highaltitude.log.20160519

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[04:09] <SpacenearUS> New vehicle on the map: 03VK2HAB-11 - 12http://tracker.habhub.org/#!qm=All&q=VK2HAB-11
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[06:39] <tweetBot> @jamescoxon: Planning a #UKHASnet high alt balloon from Suffolk, UK on Sat 21/5 - aiming to float so dust off those nodes and join the network! #ukhas
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[07:31] <AndyEsser> morning
[07:31] <fsphil> morn'
[07:40] <daveake> m
[07:41] <AndyEsser> wow, 7 letters down to 1 in 3 lines
[07:41] <AndyEsser> we are lazy :P
[07:41] <fsphil>
[07:41] <AndyEsser> ha
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[07:46] <Vaizki_> I grunted semi-approvingly but didn't bother to type anything
[07:47] <AndyEsser> we know you care :)
[07:47] <Vaizki_> my campaign of misinformation is clearly sticking
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[08:12] <tweetBot> @AmsatUK: #UKHASnet Balloon Launch Saturday https://t.co/b1TeJqUK1F #amsat #hamradio #hamr https://t.co/M1vOEDJphO
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[08:16] <mfa298> I feel that fsphil's line should have had a "(This line left intentionally blank)" statement on it for full effect.
[08:16] <AndyEsser> :)
[08:16] <fsphil> or a t-shirt, "this brain intentionally left blank"
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[08:22] <x-f> i often get spam emails with "This message has no content." content
[08:31] <fsphil> ebay sends emails with a blank text part, very annoying
[08:31] <fsphil> I have my client set to view text by default
[08:35] <AndyEsser> bad fsphil
[08:38] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12http://tracker.habhub.org/#!qm=All&q=CALLSIGN123_chase
[09:11] <AndyEsser> still no email from RW :(
[09:11] <AndyEsser> looks unlikely I'll have the antenna for the weekend :(
[09:12] <daveake> call them?
[09:12] <AndyEsser> yea, might have to do that at lunchtime :(
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[09:15] <mfa298> as they're the ones you paid I think Trading standards would tell you that's where the contract you setup by buying the stuff lies so it's they're responsibility to fix.
[09:15] <mfa298> even if the fault lies with UPS
[09:15] <AndyEsser> O yea, agreed
[09:15] <AndyEsser> I'm not UPS customer, tey are
[09:15] <AndyEsser> they*
[09:15] <mfa298> (they're the ones with the contract with UPS)
[09:15] <AndyEsser> so the onus should be on them anyway
[09:16] <AndyEsser> just don't want to order another antenna, just for them to go "Nah we're not going to do anything about it" and be out like £70
[09:16] <mfa298> it's always the useful bit to remember if/when they try and fob you off onto UPS or want you to do the work showing it was them that did the damage
[09:16] <AndyEsser> Yea
[09:17] <AndyEsser> the X50 is out of stock now anyway :(
[09:18] <AndyEsser> haha
[09:19] <AndyEsser> just read a review of the X50
[09:19] <AndyEsser> "it makes the design virtually bombproof"
[09:19] <AndyEsser> "this thing just won't break or fall apart"
[09:20] <Darkside> heh
[09:20] <Darkside> i've had one for years
[09:20] <Darkside> i used it mainly for field days, so its been knocked around quite a bit
[09:20] <Darkside> still works
[09:22] <mfa298> so bomb proof until you put it inside a cardboard box.
[09:23] <AndyEsser> mfa298: not sure the cardboard box is the cause of the issue here ;)
[09:24] <gonzo__> so bomb proof until you put it in 'the hands of couriers'
[09:25] <gonzo__> one job we had a load of lead castings, that stacked together to make a shield for radiation monitors
[09:26] <gonzo__> somehow the courier managed to beat them all up. Smashed wooden crates and castings distorted
[09:27] <gonzo__> not quite sure how they actaully managed it. And not just to one box, they managed 6-7 of them
[09:27] <mfa298> I was assuming the cardboard had magical properties meaning things inside become more fragil than the courier thinks.
[09:27] <AndyEsser> ah
[09:27] <mfa298> or maybe someone saw the same review and wanted to put it to the test
[09:28] <gonzo__> I think the courier's issuranec got hit for a 6fig sum on that one
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[09:31] <gonzo__> last time I had to go to collect somethjing from one of these budget couriers depots, I saw them unloading boxes off the back of a wagon, with a broom. All falling about 4ft
[09:31] <SIbot> In real units: 4 ft = 1.22 m
[09:31] <gonzo__> I was waiting for that!
[09:31] <gonzo__> something is afoot
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[09:33] <fsphil> 500 miles
[09:33] <fsphil> huh, sibot is a proclaimers fan
[09:33] <AndyEsser> ha
[09:33] <AndyEsser> 500miles
[09:34] <daveake> Does it convert "letter from America" to A4 then ?
[09:34] <daveake> no
[09:36] <gonzo__> it will for but not furlong
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[10:31] <tweetBot> @G7IGB: Probable UKHASnet launch May 21/22: James Coxon M6JCX reports he is hoping... https://t.co/zCIrH6p7Qk #hamradio #ukhas
[10:31] <fsphil> high altitude, high frequency
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[10:35] <AndyEsser> Spoke to RW now
[10:35] <AndyEsser> the person I'd emailed is on holiday (who only has one person checking a sales@ email address?!)
[10:35] <fsphil> hah
[10:36] <AndyEsser> they're going to see if they can get replacement from supplier for tomorrow
[10:36] <AndyEsser> and then either ship it next day for Saturday or I can drive down and pick it up and give them the replacment
[10:36] Action: AndyEsser checks flight calendar
[10:36] <fsphil> hopefully the supplier has uk stock, they're made in japan
[10:36] <AndyEsser> Yea, I'm not driving to Japan :P
[10:37] <fsphil> would be a fun trip
[10:39] <AndyEsser> friend of mine is off to Japan next week
[10:39] <fsphil> it's on my list of countries I'd like to visit
[10:39] <AndyEsser> I'd like to visit "old japan"
[10:39] <AndyEsser> modern Tokyo etc holds no interest for me
[10:39] <fsphil> but I'm a bit chicken, have never stayed in a country where the main lanaguage wasn't english
[10:39] <AndyEsser> fair enough
[10:40] <AndyEsser> I haven't done any decent travelling for years :(
[10:40] <AndyEsser> used to travel monthly for work, and have lived abroad many times before
[10:41] <edmoore> you could go to america
[10:41] <edmoore> they don't speak english there
[10:41] <edmoore> AndyEsser: didn't you like in malawi for a bit?
[10:41] <AndyEsser> nah, visited twice - very nearly moved there
[10:41] <AndyEsser> but my dad bought the shop in Godstone instead
[10:42] <gonzo__> I applied for a research support job in malawi when I graduated
[10:43] <AndyEsser> once I've made my millions, Malawi is where I'll build a rocket launch site ;)
[10:43] <gonzo__> you'd best stay out of b'ham fsphil
[10:43] <AndyEsser> or Manchester/Liverpool
[10:43] <fsphil> hah
[10:44] <fsphil> I stayed with family on the south coast one time, and one of their friends was from somewhere "up north". I couldn't understand a word he said
[10:44] <AndyEsser> haha
[10:44] <AndyEsser> o0o0o
[10:44] <AndyEsser> just seen RW's number appear on the phones calling in
[10:44] <fsphil> it was just so quick
[10:44] Action: AndyEsser waits for call to be transferred
[10:44] Action: AndyEsser glares at thought of the incompetent telesales team
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[10:48] <persamo> Goodmorning
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[10:49] <fsphil> howdy
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[10:56] <gonzo__> was in a hotel just outside newcastle. one guy was chatting with the girl at reception whilst the rest of us were filling in the forms etc
[10:57] <gonzo__> one of the lads asked ho he was talking english and she was talking foreign, but they bothe understood eachother
[10:58] <gonzo__> we had to explain it was a geordie accent
[10:59] <gonzo__> (the girl corrected us, thatit wasn't geordie, 'Worrr, Ah dinna speak geordie. Geordie is ten miles down the roooord')
[11:00] <AndyEsser> lol
[11:00] <fsphil> hah
[11:00] <fsphil> there are people from very nearby me that I have trouble understanding
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[11:07] <lz1dev> right next to you?
[11:09] <fsphil> in this very office
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[11:30] <PE2BZ> !flights
[11:30] <SpacenearUS> 03PE2BZ: Current flights: 03Barc 10(3116), 03UBSEDS15 434.600 CONTESTIA 16/1000 10(d812)
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[11:57] <SpacenearUS> New position from 03SQ5RZP-11 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=SQ5RZP-11
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[12:28] <SpacenearUS> New position from 03BARC after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=BARC
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[12:40] <fsphil> BBC NI may have out-punned us: http://www.bbc.co.uk/news/uk-northern-ireland-36329711
[12:41] <AndyEsser> ha
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[12:48] <gonzo__> but on the udder hand.....
[12:49] <daveake> they did that one
[12:49] <gonzo__> hmm, I cud have read more carefully
[12:59] <PE2BZ> Not the time for jokes about the cow boys ...
[13:06] <gonzo__> I herd that! (They didn't do that one.)
[13:07] <gonzo__> I will run and hide now
[13:09] <swaledale> afternoon
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[13:10] <swaledale> andyesser: got a replacement X50 yet?
[13:10] <AndyEsser> nope!
[13:10] <AndyEsser> should be driving down and picking one up on Saturday morning
[13:10] <swaledale> can you order from elsewhere and just get a refund from RW? is that not quicker?
[13:11] <AndyEsser> that's a bit more faff - this way it's just a simple switch
[13:13] <swaledale> guess it depends where they/you are
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[13:36] <daveake> swaledale: I have a fix for the broken Raspbian update
[13:36] <SpacenearUS> New vehicle on the map: 03K4TLH-11 - 12http://tracker.habhub.org/#!qm=All&q=K4TLH-11
[13:37] <daveake> 1 - Enable getty/debug to the serial port via raspi-config
[13:37] <AndyEsser> swaledale: only an 1.5 drive so not far
[13:37] <daveake> 2 - Disable getty (once only, not every boot) with systemctl mask serial-getty@ttyAMA0.service
[13:38] <daveake> That's it
[13:39] <SpacenearUS> New vehicle on the map: 03KD4MOJ-11 - 12http://tracker.habhub.org/#!qm=All&q=KD4MOJ-11
[13:55] <swaledale> daveake: ah thats cool! I saw you'd updated the instructions on not doing a apt-get upgrade
[13:55] <daveake> yeah
[13:56] <daveake> I'll change that again and add his. Seems like a raspi-config bug
[13:56] <swaledale> ok, i've got latest build without update on a tracker here, so can give it a whirl later
[13:57] <swaledale> the raspbian community should be made to fix their error!
[13:59] <swaledale> btw the zero boards look neat, i have a zero here looking lonely! :)
[14:04] <mfa298> swaledale: from what I've seen in the forum some of the bugs are being looked at.
[14:04] <mfa298> it sounds a bit like some of the firmware isn't happy with certain (kingston) SD cards.
[14:04] <mattbrejza> something something just use a microcontroller...
[14:04] <mfa298> at least in terms of apt-get breaking stuff
[14:06] <mfa298> you only get to complain fully if you've never made any mistakes in any code / hardware :p
[14:07] <daveake> Quite agree with microcontroller vs something with an OS, especially an OS that keeps changing.
[14:07] <PE2BZ> mfa298 do you know about a problem of Pi´s and SD cards ? I have a Pi with a Kingston SD card (Domoticz image) which I have to repair or re-install about every 2 or 3 weeks. Any links on that topic ?
[14:07] <jakeio> I'm still working on fixing my GPS to go into airborne mode. Might have sorted it. I need to check, does this look like the correct acknowledgement packet?
[14:07] <jakeio> 0xb5 0x62 0x5 0x1 0x2 0x0 0x6 0x24 0x32 0x5b
[14:07] <SpeedEvil> PE2BZ: SD cards are shit.
[14:07] <jakeio> Just going to look it up myself.
[14:07] <daveake> I think I've probably wasted, er, spent ~8 hours the last year or so fixing things that got broken (serial port changes, sounds driver changes, bootup changes)
[14:08] <SpeedEvil> PE2BZ: They are basically SSDs, with a controller that must fit in .1mm*5mm*15mm, and cost $.5
[14:08] <mfa298> PE2BZ: I think this is a recent thing with the may update to Jessie
[14:08] <zyp> PE2BZ, unsafe shutdown?
[14:08] <daveake> jakeio You have to go by the bible, aka command reference
[14:08] <mattbrejza> although using an OS with a microcontroller is often a good idea
[14:08] <SpeedEvil> PE2BZ: hence it's typically bad, and has significant issues from recovering from off nominal conditions in the block emulation.
[14:08] <PE2BZ> mfa298 indeed Jessie....
[14:08] <jakeio> I'm sifting through it now daveake.
[14:09] <SpeedEvil> PE2BZ: 30s at least after the last write before power-down is a good idea.
[14:09] <jakeio> I must say, control+f is my friend in these colossal manuals.
[14:09] <daveake> It'll be just after the bit where you read the command to send to it :)
[14:09] <jakeio> Oh really...
[14:09] <PE2BZ> zyp no, Domoticz should run 24/7 . But after days SSH does no longer work, Webmin gives an error with a lot of unreadable characters and then some days later Domoticz no longer responds.
[14:09] Action: jakeio facepalms
[14:10] <PE2BZ> Speedevil would it be possible to connect an SSD to the SD card connector ?
[14:11] <mfa298> PE2BZ: I think the recent stuff is signicantly broken in the latest firmware, as in doing apt-get upgrade breaks it, browse through the raspberry Pi forums if you want the detaisl.
[14:11] <SpeedEvil> PE2BZ: 'no'
[14:11] <PE2BZ> mfa298 I will give it a look. I use to run apt-get update and upgrade quite regularly
[14:12] <jakeio> It's the acknowledgement packet!
[14:12] <SpeedEvil> PE2BZ: It is technically possible to make an adaptor, I don't think anyone has. I have had good results with decent SD cards.
[14:12] <mfa298> PE2BZ: however if you've been having issues for a while then that's probably different to the recent stuff, maybe get a new SD card (and also check the PSU)
[14:12] <SpeedEvil> https://www.amazon.co.uk/Samsung-MicroSDXC-Adapter-Frustration-Packaging/dp/B00WIMBZHK/ref=dp_ob_title_ce - for example
[14:12] <PE2BZ> SpeedEvil: Can you recommend a brand ?
[14:13] <SpeedEvil> and yes - PSU is first port of call to check
[14:13] <PE2BZ> SpeedEvil that was a speedy reply ;-)
[14:13] <SpeedEvil> https://www.amazon.co.uk/SanDisk-Android-microSDXC-Frustration-Packaging/dp/B013UDL58E/ref=pd_vtph_147_tr_t_2?ie=UTF8&refRID=G8HBPBG3QYWCN6ASYSFV also worked well for me
[14:14] <PE2BZ> Thanks. I do not suspect the power supply. It is charging a 10.000 mAh powerpack, which is feeding the Pi.
[14:16] <PE2BZ> And now back to the RF part, could anyone advise what to use these days to convert (RX only) 400 - 406 MHz down to somewhere in the 0 - 30 MHz range ? I ¨need¨ the complete 6 MHz range (for the to arrive KiwiSDR, I want it to receive radiosonde band)
[14:20] <swaledale> pretty sure they could have fit a full size camera port on the pi zero. excuse to sell converter ribbon cable is the synical view! :)
[14:23] <gonzo__> if you have an old ICR7000, the IF out on that was wide, to use with a video rx module
[14:24] <gonzo__> or just knock up a converter
[14:26] <gonzo__> minikits minikits osc and a DBM
[14:26] <gonzo__> (they do a 500-600MHz osc-multi kit, but you can bypas the last 2x stage)
[14:27] <PE2BZ> Thanks gonzo__ I will give it a look.
[14:29] <gonzo__> you would need to sort out an lna/filter. But a habamp with a different saw filter may be the easiest way
[14:31] <PE2BZ> gonzo__ Indeed, but the habamps have the LNA at the output. With my antenna height of 27 meter and local TX on 428 MHz, 390 MHz, 169 MHz and UMTS and GSM I need the SAW at the input. I was offered to buy 2 habamps, one with the LNA bypassed, but in the end I would like to ¨serve´ both the 400 - 406 and 433 - 436 with one KiwiSDR. I guess it will make it a bit expensive.
[14:32] <PE2BZ> afk for a while.
[14:35] <gonzo__> modern lna mmics have such a high dynamic range, you can get away with strong local signals without getting overload (within reason)
[14:37] <gonzo__> some of the local sigs you could stub out, but the 428MHz could eb an issue
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[14:38] <gonzo__> you could have an LO at 420MHz and that will get you both bands (with 433 being inverted) with one converter
[14:38] <gonzo__> just switch the LNA filtering
[14:40] <gonzo__> that way yoiu may even be able to use high level mixing and notch out the 428MHz it the IF at 8MHz
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[14:51] <AndyEsser> Well I was going to start assembling some sort of mast this evening for the antenna... but as it's pissing it down with rain
[14:51] <AndyEsser> I'll just play video games instead
[14:53] <gonzo__> pft, get a jacket
[14:54] <gonzo__> or do it in the hallway
[14:55] <AndyEsser> gonzo__: bit difficult to mount bits of wood to a trellis in the hallway :P
[14:55] <mfa298> or move down south, looks to be sunny at the moment
[14:55] <mfa298> although no doubt that'll change soon
[14:56] <AndyEsser> it was sunny this morning
[14:56] <AndyEsser> I'm happy with the lower cost of living up here :)
[14:56] <AndyEsser> but with my Cambridge salary :)
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[15:22] <swaledale> AndyEsser: Lucky bugger. I moved further South and kept my North West salary, must be mad.
[15:22] <cm13g09> mfa298: ping
[15:26] <AndyEsser> swaledale: was a condition of me moving ;) Match my current salary
[15:26] <AndyEsser> over the years the Essers have all left the south and moved up north
[15:26] <AndyEsser> well.. my Dad just moved abroard
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[15:34] <fab4space> hello all
[15:34] <fab4space> has anybody here built a quadrifilar helix antenna for 144Mhz?
[15:35] <mattbrejza> yes
[15:36] <fab4space> nice:) I plan to build one as omni for amateur satellites (and maybe balloons)
[15:36] <fab4space> I have seen many designs with various change on the width/height ratio
[15:36] <fab4space> I wanted to know which versions you guys were using and if you were happy with it
[15:37] <mattbrejza> no idea, i did this in 2009 or so
[15:37] <mattbrejza> just used an online calculator
[15:37] <fab4space> ok
[15:38] <fab4space> so far I have tested the turnstile and bought an eggbeater
[15:38] <fab4space> but I am not satisfied by the eggbeater because of too many nulls at various elevations
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[15:39] <craag> You could also try a helical dipole: http://www.g8jnj.net/mixedmodehelical.htm
[15:40] <craag> We use them for 2m and 70cm on http://websdr.suws.org.uk/
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[16:04] <PE2BZ> gonzo__ I like the idea for one LO at 420 MHz. But 433 being inverted is only the frequency spectrum ¨upside down¨ and not all (RTTY hab) signals reversed ?
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[16:16] <gonzo__> just decode in lsb
[16:17] <PE2BZ> gonzo__ but for LoRa or sat telemetry in Packet format that would not work.
[16:21] <fab4space> ok craag thanks
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[16:38] <SpacenearUS> New vehicle on the map: 03CAEN_CP1 - 12http://tracker.habhub.org/#!qm=All&q=CAEN_CP1
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[18:31] <SpacenearUS> New vehicle on the map: 03W5HGT-11 - 12http://tracker.habhub.org/#!qm=All&q=W5HGT-11
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[19:33] <SpacenearUS> New vehicle on the map: 03jayden_chase - 12http://tracker.habhub.org/#!qm=All&q=jayden_chase
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[19:47] <AndyEsser> potentially... stupid question
[19:48] <AndyEsser> In theory... I should be able to take an antenna, attach my scope to the end of it, and see wave form if there's a strong enough signal vaguely around the frequency the antenna is tuned for?
[19:55] <SpacenearUS> New vehicle on the map: 03TROUPYS - 12http://tracker.habhub.org/#!qm=All&q=TROUPYS
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[20:13] <Geoff-G8DHE-Tab> You will see all the signals that the aerial sees all at once!
[20:14] <AndyEsser> Yea, that's what I guessed :)
[20:14] <AndyEsser> if I were to then apply an FFT - that would be the equivalent of what I see at the top of SDR# for eg?
[20:14] <Geoff-G8DHE-Tab> You need to read up on Q
[20:14] <AndyEsser> http://imgur.com/cRS1Ap7
[20:14] <AndyEsser> It's alive!!
[20:16] <Lunar_Lander> yay :)
[20:16] <Geoff-G8DHE-Tab> Yes, but it's also why SDRs get overloaded, with strongest signal overloading the small dyna ic rsnge
[20:17] <Geoff-G8DHE-Tab> Dynamic range
[20:17] <mfa298> you'll probably see signals over the whole spectrum if you applied an fft, but the strongest signals should be across the bands the antennas is tuned for
[20:18] <AndyEsser> mfa298: yea - that was what I was thinking
[20:18] <AndyEsser> thanks for confirming
[20:18] <AndyEsser> so in hardware - I'd take the signal, likely amplify it
[20:18] <AndyEsser> and then apply a cut filter around the frequency I wanted to listen to?
[20:18] <AndyEsser> bandpass*
[20:18] <Geoff-G8DHE-Tab> Bandpass filter
[20:19] <mfa298> you'd usually put a mixer and local oscilator in first, means you can filter at a lower frequency.
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[20:19] <AndyEsser> mfa298: for RX?
[20:20] <AndyEsser> I know for TX you'd have a LO + Mixer
[20:20] <mfa298> although you might put some basic filtering in before the mixer
[20:20] <Geoff-G8DHE-Tab> Superhet receiver
[20:20] <mfa298> it's common on RX
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[20:22] <mfa298> you can generally make your filter tighter and cheaper at lower frequencies, so it might be broad filtering at 434 (or whatever band), then mixer, then more filtering at your IF
[20:22] <AndyEsser> cheers
[20:22] <mfa298> for a multiband radio it also means you can use differnt LO frequency for each band, but they all get to the same IF frequency so that filter is the same over all
[20:28] <AndyEsser> http://imgur.com/s4k1bnG
[20:28] <AndyEsser> I should probably close my curtains...
[20:28] <AndyEsser> people walking passed might think I'm doing something untoward
[20:30] <AndyEsser> also, this is vaguely interesting http://imgur.com/NJOIrTc
[20:35] <mfa298> now you just need to tune up a bit and have some #ukhasnet nodes going.
[20:35] <AndyEsser> yea :)
[20:35] <AndyEsser> I'm on 868.664.800 where there's _something_ but no idea what
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[20:36] <AndyEsser> probably someone's smart meter or similar
[20:42] <russss> there's quite a lot of stuff on that band
[20:42] <russss> chirps and bleeps
[20:43] <adamgreig> bleep bloop
[20:47] <AndyEsser> and no change in signal when I disconnect my antenna
[20:47] Action: AndyEsser glares at SDR
[20:49] <mfa298> have you turned the rtlsdr gain up in sdr#
[20:55] <AndyEsser> Under AGC, increasing the Threshold?
[20:55] <AndyEsser> AGC is disabled atm
[20:56] <AndyEsser> o no wait
[20:56] <russss> yes, AGC should be off
[20:56] <AndyEsser> just seen the RG Gain section in the Settings
[20:56] <AndyEsser> currently all the way to the left
[20:56] <AndyEsser> might be because the SDR isn't plugged in atm
[20:56] <russss> your noise level should probably be somewhere between -50 and -80 when the antenna is plugged in
[20:56] <AndyEsser> let me plug it all back in now
[20:57] <russss> and it definitely should go down when you unplug the antenna
[20:57] <russss> (assuming AGC is disabled)
[20:58] <AndyEsser> noise foor with antenna is ~ -55dB
[20:59] <AndyEsser> upping the RG gain all the way (up to 49.6dB) results in lots of other signals
[20:59] <russss> that's likely to be interference or intermodulation
[21:00] <russss> unfortunately for SDRs, the USB bus has lots of tasty signals
[21:00] <russss> (universal serial bus bus)
[21:00] <russss> (I wonder if anyone's had a go at TEMPESTing USB)
[21:02] <AndyEsser> hmm
[21:02] <AndyEsser> confused
[21:03] <AndyEsser> ok, no antenna plugged in, noise floor at -50
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[21:03] <Ben-AstroSoc> evening
[21:03] <AndyEsser> antenna plugged in - the noise floor is about the same - but more peaks
[21:04] <AndyEsser> so I guess... right?
[21:04] <adamgreig> I bet people have attempted it russss
[21:04] <adamgreig> noise at -50 with no antenna is a little bit alarming but I guess it's an rtlsdr and you have the gain up a bit?
[21:04] <adamgreig> if you see signals suddenly appear when you plug the antenna in that's probably a good sign
[21:05] <AndyEsser> adamgreig: that's what I'm confused about, I'm not actually sure
[21:05] <AndyEsser> I'm currently wondering if there's a dodgy connection in the cable at this end
[21:05] <russss> noise floor should definitely go up though.
[21:05] <AndyEsser> I can't tell if the signals are just intermittent... or appearing when I bend the cable at a certain point
[21:06] <AndyEsser> adamgreig: and yes - RF gain is at full on the RTLSDR
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[21:26] <Ben-AstroSoc> i just know i'm gonna unpack at oxford and realise i've forgotten something dumb
[21:28] <AndyEsser> *sigh*
[21:29] <AndyEsser> think I have a loose connection
[21:31] <AndyEsser> yea... - just sticking a piece of wire on the centre pin of the SDR sends the noise floor up to -40
[21:33] Nick change: stilldavid_ -> stilldavid
[21:36] <fsphil> multimeter time!
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[21:43] <Ben-AstroSoc> https://twitter.com/Astro_Adept/status/733409873128493056 I'm totally going to get arrested
[21:43] <AndyEsser> haha
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[21:46] <edmoore> Ben-AstroSoc: you are for RAL-space?
[21:46] <Ben-AstroSoc> yeah
[21:46] <edmoore> in harwell?
[21:46] <Ben-AstroSoc> mhm
[21:47] <edmoore> i will ping you next time i'm there
[21:47] <Ben-AstroSoc> sure :) i finish next july so
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[21:59] <AndyEsser> sod it - this connector is doing my head in
[21:59] <AndyEsser> will deal with it on the weekend
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[22:08] <Ian_> I see trends AndyEsser :) I think that your 2"x2" could have easily been a long bit of lath. It certainly won't flex in the wind!
[22:08] <AndyEsser> Ian_: hmm?
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[22:10] <fsphil> cryptic
[22:11] <AndyEsser> indeed
[22:12] <Ian_> Serial bodges over a period of time!
[22:12] <AndyEsser> :O
[22:12] <Ian_> Error prone
[22:12] <AndyEsser> I object sir!
[22:13] <Ian_> Most of us are discrete or sneaky enough to not advertise all our fails.
[22:13] <AndyEsser> I'm open about my cock-ups - I'm by no means perfect :)
[22:14] <Ian_> I'm far from perfect, but not so open about it :) I follow your escapades and developments with interest
[22:14] <fsphil> I'm totally prefect
[22:15] <Ian_> You might well be fsphil, Man of the mountain :)
[22:15] <AndyEsser> "escapades"
[22:15] <AndyEsser> ha
[22:16] <Ian_> Even your deliveries have adventures. RW = The Gas Man or have you not heard him referred to as that?
[22:17] <AndyEsser> my deliveries have a more exciting life than I do
[22:17] <Ian_> :)
[22:17] <AndyEsser> and generally I avoid bodges - not a fan of them
[22:17] <AndyEsser> they work in a pinch
[22:17] <AndyEsser> but you pay for that down the line
[22:18] <AndyEsser> this connector however, I made it so the pin is too far back, so doesn't make a good connection with the socket
[22:18] <AndyEsser> so whilst electrically it tested fine... not so great when actually plugged into a socket
[22:20] <Ian_> Ah, I have been fortunate in my selection of N and BNC plugs that they have clicked into place and haven't had that problem . . . yet!
[22:20] <Ian_> Easier to detect the over extended pin I guess.
[22:21] <Ian_> Lesson learned, by both of us, test the cable via a socket that it's plugged into :)
[22:22] <Ian_> If it won't go in, it's too long and if continuity is lost it's too short
[22:22] <Ian_> The pin, that is.
[22:26] <AndyEsser> hehe
[22:26] Action: AndyEsser refrains from making comment
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[23:41] <SpacenearUS> New vehicle on the map: 03HB9FDK-15 - 12http://tracker.habhub.org/#!qm=All&q=HB9FDK-15
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[00:00] --- Fri May 20 2016