'm out there for the launch
[21:05] <rjharrison> Ooh cool your going to be on site then
[21:05] <rjharrison> Will be expecting a few updates then
[21:05] <RocketBoy> I normally go in for a quick chat over the last year and any changes for the forthcomming
[21:06] <RocketBoy> yeah - if I work out what wrong I may get my webcam online
[21:06] <rjharrison> Cool via ustream?
[21:06] <RocketBoy> yeah
[21:08] <rjharrison> Supurb do you have your string and I'll shove it in the tracker
[21:08] <rjharrison> http://www.ustream.tv/flash/live/1/281455
[21:08] <rjharrison> This is mine!
[21:09] <RocketBoy> my van has packed up (fuel pump) - so I'm just looking at the wind direction to see where it would be best to launch from on the site - without getting too muddy
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[21:09] <rjharrison> RocketBoy are you launching tomorrow or just helping out?
[21:09] <AlexBreton> ping jcoxon
[21:10] <rjharrison> BTW RocketBoy I have go some of these mcp4921 DACs
[21:10] <RocketBoy> http://www.ustream.tv/mybroadcasts/171987
[21:11] <RocketBoy> http://www.ustream.tv/mybroadcasts/1719879
[21:11] <rjharrison> I'm hoping to be able to drive the TX with these in a cleaner way than the PWM
[21:13] <rjharrison> sds
[21:16] <Hiena> Meh, 9% rise in one step... It will be a seriously sllllloooooowwww process.
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[21:18] <rjharrison> RocketBoy http://ww1.microchip.com/downloads/en/DeviceDoc/21897B.pdf
[21:19] <rjharrison> Be interested to know if you think that would be suitable as a sine wave genrator for hte TX
[21:22] <RocketBoy> I should think so - more that enough resolutiion
[21:23] <rjharrison> And the SPI will update the wave form quick enough I guess
[21:23] <rjharrison> Bit lost here
[21:25] <rjmunro> This may be a bit late, but if BallastHalo 4 goes straight from ascending to descending, without floating for a continuous period, will it dump ballast anyway?
[21:25] <RocketBoy> yeah
[21:26] <jcoxon> rjmunro, yes
[21:26] <rjmunro> I seem to remember that last time it didn't :-)
[21:26] <jcoxon> it has mode 3 which is descent dump
[21:27] <rjmunro> I didn't notice that on the wiki page. Will take another look.
[21:27] <jcoxon> its not :-p
[21:27] <jcoxon> havent' got round to documenting everything
[21:28] <rjmunro> I tried to borrow a radio to listen tomorrow, but my friend forgot to bring it with him :-(
[21:29] <jcoxon> oh well, can follow online :-)
[21:30] <AlexBreton> jcoxon, how's communication with french hams?
[21:31] <jcoxon> AlexBreton, yeah got a few people, google translate seems to work well
[21:31] <rjmunro> Looking at the predicted track we may want spanish hams as well ...
[21:31] <AlexBreton> hablas espanol?
[21:31] <jcoxon> got 2 definites
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[21:32] <rjharrison> jcoxon I can't see any new loggers on the map atm
[21:33] <rjharrison> Would be good if they got set up
[21:33] <jcoxon> hmmm its cause they aren't doing the lat/lon properly
[21:33] <jcoxon> see view.php
[21:34] <rjmunro> AlexBreton: Un poquito.
[21:35] <jcoxon> ooooo new feature of google maps lab - can have constant lat/lon for your pointer
[21:35] <AlexBreton> ich noicht
[21:35] <jcoxon> rjharrison, hmmmm i think something is up with te logger list
[21:35] <jcoxon> as there are new people with correct strings not being displayed
[21:38] G8GTZ (~4f47cc49@gateway/web/freenode/x-jbkxwyzasbzednyu) joined #highaltitude.
[21:38] <jcoxon> hi G8GTZ
[21:39] <G8GTZ> hi just checking this out - will try to track the Cambridge balloon tomorrow
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[21:41] <Twiner> jcoxon: What kind of liquid are you using as a ballast?
[21:41] <jcoxon> ethanol
[21:43] <Twiner> Ah. No woories about freezing dump tubes, then. (:
[21:43] <jcoxon> yeah, main fear is frozen motor
[21:43] <Twiner> -o, +r*
[21:43] <jcoxon> :-p
[21:43] <Twiner> Have you tested it in a freezer?
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[21:44] <jcoxon> it was a bit of a challenge fitting it in my tiny freezer
[21:44] <jcoxon> i got it as cold as possible
[21:44] <jcoxon> well fingers crossed :-p
[21:44] <JohnTed> I want to stabilize my camera (or payload), so my recorded footage isn't shakey.
[21:44] <JohnTed> Any articles on doing this?
[21:45] <JohnTed> I was going to custom make my own gyroscope or gimbaled or something.
[21:45] <Randomskk> should speak to edmoore :P
[21:45] <Randomskk> he's doing essentially that as his masters project for an engineering degree here
[21:46] <Randomskk> it sounds like you would be in for a world of pain
[21:46] <JohnTed> Randomskk: me?
[21:46] <Randomskk> yes
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[21:47] <JohnTed> Randomskk: Any white papers out there?
[21:47] <Twiner> jcoxon: perhaps you should implement a reversing algorithm, and blip the pump every minute or so. That will give you feedback if the pump turns. (:
[21:47] <RocketBoy> tis this working http://www.ustream.tv/broadcaster/1719879
[21:47] <Twiner> It will also keep the motor from freezing.
[21:49] <JohnTed> RocketBoy: Has anyone successfully done it?
[21:49] <Twiner> Rocketboy: Nope. I'm getting a login/signup-page.
[21:49] <RocketBoy> ah - ok i think i have given u the wrong link
[21:51] <Twiner> jcoxon: If you don't want to pump cold air into the ballast tank, or pressurizing it, then perhaps a ratcheting cluth plus two speed sensors would help. (Overengineering ftw!)
[21:51] <Twiner> (:
[21:52] <RocketBoy> http://www.ustream.tv/channel/xaben
[21:53] <jcoxon> Twiner, don't give me ideas now
[21:53] <jcoxon> :-p
[21:53] <jcoxon> tis too late
[21:53] <jcoxon> hehe feature freeze :-p
[21:53] <russss> it's a tricky one
[21:53] <Twiner> A Gravity-fed dump valve would solve all the theoretical mechanical problems, and create a whole new set of them.
[21:53] <russss> you really want a nice low-temperature freezer to test stuff in
[21:54] <Twiner> jcoxon: Hihih. Ya, you're prolly right.
[21:54] <RocketBoy> wow 6 viewers
[21:54] <jcoxon> Twiner, they are all good points - lets see how it goes - might need a BH5
[21:54] <russss> you could probably do that by haxing the thermostat on a normal freezer.
[21:54] <SpeedEvil> russss: naah
[21:54] <Twiner> jcoxon: It's never a good idea to implement new untested (and critical) features the night before. :P
[21:55] <SpeedEvil> russss: they go to ~-30 or so
[21:55] <SpeedEvil> maybe -35
[21:55] Action: SpeedEvil has a broken freezer-stat
[21:55] <jcoxon> Twiner, tell me about it
[21:55] <rjharrison> RocketBoy not working for mew
[21:55] <SpeedEvil> My freezer is currently plugged into a 15 min timer - on 1 hour, off 3
[21:55] <russss> what's the lowest internal temperature that's been seen on a balloon?
[21:55] <Twiner> RocketBoy: Yay. Picture! :)
[21:55] <russss> I guess an atlantic floater will get pretty cold. Unusually cold, even.
[21:55] <russss> more variables
[21:56] <jcoxon> russss, yes and no
[21:56] <jcoxon> looking at snox data it also got quite warm
[21:56] <jcoxon> flying a bit lower ~11km alt
[21:56] <russss> well yeah on average I guess
[21:56] <jcoxon> so its colder but also you get whole days of heating
[21:56] <RocketBoy> rjharrison: just turned it back on again
[21:57] <SpeedEvil> Oh my god! Is that! An Ice Cream Tub?
[21:57] <SpeedEvil> I can almost make out the flavour.
[21:57] <RocketBoy> yep
[21:57] <SpeedEvil> :)
[21:57] <RocketBoy> yum
[21:59] <RocketBoy> seems to be working then - I'll see if i can get it going tomorrow
[21:59] <SpeedEvil> yup
[21:59] <SpeedEvil> choppy here - but that's proably my broken net
[22:00] <RocketBoy> well it'll be via 3G tomorrow
[22:00] <rjharrison> http://www.robertharrison.org/tracker/map.php?height=900
[22:01] <rjharrison> I have you in there
[22:01] <jcoxon> huh?
[22:01] <jcoxon> i've just updated my lat/lon so it'll updated soon
[22:02] <jcoxon> and gps has a lock :-p
[22:05] <jcoxon> wish people had added their lat/lon
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[22:07] <rjharrison> http://maps.google.com/?q=http://www.robertharrison.org/listen/active_rx.php&t=p
[22:07] <rjharrison> You may like this jcoxon
[22:07] <rjharrison> This is the active loggers
[22:08] <rjharrison> Well active in the last hour
[22:08] <jcoxon> ooo cleaver
[22:08] <jcoxon> clever*
[22:09] <rjharrison> It give a better picture of who is active
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[22:09] <jcoxon> rjharrison, is there away of putting in those who are active but haven't entered the lat/lon?
[22:09] <jcoxon> just so we know
[22:12] <sbasuita> hah jcoxon the gps nazi ;P
[22:13] <jcoxon> but its much cooler when you can see them!
[22:15] <rjharrison> where are they
[22:15] <rjharrison> in the ZZ
[22:16] <jcoxon> yeah
[22:16] <jcoxon> it seems that you look for lat/lon, if its not there it doesn't get listed in loggers.php
[22:17] <rjharrison> http://www.robertharrison.org/listen/view.php?reg=/UNKNOWN/
[22:17] <rjharrison> Yep I'll see what I can do for you
[22:18] <jcoxon> thanks :-)
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[22:21] <Randomskk> yay, now I show up on the active listeners map
[22:26] <rjharrison> is f4fsd on here
[22:27] <rjharrison> ! on qrz
[22:27] <rjharrison> I have got the lat long for your german contact
[22:30] <rjharrison> jcoxon I'm going for this http://aprs.fi/?call=F4FSD-9
[22:30] <rjharrison> It's scary how colse you can get to people with their call sign
[22:32] <G8DSU> Wish I could really erect a mast that size in Twickenham! :-)
[22:34] <rjharrison> http://maps.google.com/?q=http://www.robertharrison.org/listen/receivers.php&t=p
[22:34] <rjharrison> Will that do you jcoxon
[22:34] <rjharrison> G8DSU That would be cool hey
[22:34] <rjharrison> Top band no problems
[22:38] <Randomskk> I'm still yet to pick anything up on HF :(
[22:38] <Randomskk> mostly the trawling through a big swathe of frequencies in the hope of finding something seems silly
[22:39] <Randomskk> also every time I get around to it it's nighttime
[22:40] <rjharrison> hf is really only active at night time
[22:40] <rjharrison> well most active
[22:40] <Randomskk> isn't evening generally better than night?
[22:40] <rjharrison> It bounces better at dusk a
[22:40] <rjharrison> But it's still active now
[22:41] <Randomskk> how do you go about finding anything then?
[22:41] <rjharrison> Randomskk do you have a long wire connected
[22:41] <Randomskk> yea
[22:42] <rjharrison> try 20 meteres
[22:42] <rjharrison> 14,125-14,300Mhz
[22:43] <rjharrison> on lsb
[22:43] <rjharrison> http://www.rsgb-spectrumforum.org.uk/bandplan.htm
[22:45] <Randomskk> nothing stands out as being distinct from noise
[22:46] <Randomskk> except for some weird tones that don't sound like they are encoding any data
[22:49] <rjharrison> Humm something is not right#
[22:49] <rjharrison> What rx are you using
[22:49] <rjharrison> radio
[22:49] <Randomskk> ic7000
[22:49] <Randomskk> there are quite a few random noises but they don't sound like data modes
[22:49] <rjharrison> Ooo yours or edmoors
[22:50] <Randomskk> mine
[22:50] <rjharrison> OOOOooo
[22:50] <rjharrison> Even nicer
[22:50] <Randomskk> it is pretty fun but so far I've just used it on vhf really
[22:50] <Randomskk> well and some 2m mainly aprs
[22:50] <rjharrison> Well it's a very good radio
[22:50] <Randomskk> I suspect my antenna is more the issue
[22:50] <rjharrison> Yep
[22:51] <Randomskk> it's about 20 or 30m long and drops vertical from my window to almost ground level
[22:51] <rjharrison> Humm that should do it
[22:51] <rjharrison> I assume it's not coax :)
[22:51] <Randomskk> nope
[22:51] <rjharrison> Just checking
[22:51] <Randomskk> no coax at all though, just that cable eventually plugged into the socket
[22:52] <rjharrison> I have done that and so has james
[22:52] <rjharrison> You may need to ground the radio though
[22:52] <rjharrison> ping jcoxon
[22:52] <rjharrison> Anyone would think he was busy :)
[22:52] <Randomskk> :P
[22:53] <Randomskk> yea, radio is not grounded though is running off mains supply
[22:53] <rjharrison> Ground the outside of the connector to a radiator if possible
[22:53] <rjharrison> the groud is better
[22:54] <rjharrison> ground is better (Cu rod in deep)
[22:54] <Randomskk> not much change to dig in a ground rod here
[22:54] <Randomskk> radiator might be doable
[22:54] <Randomskk> to ground of the antenna connector or to the radio's grounding point?
[22:56] <rjharrison> It's the same
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[22:58] <rjharrison> hey k=dk6wx is online
[22:58] <rjharrison> dk6wx
[23:00] juxta (fourtytwo@ppp121-45-84-224.lns20.adl6.internode.on.net) joined #highaltitude.
[23:00] <rjharrison> Hey juxta
[23:00] <rjharrison> Hows it going
[23:01] <juxta> morning rjharrison
[23:01] <rjharrison> You arround for launch tomorrow?
[23:01] <juxta> just got out of bed :)
[23:01] <juxta> yep I think so!
[23:01] <rjharrison> Just about to go to bed here
[23:01] <juxta> 1500UTC right?
[23:02] <rjharrison> Yep
[23:03] <juxta> alrighty
[23:03] <juxta> I've gotta dash, i'll be back here in a little while, catch up with you when you wake up :)
[23:03] <rjharrison> Yep sure
[23:05] <Randomskk> still nothing on 10m or 20m having grounded it, though some of those high pitched beeps almost sound like they are encoding something
[23:05] <Randomskk> I think I'm just hearing things though
[23:05] <Randomskk> certainly ho[B[B[Bcertainly nothing that sounds like CW or voice
[23:06] <Randomskk> hmmm something is turning on/off here
[23:07] <Randomskk> at a very very low frequency
[23:10] <rjharrison> Randomskk weird
[23:10] <Randomskk> another signal that is irregular but doesn't sound like any kind of data mode I've heard
[23:10] <Randomskk> or like any kind of sensible data in fact
[23:10] <Randomskk> still no voice or cw
[23:11] <SpeedEvil> hav eyou listened to the caps of the various modes in fldigi?
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[23:11] <Randomskk> jon and I spent ages just playing with fldigi's generation modes
[23:11] <Randomskk> combined with speakers and a microphone
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[23:15] <rjharrison> hey natrium42
[23:16] <natrium42> yellow
[23:16] <rjharrison> natrium42, active loggers http://maps.google.com/?q=http://www.robertharrison.org/listen/active_rx.php&t=p
[23:17] <rjharrison> You may want to shove that into the tracker rather than all the listeners ever
[23:17] <natrium42> ah, excellent
[23:21] <rjharrison> bed calls
[23:21] <rjharrison> nigths
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[23:36] <jcoxon> hey natrium42
[23:36] <natrium42> ohai
[23:36] <natrium42> all ready for tomorrow?
[23:37] <jcoxon> yeah
[23:38] <jcoxon> i'm just wondering that we should add a function that just 'turns' the motor every 20mins or so
[23:39] <jcoxon> to keep it warm
[23:40] <natrium42> good question :S
[23:47] <Twiner> Whops.
[23:48] <Twiner> Sorry, jcoxon. :P
[23:51] <jcoxon> sorry for what?
[23:51] <jcoxon> :-)
[23:54] <Twiner> For plnting that idea in your brain.
[23:55] <jcoxon> nah its been in mine mind for a while
[23:56] <jcoxon> should be quite easy to implement and easy to test
[00:00] --- Sat Feb 13 2010