highaltitude.log.20140325

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[02:40] <RaptorJesus> ok
[02:40] <RaptorJesus> so
[02:40] <RaptorJesus> I want to fill an aerostat with LSD and explode it over a crowd
[02:52] <g0pai_ian> On a Crimean military base?
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[05:22] <RaptorJesus> hey
[05:22] <RaptorJesus> you guys know that little kickstarter floaty bot
[05:22] <RaptorJesus> what's it called
[05:23] <RaptorJesus> https://www.kickstarter.com/projects/ziphius/ziphius-the-aquatic-drone
[05:23] <RaptorJesus> that thing
[05:23] <RaptorJesus> I want it to tow a surfboard with a solar panel on it
[05:24] <RaptorJesus> and throw some GSM on it
[05:24] <RaptorJesus> think that'll work?
[05:24] <RaptorJesus> oh and have it troll around in the pacific ocean taking pics
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[05:27] <saadzmirza> Hello!
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[05:29] <saadzmirza> Hello es5nch
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[05:33] <es5nhc> hi saadzmirza
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[06:53] <x-f> you can't be gone, you just came in!
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[07:01] <cm13g09> x-f: I took issue with this yesterday
[07:01] <x-f> i saw, it went unnoticed
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[07:01] <cm13g09> that IRC client seems to emit that every time it joins a channel and the user is set as away.....
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[07:43] <Oddstr13> RaptorJesus: GSM in the middle of the pacific ocean? doubt it
[07:44] <RaptorJesus> no
[07:44] <RaptorJesus> off shore
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[07:46] <daveake> I smell troll
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[07:58] <fsphil> morning fine peoples
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[08:02] <mfa298> moaning
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[08:18] <nosebleedkt2> :)
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[10:26] <WillDWork> Daveake - any more run-ins with Eduardo?!
[10:27] <daveake> No he seems to have gone quiet, and I've given up anyway
[10:27] <gonzo_> wasn't that a short lived crap 80's soap?
[10:27] <daveake> He seems to think the Upu and I are evil twins that hate Mexico
[10:27] <daveake> Eldorado? :)
[10:28] <gonzo_> that was it. I never saw it, but stumbled into them filming it
[10:30] <gonzo_> a family holiday in spain, we went to our usual cafe on the day we got there, sat down and waited for service. Then were told that it was closed for the morning, and all the 'customers' were actors
[10:30] <gonzo_> so we went next door and watched the goings on, over lunch
[10:30] <daveake> It's a shame, but if you simply ask him how he (allegedly) achieved 47.4km with helium, a standard latex balloon and a full-fat payload then you just get claims that you're in the Mafia and want to work for NASA
[10:31] <WillDWork> but the video showed it dave
[10:31] <WillDWork> :]
[10:31] <daveake> Riiiight
[10:31] <daveake> And 2000 people watched it so how can they be wrong?
[10:31] <daveake> Physics doesn't get a look in
[10:32] <daveake> Best guess from the available info is that the burst was at 33km
[10:32] <Laurenceb> heh i thought that flight looked suspicious
[10:32] <Laurenceb> no sign of M0XER-11 :-/
[10:33] <Laurenceb> but if its still airborne it will only have passed a single receiver so far
[10:33] <daveake> Laurenceb According to the telemetry it averaged over 10m/s ascent and peaked at 15m/s
[10:33] <daveake> Do the calcs on how much gas that needs, and he didn't have enough in those cylinders
[10:34] <Laurenceb> what the heck
[10:34] <Laurenceb> no way you could get that high at that ascent rate
[10:34] <daveake> Well quite. How high would you expect a 3.5kg payload under a 2kg balloon to get at 11m/s?
[10:34] <Darkside> im sure the rate show in the OSD is horizontal
[10:35] <daveake> Those figures are from the altitude reports
[10:35] <Geoff-G8DHE-M> Is it a Youtube video then ?
[10:35] <Darkside> oh ok
[10:35] <daveake> http://www.youtube.com/watch?v=D1FcWJclo6Y
[10:36] <daveake> I suggested (as you can see) that 47km would be pretty amazing even if it was a teeny payload and hydrogen, let alone a ton of lard and helium
[10:37] <Laurenceb> "Implementing a New World Record:"
[10:37] <Laurenceb> lol
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[10:41] <Laurenceb> he probably scaled the altitude or something
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[10:43] <daveake> It's an Ardupilot. Could be using pressure instead of GPS (though it does have a GPS allegedly with 13 sats)
[10:44] <daveake> ublox but I don't know if it's in flight mode or not
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[10:54] <Laurenceb> http://www.indiegogo.com/projects/tarc-the-first-free-energy-thought-magnifier
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[10:57] <Darkside> lol
[10:57] <Darkside> not sure if epic troll or legit
[10:57] <Darkside> well, serious
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[11:25] <daveake> "It is only limited by your imagination."
[11:25] <daveake> Well that's what it relies on. Imagination and stupidty and gullibility.
[11:26] <daveake> You have to imagine that it actually works
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[13:02] <malgar> I would like to search all the flights on habhub of 2 february 2014. Where should I search?
[13:03] <adamgreig> hmm
[13:03] <adamgreig> http://habitat.habhub.org/ept/ is the canonical place to get at flight data
[13:04] <adamgreig> you'll note every flight on the left box has a date
[13:04] <adamgreig> so if you find ones around 2 feb 2014
[13:04] <adamgreig> that'l probably do the trick
[13:04] <adamgreig> there are other ways that involve more effort from other people, depending on why you're trying to do this search
[13:04] <adamgreig> but all the data is publically available via the main database api, see http://habitat.readthedocs.org for more information
[13:07] <malgar> tnx
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[13:17] <fsphil> adamgreig: ept doesn't seem to export date at the moment
[13:17] <fsphil> might be useful for multi-day flights
[13:19] <mfa298> were there even any flights on 2nd feb ?
[13:19] <adamgreig> lol
[13:20] <adamgreig> fair point, ept only exports the data from the telemetry string
[13:21] <malgar> this launch used habhub predictor but it seems that they used an own tracking system http://www.youtube.com/watch?v=zC8bLtDZ6cw
[13:22] <mfa298> if you only want to know about flights the ical feed might give something, but you might need something that remembers the history from it
[13:22] <mfa298> looking at my google calendar it shows nothing on 2/2 (but some flights on 1/2)
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[13:23] <malgar> I think they used a gsm/sms tracking
[13:23] <fsphil> did they get it back?
[13:24] <malgar> fsphil: yes
[13:24] <fsphil> nice
[13:24] <malgar> and they got a lot of headlines on newspapers
[13:25] <malgar> http://www.independent.co.uk/news/science/sicilian-space-programme-amateur-scientists-send-pastry-into-space-video-9175818.html
[13:26] <malgar> http://www.reuters.com/article/2014/03/06/us-italy-pastry-idUSBREA2512X20140306
[13:27] <DL7AD> fire ballooooon :D http://imgur.com/gallery/Ock8msJ
[13:27] <mfa298> from the first couple of minutes of the youtube looks like they've done a good job - drop testing payload and chute, packing gafer tape
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[13:28] <malgar> lookhttp://www.youtube.com/watch?feature=player_detailpage&v=zC8bLtDZ6cw#t=200 look at the awful weather!!
[13:28] <malgar> :D
[13:29] <DL7AD> http://www.youtube.com/watch?feature=player_detailpage&v=zC8bLtDZ6cw#t=200
[13:35] <malgar> this shows that balloons are not so fragile
[13:35] <malgar> :P
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[13:38] <daveake> launch conditions seem rather familiar :/
[13:39] <malgar> :D
[13:45] <ibanezmatt13> :)
[13:50] <Laurenceb__> http://uk.farnell.com/STM32-NUCLEO-DEVELOPMENT-BOARD#lp-productRange
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[13:54] <mattbrejza> whatsup with those four rectangular pads in each corner of the stm32? :/
[13:55] <aadamson> Laurenceb__, FYI, if you use openocd with those, you will have to build the latest version, I have the 152 version and it doesn't work with the 0.7.0 release, I built a new 0.8.0dev yesterday and all is good again
[13:55] <aadamson> but for $10 (us) how can you go wrong
[13:56] <Laurenceb__> interesting
[13:56] <Laurenceb__> i just use texane st-link from github
[13:57] <aadamson> that's just the programmer, I use openocd as a gdb server for jtag debugging
[13:57] <fsphil> more cheap dev boards
[13:57] <aadamson> ah
[13:57] <aadamson> sorry
[13:57] <aadamson> yes, texane is indeed dgb
[13:57] <aadamson> gdb
[13:58] <aadamson> but I tried that early on and it was a bit limiting - can't remember why
[13:58] <aadamson> http://fabooh.com/2014/02/25/openocd-meets-a-nucleo-f030r8-board/ - fyi
[14:00] <Laurenceb__> thanks
[14:02] <aadamson> and I'll assume most know this, but while it's arduino compatible, it's only 3v3 powered. And *NOT* all pins on an STM32 are 5v tolerant, so you have to be careful just plugging in arduino shields that may have 5v coming from the shields, etc
[14:03] <Laurenceb__> yeah 5v into the adc will fry it
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[14:38] <amell> http://online.wsj.com/public/resources/documents/annex_03252014.pdf - excellent pdf file explaining how they worked out mh370 went south
[14:40] <adamgreig> amell: "excellent"?
[14:40] <amell> okay. better than normal newspaper explanations.
[14:40] <adamgreig> leaves more questions unanswered than it answers
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[14:41] <adamgreig> it's totally unclear how you go from that information to knowing north or south, especially given as for a geostationary satellite you'd expect that to be a symmetric case?
[14:41] <adamgreig> also I don't see what the ground station has to do with it, assuming the satellite does onboard processing
[14:41] <adamgreig> unless it's because we can work out the satellite velocity using the ground station measured doppler I guess
[14:42] <amell> It does state that at bottom of page 1.
[14:43] <mikestir> you wouldn't expect any significant doppler on the sat->ground path would you?
[14:43] <mikestir> it's GEO
[14:44] <adamgreig> mikestir: geosynchronous
[14:44] <adamgreig> it maintains a position over the earth within some control box
[14:44] <adamgreig> but it's not stationary
[14:44] <adamgreig> requires too much fuel to keep that up
[14:44] <adamgreig> esp for an old satellite
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[14:45] <adamgreig> if it had zero north-south velocity you couldn't differentiate between the plane being north or south
[14:45] <amell> personally I'm surprised that they know exactly what the BFO for each transmission is. Must be a lot of data...
[14:45] <mikestir> be interesting to know what sort of variation that was in comparison with oscillator tolerances throughout the system
[14:47] <adamgreig> amell: exactly
[14:47] <adamgreig> though I guess it's not outrageous to record the frequency of the ping in stationkeeping data
[14:48] <adamgreig> given as it'l be mixed with an LO at 1.5 or so and then presumably they do a code search in frequency space to find it
[14:48] <adamgreig> it certainly knows the frequency
[14:48] <adamgreig> you can estimate the doppler you'd expect to see for a plane with like 500mph relative velocity at 30o latitude and it's like 500Hz
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[14:50] <amell> difference between north and south is like 60-70 Hz at most.
[14:50] <adamgreig> yea probably
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[14:50] <adamgreig> it's not much!
[14:51] <amell> no. lot of error tolerance here... wondering if theres some statistics being done here too.
[14:52] <adamgreig> they did say they compared it to a lot of data from plane pings received on northern or southern routes
[14:52] <amell> okay, but comparing it to one plane? hmm. well, we are assured it has been peer reviewed.
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[14:56] <adamgreig> no, I mean they compared it to lots of data from lots of planes that had historically been flying on the north or south
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[14:58] <amell> I understand what you meant, that is one data set, the other data set is just MH370. there has to be statistical error in the mh370 data set.
[15:00] <adamgreig> right, yes
[15:00] <adamgreig> for sure. I guess they are confident it's sufficiently small.
[15:01] <adamgreig> it doesn't seem entirely unreasonable
[15:01] <adamgreig> maybe they know the doppler to within 10hz, that's not unimaginable
[15:01] <adamgreig> and you could easily imagine something like 70hz difference for north vs south routes, assuming a reasonable bound on plane velocity
[15:01] <mikestir> but you wouldn't expect the transmitter to be that stable
[15:01] <adamgreig> which would give you a pretty clear signal
[15:01] <mikestir> unless it's locked to gps or something, which I suppose isn't out of the question
[15:02] <adamgreig> mikestir: right, but if the same clock is used for satellite uplink and downlink, and you have other tracking data of satellite position, you might be able to know what the onboard clock was doing
[15:02] <adamgreig> the ground side clock could definitely be that accurate
[15:02] <adamgreig> the plane transmitter is likely the least accurate
[15:02] <adamgreig> but might be reasonably stable - not unreasonable for it to be PLL on a Rb standard or something, perhaps
[15:03] <adamgreig> and you can calibrate out static error because you have pings from when it was on the ground and when it had a known velocity, before ACARS went off
[15:03] <amell> Do we know which satellite it is?
[15:03] <adamgreig> yea
[15:03] <adamgreig> I forget the name, but it's public
[15:03] <amell> inmarsat
[15:03] <amell> just which one. looking it up.
[15:03] <mikestir> the service is called swift64
[15:04] <amell> http://www.inmarsat.com/service/swift-64/
[15:04] <amell> essentially isdn over sat.
[15:04] <mikestir> yeah. don't know what that uses in terms of air interface though
[15:05] <mikestir> it must be one of the more complicated schemes for them to have this kind of data
[15:09] <Laurenceb__> it might do AFC between the plane and sat
[15:13] <amell> Swift64 FREQUENCY
[15:13] <amell> Receive 1525.0 MHz to 1559.0 MHz Transmit 1626.5 MHz to 1660.5 MHz
[15:24] <db_g6gzh_> I wouldn't be surprised if the aircraft transmitter locked itself to the downlink frequency
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[15:30] <DL7AD_mobile> Good afternoon
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[15:38] <DL7AD_mobile> abc
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[16:16] <Laurenceb__> http://missteribabylonestar.com/
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[16:18] <Laurenceb__> seems to be made by this guy https://plus.google.com/+LordStevenChrist/posts
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[16:26] <nats`> is it a joke ?
[16:27] <Laurenceb__> dunno
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[16:28] <nats`> I hope so
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[16:31] Nick change: Geoff-G8DHE_ -> Geoff-G8DHE-M
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[16:31] <amell> Has B41 been declared lost yet?
[16:32] <Laurenceb__> it might just come in range still
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[16:32] <arko> amell: dont tell CNN
[16:32] <Laurenceb__> hardly any APRS where its going on prediction
[16:32] <amell> most likely scenario is envelop failure due to being buzzed by Iranian MiGs.
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[16:37] <nats`> amell ask lord Steven Christ to bring him back to life
[16:37] <Laurenceb__> how does a balloon fly in a concave earth?
[16:37] <nats`> it doesn't !
[16:38] <nats`> the earth fly around the sacred balloon
[16:38] <nats`> Bow down for the Balloon !
[16:38] <Laurenceb__> of course
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[16:43] <Laurenceb__> http://www.godlikeproductions.com/forum1/message2461758/pg1
[16:43] <Laurenceb__> lolz
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[16:48] <amell> lolz at LSC letter to the pope
[16:48] <amell> I command you to conceal not my identity and my message to the masses. For the time is short and judgment is at hand. You are to point them to me as the returned Christ. I expect a quick response from you confirming your obedience to me.
[16:49] <nats`> I'm hesitating between the schyzo/maniac or the totally insane guy
[16:49] <amell> totally insane no doubt
[16:50] <amell> Bit like the guy in Cambridge who goes shopping at my local asda in full SS uniform.
[16:51] <craag> amell: Was it you who was looking to do foundation amateur radio stuff?
[16:51] <amell> yeah, at some point this spring/summer
[16:51] <amell> zimmer avoidance strategy you see.
[16:51] <craag> Ok, LHS apparently have a few spare slots https://twitter.com/m0hsl/status/448224813073850368
[16:52] <craag> might be a bit easier to get to..
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[17:02] <amell> craag: thanks will look at that. I know someone there.
[17:08] <Laurenceb__> http://cdn.listcovery.com/wp-content/uploads/2013/08/fail-22.jpg
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[20:58] <DL7AD> evening :)
[20:58] <craag> good evening
[20:58] <Reb-SM3ULC> evening
[20:58] Lunar_Lander (~kevin@p5488BF67.dip0.t-ipconnect.de) joined #highaltitude.
[20:58] <craag> Evening Lunar_Lander
[20:59] <Lunar_Lander> evening
[20:59] <Lunar_Lander> let's waste no time, please have a look at this: https://www.youtube.com/watch?v=a123pP7rwJs
[21:00] <craag> blinky :D
[21:00] <Lunar_Lander> yeah :D
[21:00] <Reb-SM3ULC> wooooooooow
[21:00] <craag> so... ready to launch?
[21:00] <DL1SGP> *looks*
[21:00] <Lunar_Lander> not yet, GPS and radio still missing, but can be soldered in any time :)
[21:02] <Lunar_Lander> only thing is that for a change Farnell did not deliver the next day, so my flux pen did not arrive yet
[21:02] <Lunar_Lander> so I went downstairs and borrowed one from the electronics folks :)
[21:03] <Lunar_Lander> that was really easy I have to say
[21:03] <craag> I would say get it built up asap so you can start testing :)
[21:05] <Lunar_Lander> yeah :)
[21:05] <Lunar_Lander> number 2 will be built by my folks so that they get some SMD experience
[21:05] <aadamson> long as people are sharing - https://dl.dropboxusercontent.com/u/6730484/DSCN2438.JPG
[21:06] <aadamson> solar/pv controller - functional, 1 cell controller functional - stm32l1 board - non-functional - working on tonight :)
[21:06] <Lunar_Lander> cool
[21:06] <craag> usb?
[21:06] <Lunar_Lander> oshpark :)
[21:06] <aadamson> oh yeah and usb on the solar/pv board
[21:06] <aadamson> yes, usb and oshpark
[21:06] <Lunar_Lander> the microSD had a unwelcome surprise
[21:06] <craag> Whats the usb for?
[21:06] <fsphil> nice to see some arm being used, even if it is a bit overkill :)
[21:06] <aadamson> one needs to develop and having a vcp running on the stm will be useful
[21:07] <aadamson> fsphil, never over kill... I just can't bring myself to do yet another arduino widget
[21:07] <Lunar_Lander> I fluxed the pads, tacked it on the edge pin, then applied flux over the pins and wanted to do drag soldering
[21:07] <Lunar_Lander> the pins rotated the pins inside
[21:07] <fsphil> aadamson: there are arm-based arduinos too :)
[21:07] <aadamson> and have 256k flash will be helpful for some of thing things I want to do with it
[21:07] <Upu> to charge the lipo from craag at a guess
[21:07] <aadamson> yeah I happen to have done one of those too
[21:07] <Lunar_Lander> i.e. if the pin outside got tilted, the ones in the holder also turned
[21:08] <Upu> I've seen that mezzaine design some place before :)
[21:08] <Lunar_Lander> but I got that back aligned
[21:08] <Lunar_Lander> aadamson, yeah the Arduino Due :)
[21:08] <aadamson> fsphil, - https://dl.dropboxusercontent.com/u/6730484/STM32%20MiniF3.JPG
[21:08] <aadamson> stm32 f303
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[21:08] <aadamson> completely pro-mini pin/footprint/feature compatible
[21:08] <craag> Upu: Thought it might be, got one on the ukhasnet boards for the same reason :)
[21:08] <craag> Just wondering if it was something cleverer
[21:08] <fsphil> hey that's cute
[21:09] <Lunar_Lander> btw I did another fail
[21:09] <fsphil> aadamson: the edge of that pcb is tinned?
[21:09] <aadamson> It started life as an f103, but for the same price it can be an F303 with hwfp, 256kflash, 40k ram :)
[21:09] <aadamson> which the mini
[21:09] <Lunar_Lander> my silkscreen says IRF7470, but that MOSFETs threshold voltage is higher than 3.3V
[21:09] <Lunar_Lander> xD
[21:09] <aadamson> no, it's just where I soldered the headers
[21:09] <Lunar_Lander> so I am using one from Toshiba now that works
[21:10] <fsphil> it looks shiny in that picture
[21:10] <fsphil> it may actually be a bit transparent
[21:10] <aadamson> oshpark board an enig finished and I forgot to *tent* the vias when I did those gerbers :)
[21:10] <Lunar_Lander> aadamson, these things on the PCB edge, are they from the manufacturing process?
[21:10] <SP9UOB-Tom> evening
[21:10] <aadamson> ah, that's just the FR4
[21:10] <Lunar_Lander> these four lines that are packed
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[21:10] <Lunar_Lander> and repeat
[21:11] <aadamson> Lunar_Lander, what things?
[21:11] <Lunar_Lander> hmm on the middle board for example, next to R3
[21:11] <aadamson> on the new boards
[21:11] <Lunar_Lander> you see there are packs of four lines which repeat around the edge
[21:11] <Lunar_Lander> yea
[21:11] <aadamson> those are the drills for the break away tabs
[21:12] <Lunar_Lander> or on the top board to the lower left of C7
[21:12] <Lunar_Lander> ah
[21:12] <aadamson> they route everything except for that small 5-8mm length of board, then drill holes so you can snap them off
[21:12] <aadamson> I sometimes clean those up, but didn't this time
[21:13] <aadamson> Those are all 1.6mm boards, I'm going to do the actual run in .8mm if I can..
[21:13] <aadamson> to save some weight
[21:13] <aadamson> don't really need the 1.6mm
[21:14] <Lunar_Lander> ah
[21:14] <aadamson> I added load switches on all the voltage sources so that I can turn on and off the ADC sample draw if I want to ultra conserve power
[21:14] <Lunar_Lander> how much did it cost?
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[21:14] <aadamson> those boards?
[21:14] <aadamson> I'm in the US so it's really cheap... the power boards were like $2-3 for 3
[21:15] <aadamson> the stm32 board was a little more than that
[21:15] <aadamson> for prototype stuff, I've found no cheaper than oshpark, but he probably doesn't work very well for you in the EU
[21:16] <Lunar_Lander> ah
[21:17] <aadamson> I already know I need to change a couple of small things... nothing dramatic, just enhancements that I know I'll make so I didn't want to commit to a hackvana, or itead board
[21:17] <aadamson> plus I know I want .8mm when finished
[21:18] <amell> OOI how much does hackvana board cost - typical board for a pico payload?
[21:18] <aadamson> for example, I put the usb components on the main processor board, and I've since moved them to the usb/pv/lipo board, they will only be stuffed when needed
[21:19] <aadamson> I'm also going to add the solder footprint for the wires to both the top and bottom and put vias between the 2 so that the pads can't get ripped of
[21:19] <aadamson> just having a square to solder too is asking for it to be ripped off at some point :)
[21:19] <Lunar_Lander> amell, I think he has to calculate quotes depending on exact board size and the parameters you want
[21:20] <amell> okay, but £20 or £80 - rough order of magnitude?
[21:21] <Lunar_Lander> rather £20
[21:21] <Lunar_Lander> definately
[21:21] <LeoBodnar> £20 and £80 is the same order of magnitude
[21:21] <amell> affordable then :)
[21:21] <amell> Leobodnar: define magnitude ;)
[21:21] <Lunar_Lander> I had to pay some $36 including p&p
[21:21] <LeoBodnar> log10()
[21:21] <Lunar_Lander> (and paypal fee that he charges)
[21:22] <Lunar_Lander> and that was for 10 boards
[21:22] <LeoBodnar> *order of magnitude is log10(a)
[21:22] <amell> says Leobodnar
[21:22] <Lunar_Lander> yea I think he means that order of magnitude is like comparing 20 to 200 or so
[21:23] <Lunar_Lander> in the usual sense of the expression
[21:23] <Lunar_Lander> but I understood what you meant :)
[21:23] <amell> Lunar_Lander: Thank you!
[21:23] <Lunar_Lander> you're welcome xD
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[21:33] <amell> Has B41 officially been declared lost yet?
[21:35] <Upu> well its in a no APRS zonr
[21:35] <Upu> zone
[21:37] <amell> any recent jetstream models - wondering if its the same as predicted when B41 entered Iran
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[21:45] <amell> strangely, cant find a UK source for aircell 7 cable.
[21:45] <enkidu> hello :> still spamming space?
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[21:46] <Upu> you probably don't need that
[21:46] <Upu> Westflex 103 is good
[21:46] <Upu> hi enkidu
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[21:49] <mfa298> amell: first hit on google (at least for me) http://www.nevadaradio.co.uk/cables-leads-plugs/antenna-cable/ssb-electronic-aircell-7---drum although currently sold out so you might need to call them
[21:49] <mfa298> although rg213 or Westflex 103 would probably do you as well
[21:50] <SP9UOB-Tom> evening Upu, i've drop You an email
[21:50] <Upu> yeah just looking
[21:51] <mfa298> westflex 103 might actually be slightly lower loss than Aircell 7 at 434MHz and it's cheaper !
[21:51] <Upu> you're getting ambitions Tom :)
[21:51] <Upu> Alaska ? :)
[21:51] <amell> 7.5db/432Mhz - not bad.
[21:51] <SP9UOB-Tom> mfa298: http://www.signalcontrol.com/products/andrew/Andrew_LDF450A_Half_Inch_Coax_Cable.pdf
[21:52] <SP9UOB-Tom> Upu: i've allmost been there ;-)
[21:52] <amell> damn, look at that metal core. i bet it is stiff.
[21:52] <Upu> thanks
[21:53] <Upu> Westflex is a nightmare to solder
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[21:53] <SP9UOB-Tom> Upu:please take a look at the database searching - its more flexible than Yours :-)
[21:53] <Upu> but it flexes enough I use it on my rotator
[21:53] <Upu> I will thanks Tom
[21:53] <Upu> cheers for sharing it
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[21:54] <SP9UOB-Tom> Upu: no problem
[21:54] <mfa298> agreed on westflex being a nightmare to solder. I trashed one centre pin trying to solder it on.
[21:54] <amell> 2.62mm copper? yow. I will need a blowtorch to solder it.
[21:54] <Upu> I used 2 irons :)
[21:55] <Upu> at the same time
[21:55] <SP9UOB-Tom> amell: use clamped connectors
[21:55] <daveake> ha
[21:55] <amell> I will treat it as a plumbing job
[21:56] <mfa298> amell: I think that's how I trashed one of the pins (with the flame option on a gas soldering iron.
[21:56] <amell> strangely westflex is better than ecoflex 10. and cheaper
[21:56] <Upu> tbh just stick with RG213 for the moment amell
[21:57] <amell> Upu: its only 2 quid more, and 2db less loss.
[21:57] <mfa298> you need to heat the joint really quickly and for a very short period of time and still do a good electrical joint. Otherwise you melt lots of the dialectric in the coax.
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[21:58] <Upu> yeah but when you are sat there crying with solder every where and a pile of knackered N-Plugs ....
[21:58] <enkidu> amateurs. 120W soldering station is more than enough ;)
[21:58] <qyx_> totally common stuff :)
[21:58] <enkidu> however, you cannot do it "proper way"
[21:58] <daveake> I've soldered 213; anything larger I'd want to crimp
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[22:00] <mfa298> I still want to know if anyone's tried to see if they can crimp and sma for the radio exam rather than the standard solder a pl259 onto rg58
[22:00] <enkidu> first, you want to put some flux on pcb and wire, then make a drop of tin on soldering iron and put it melted on place
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[22:04] <amell> why cant i just crimp the centre pin on?
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[22:05] <mfa298> you could try but you'll need to find a suitable sized crimp tool and they're not really designed for crimping so you might find it doesn't work (pin splits or doesn't fit into the rest of the casing)
[22:07] <mfa298> although I'd probably just go with rg213, it's much easier to work with (I've used both)
[22:07] <Upu> +1 for the 2132
[22:07] <Upu> -2
[22:07] <amell> 213 is more loss
[22:08] <amell> u or "?
[22:08] <amell> 15dB /100m !
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[22:09] <Upu> how long is the run ?
[22:10] <mfa298> but rg213 is much easier to work with and costs less. I'd probably spend the money saved on getting a Funcube Pro+ instead of the rtl-sdr.
[22:11] <Upu> yep
[22:11] <Upu> that
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[22:20] <amell> 25m run
[22:20] <amell> i think& its got some ups and downs&.
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[22:24] <craag> At 25m it's worth thinking whether you can put the receiver closer.
[22:25] <mfa298> so just over 3dB loss for rg213, that's not too bad (about half the power is lost in the antenna) you're antenna should have some gain (probably 5-7dB for 70cm) so there's a net gain. + it's in a better location than your magmount.
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[22:30] <Lunar_Lander> xD https://pbs.twimg.com/media/BjmxLDQCIAAtvfr.jpg
[22:33] <LeoBodnar> is Roger Rabbit an aviation expert?
[22:34] <Lunar_Lander> xD good question
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[22:40] <Lunar_Lander> xD https://pbs.twimg.com/media/BjMpkVnCEAAAeMN.jpg:large
[22:52] <aadamson> I don't know what the brands, types, etc are over your way, but if looking for uhf flexible coax it's either LMR-400 or Belden 9913, there are some *off brands over here* that are close specs to both of those all of these are 2.7db loss per 100'
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[22:57] <SP3OSJ> # habhub
[22:57] <SP3OSJ> #habhub
[22:58] <daveake> /join
[22:59] <Upu> :)
[23:00] <amell> couldnt believe that someone dropped a satellite :) seems its true& http://www.universetoday.com/24599/satellite-that-went-splat-now-ready-for-liftoff/
[23:03] <LeoBodnar> it's a very old story
[23:03] <Lunar_Lander> yeah
[23:03] <aadamson> like 2003/4
[23:04] <aadamson> and it cost some really big corp profits :)
[23:04] <amell> September 6th 2003 actually.
[23:04] <Lunar_Lander> just researched it, someone on stackexchange had the question if that was real, and then somone linked the NASA mishap board final report: http://www.nasa.gov/pdf/65776main_noaa_np_mishap.pdf
[23:04] <LeoBodnar> is researched == googled?
[23:05] <amell> Google is my research partner
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[23:06] <Lunar_Lander> yea in that case I googled it
[23:06] <amell> There was speculation that because the employee was retired, he may not have exercised objective oversight
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[23:14] <DL7AD_mobile> Evening
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[23:21] <Laurenceb> http://en.wikipedia.org/wiki/Professor_Elemental
[23:21] <Laurenceb> what the heck
[23:22] <amell> "chap hop"  hip-hop delivered in a Received Pronunciation accent
[23:22] <DL7AD_mobile> ^^
[23:22] <amell> lol
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[00:00] --- Wed Mar 26 2014