highaltitude.log.20160906

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[01:17] <Ian_> I should be there too
[01:18] <Ian_> Thomaz, Sven and Arko should be arriving during the evening too
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[03:18] <SpacenearUS> New position from 03K6RPT-11 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=K6RPT-11
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[08:28] <gonzo_> looks like UBSEDS is coming around for a full circle. Will this be the second one of theirs to make it around the globe?
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[09:29] <AndyEsser> Radio is here! A day early
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[09:32] <gonzo_> so much for work today then
[09:33] <fsphil> nice
[09:33] <AndyEsser> I've had to put it back in the box
[09:33] <AndyEsser> must behave
[09:33] <AndyEsser> did think it might be worth me starting to charge it
[09:33] <fsphil> yes, don't go radio gaga
[09:34] <fsphil> yeah good idea, takes about 6 hours to charge
[09:34] <fsphil> not sure if they're supplied charged
[09:34] <gonzo_> gety to work, on yoru bicycle
[09:34] <gonzo_> are they still nicad/nimh?
[09:35] <AndyEsser> gonzo_: I've put it back in the box now
[09:35] <AndyEsser> damnit
[09:36] <SpacenearUS> New position from 03DL0PTB-11 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DL0PTB-11
[09:36] <mfa298> Is it a new one or 2nd hand (not sure I'd count on 2nd hand batteries being much good now)
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[09:36] <gonzo_> mine were crap from new (much long ago)
[09:36] <AndyEsser> I went brand new, because I put it through the company
[09:36] <AndyEsser> and it's far easier to depreciate new stuff
[09:37] <AndyEsser> plus warranty and blah blah
[09:37] <gonzo_> friend had two from same batch, also crap. afermarket replacement was better so prob bad batch
[09:38] <fsphil> I think I got about 90 minutes of RX when the battery was fresh
[09:38] <gonzo_> there ar prople doiung LiIon packs. Much better, but suspect they need charging externally.
[09:38] <gonzo_> sounds about righ fsphil
[09:38] <AndyEsser> will dig it out at lunchtime and get it charging
[09:39] <AndyEsser> then have it on RX on the drive home and see if I pick anything up :)
[09:39] <fsphil> it might take you all of lunchtime to figure out how to charge it
[09:39] <gonzo_> use the batt compartment to put something useful, like emergency chocky bar, and run an external pack
[09:39] <mfa298> I'm quite surprised that the Li-ion batteries I got with my handheld still seem to work well
[09:39] <mfa298> and I probably got that 10 years ago now
[09:39] <gonzo_> hehe, yep, that is a pain. Why does it not default to shartge on ext power
[09:39] <fsphil> yeah
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[09:40] <fsphil> and automatic cut-off when full
[09:40] <fsphil> it must be the most basic charging circuit, timer and mosfet
[09:40] <AndyEsser> fsphil: quite
[09:40] <gonzo_> just run an external 12V (you get more o/p too)
[09:40] <AndyEsser> boss is out today...
[09:41] <AndyEsser> gonzo_: O/P isn't useful for atm as I can't TX
[09:41] <gonzo_> pft, never stopped me
[09:41] <gonzo_> did I say that out loud?
[09:41] <AndyEsser> I'm sure I can just borrow your callsign, right? :P
[09:41] <daveake> I had an 817 drop it halfway through the first sentence of a downed payload.
[09:42] <daveake> drop out
[09:42] <mfa298> gonzo_: don't wait for the knock on the door, you could be waiting some time.
[09:42] <daveake> This was atop a steep hill so good job I had a scanner with me too
[09:42] <fsphil> this is M0<mumbles>
[09:42] <gonzo_> offcom didn't even exist then
[09:42] <daveake> Really? I'm M0<mumbles> too! Damn ofcom again
[09:43] <AndyEsser> ha
[09:43] <AndyEsser> goddamit... really want to play :(
[09:44] <gonzo_> think DTI did the enforcement then. I recall a pirate on one of the AR repeaters in b'ham, had a song 'who's afraid of the DTI', the the tune , ...big bad wolf
[09:44] <mfa298> next you'll be looking for the mods so you can discover the pmr chatter is as boring as the lack of ham chatter
[09:44] <gonzo_> laughing policemen. was quite infamous at the time
[09:45] <fsphil> there doesn't seem to be any pirate stations anymore
[09:45] <fsphil> used to have a few here
[09:48] Action: AndyEsser awaits inevitable "like" of tweet from fsphil
[09:49] <gonzo_> used to get 'squeakies' on the repeaters. Good fun listening to them winding up the olf farts
[09:49] <gonzo_> http://www.laughingpoliceman.com/
[09:49] <fsphil> d
[09:51] <gonzo_> there was one on the aylesbury box when I was trying to call someone. So I just joined in and put a squekie voice to call out. Had a laugh with the guy and got the use of the box for the evening. When the locan loany old men were squeakied out
[09:52] Action: gonzo_ realises how long ago that was......
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[11:04] <SpacenearUS> New position from 03IV3SRD-11 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
[11:13] <AndyEsser> It's alive!!
[11:15] <AndyEsser> Ok.... I guess I should read the instructions
[11:16] <AndyEsser> The transmit/busy light is always on...
[11:16] <craag> eek
[11:16] <craag> what colour?
[11:17] <AndyEsser> green
[11:17] <craag> oh that's fine I think (not transmitting)
[11:18] <craag> probably just means the squelch is turned dow
[11:18] <craag> *down
[11:18] <AndyEsser> yea, playinh with squelch drops it off
[11:18] <craag> good :) anyway - read instructions - don't connect the mic til saturday!
[11:19] <AndyEsser> but... I was listening to the Manchester Airport arrivals frequency, and was going to tap the mic... :P
[11:21] <daveake> It comes with a mic ?
[11:28] <fsphil> yeah
[11:28] <fsphil> AndyEsser: safe to tap the mic on that frequency, it won't TX :)
[11:28] <fsphil> they're locked to TX'ing only on the ham bands
[11:28] <fsphil> though that can be fixed with a bit of soldering
[11:28] <craag> s/locked/locked by default/
[11:29] <craag> mm
[11:29] <craag> I thought that was the case with my yaesu car rig (locked)
[11:29] <craag> no, no it is not
[11:29] <craag> will tx anywhere it can tune to (aircraft, marine, etc)
[11:38] <cm13g09> craag: AH
[11:38] <cm13g09> discovered that the hard way?
[11:39] Action: cm13g09 wrangles with MongoDB
[11:39] <SpacenearUS> New vehicle on the map: 03LCARS_chase - 12https://tracker.habhub.org/#!qm=All&q=LCARS_chase
[11:40] <craag> originally yes, was listening in to marine ch. 16, knocked the mic off the desk, rig went quiet, inline power meter went all the way to the right..
[11:40] <craag> tried it on a benuch of other freqs into a dummy load - all of them also worked..
[11:40] <craag> *bunch
[11:40] <cm13g09> oops
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[11:42] <fsphil> hmm. hab launch at the conf. no pressure on whoever is launching that one :)
[11:43] <craag> sounds like there'll be a couple of them
[11:43] <AndyEsser> daveake: it comes with a mic, yes
[11:43] <AndyEsser> pretty useless without
[11:43] <AndyEsser> craag: we can confirm that on Saturday :P
[11:43] <daveake> never used mine
[11:43] <fsphil> I've used mine a few times
[11:46] <gonzo_> not sue i've ever directly transmitted on the 817? Certainly used it as a transverter drive a lot
[11:47] <AndyEsser> need to figure out the best way to hook it up to a laptop....
[11:47] <AndyEsser> just have mic/headphone going into appropriate places?
[11:48] <craag> there is a data jack on the back which has line-in/line-out iirc
[11:48] <craag> along with ptt and stuff
[11:48] <gonzo_> go via the accessory din
[11:49] <AndyEsser> craag: it's a connector that look slike it'd be at home on a WW2 radio set
[11:49] <gonzo_> snap
[11:49] <craag> welcome the modern world of ham radio AndyEsser ;)
[11:49] <craag> *to the
[11:49] <AndyEsser> heh
[11:49] <AndyEsser> I did see that.. but didn't fancy trying to make a breakout
[11:49] <AndyEsser> but... probably more 'elegant'
[11:49] <craag> You can get leads for it on ebay and places too
[11:50] <gonzo_> the data port has audio out, before the vol control.
[11:50] <gonzo_> there is an audio out, also an unfiltered direct fm demod out, for 9600bd packet
[11:52] <gonzo_> suggest decoupling the af out and using a little audio transformer (mine are robbed off old modem cards) to isilate you from the laptop ground
[11:52] <gonzo_> isolate
[11:52] <gonzo_> works really well
[11:52] <AndyEsser> yea...
[11:52] <AndyEsser> maybe a DAC and an opto-isolator
[11:52] <adamgreig> you can also just buy a box that does this
[11:52] Action: AndyEsser doesn't trust himself to plug his own electronics into his laptops
[11:52] <adamgreig> DAC and optoisolator is hard
[11:53] <adamgreig> you have to power the DAC across the optoioslation boundary
[11:53] <adamgreig> you can draw power from the acc jack
[11:53] <gonzo_> do the same in reverse on TX too and you will avoid much problems
[11:53] <adamgreig> but you probably want to get data out of the data socket
[11:53] <adamgreig> I made a cute thing for this problem
[11:54] <adamgreig> take a CHIP (like an rpi, linux sbc with wifi), build a shield for it that connects to the radio data line, power line, and control line
[11:54] <adamgreig> then use pulseaudio over wifi
[11:54] <fsphil> is there such a thing as an opto power isolator IC, with a little emitter and PV cell?
[11:54] <adamgreig> wifi isolated :P
[11:54] <gonzo_> transformer is simple and passive
[11:54] <adamgreig> fsphil: you can just get/make galvo isolated DCDC
[11:54] <adamgreig> I agree with transformer for isolating audio though
[11:54] <gonzo_> the 'data' socket is just analogue audio and FM
[11:54] <adamgreig> bearing in mind huge voltage spikes due to something going very awry will still ruin you
[11:55] <adamgreig> but yea you can buy a box that does this for you, like signallink
[11:55] <adamgreig> fsphil: for eg, the ADuM5201 contains two data isolators and a power isolator
[11:55] <adamgreig> so on one side of the chip is your computer and its serial rx/tx
[11:55] <adamgreig> and on the other side is a power source and tx/rx line
[11:55] <gonzo_> thik that is same, but with a usb soundcard built in. Worth thr 100£ odd for the lack of hassel
[11:55] <adamgreig> and they're air gapped and stuff
[11:56] <adamgreig> yea it's the same, plus often has isolated serial control/rigcat
[11:56] <AndyEsser> adamgreig: that basically counts as Air Gap isolation right?
[11:56] <adamgreig> well depends what you want to mean by that
[11:56] <adamgreig> for security purposes, no, which is the usual meaning
[11:56] <adamgreig> (I shouldn't have said air gapped just then :P)
[11:56] <adamgreig> but in terms of electrical isolation yes :P
[11:56] <AndyEsser> lol sorry, hadn't even read that
[11:57] <AndyEsser> I was half way down catching up :P
[11:57] <gonzo_> my TX is a simple rts/cts RS232 port thingy with a relay on it. Low tech where ever possible
[11:57] <AndyEsser> electrical isolation is what I mean by airgapped
[11:57] <gonzo_> and you can losten for the audible click
[11:59] <KT5TK1> Hi Nerds!
[11:59] <KT5TK1> I have a standalone cusf predictor question:
[11:59] <KT5TK1> predict.py is barfing out an unhandled exception at write_file record = ( hgtprs.array[pressureidx,latidx,lonidx]\... , and then in model.py", line 192, in __getitem__ return self.data[index] IndexError: index 1 is out of bounds for axis 0 with size 1
[11:59] <KT5TK1> Is it possible that the new NOAA data file format is out of sync with what the predictor expects?
[11:59] <fsphil> could do something like PoF, power over fibre
[11:59] <adamgreig> this is what I have: https://www.dropbox.com/sc/zn7m4gonemzlw5h/AAAv1QAeouH6QPOfLaK72ZRQa
[12:00] <AndyEsser> I need to buy a convertor to be able to have an N-type on the back of the radio
[12:00] <fsphil> yes, still an SO thingy. sad
[12:00] <adamgreig> you can have the audio (both ways) forward over the network, you can control the PTT and read the SQL lines via the GPIO, serial port is hooked up to radio control, and it's powered off the radio's supply
[12:01] <AndyEsser> adamgreig: ooo
[12:01] <AndyEsser> that seems a bit more elegant
[12:01] <adamgreig> or you can have it run by itself, plugged in to the pocketchip screen+keyboard, or just working as a parrot repeater or do a digital mode autonomously
[12:01] <adamgreig> so it can be left plugged in to the radio and operate packet repeaters or BBSs or whatever
[12:01] <AndyEsser> lots of playing needed :)
[12:02] <adamgreig> it was the neatest solution to wanting isolated audio+control for digital operation of my radio
[12:02] <adamgreig> bonus is it works with my housemate's 817 just the same as my ic7000 so we made up two of them
[12:03] <adamgreig> (on the ic7k you need three cables, the mono 3.5mm for serial control, the mini-DIN6 for audio in/out and ptt/sql, and the DIN13 for ACC just for power)
[12:03] <adamgreig> (on the 817, the serial control and the power both come out of a mini-DIN8 or something, I forget, so you only need two cables)
[12:03] <adamgreig> as a bonus I also include ferrite beads on all the lines to stop too much rf getting in and out, and level shifting from mysterious radio levels to local 3v3 :P
[12:04] <adamgreig> and the cute rx/tx active LEDs ;)
[12:04] <AndyEsser> lol
[12:04] <AndyEsser> "cute"
[12:04] <adamgreig> also a chunky power filter on the DC input
[12:04] <adamgreig> (and 12V to 5V SMPS)
[12:04] <adamgreig> you can even plug in USB devices and have them powered off it, for memory sticks/keyboards/etc
[12:05] <adamgreig> it's a fun little digital station in a box really :P
[12:05] <AndyEsser> sounds like it
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[12:31] <gonzo_> on some radios I've replaced the So with an N type. Just a flanged one filed oval.
[12:32] <gonzo_> on the 817 i've left it as I use the bnc on the front for everything
[12:32] <gonzo_> (also have added a TX DC bias on that port for driving transverters
[12:33] <adamgreig> wish I could replace my ic7k's SO with an N
[12:33] <gonzo_> the 847 does have adaptors on, as it's a major stripdown to get at the PA's to desolder the connectors
[12:35] <gonzo_> I put up with the loss of an adaptor, as it's updtream od the PA/LNAs. But I just don't trust the reliability of pl259 grounding. So an adaptor nipped up with pliers is perm fitted
[12:38] <AndyEsser> should I have bought an 847 then?
[12:39] <adamgreig> no it's huge
[12:39] <AndyEsser> ah yes
[12:39] <AndyEsser> big beats
[12:39] <AndyEsser> beast*
[12:39] <AndyEsser> wasn't expecting the 817 to be quite as small as it is
[12:42] Action: udat likes his 817
[12:43] <udat> and my 847, get them all
[12:43] <udat> ;)
[12:45] <udat> gonzo_: dc bias on the 817 is on the do to list
[12:46] <gonzo_> the 817/857/897 all look to be based on the same design., The firmware looks similar, so switching between them is easier
[12:47] <gonzo_> the 847 si a different beast. Nolonger made. Tis the only one that will do cross band duplex, so good for satellites
[12:47] <gonzo_> think they have been out of production for 8yrs?
[12:50] <udat> a good while, bought this one used as not available any more and it's a messy early one with some issues I can't figure out
[12:51] <gonzo_> what's up?
[12:52] <udat> spurs +/- 85hz
[12:52] <udat> might have been like this a long time, only noticed when started to do narrow band digital modes
[12:54] <gonzo_> you are running on a linear PSU?
[12:55] <udat> tried switching everything out and running off battery, same
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[12:56] <gonzo_> ah, Hz not kHz. Only just realised
[12:57] <udat> all modes/bands, yeah got a your signal's a mess email on jt9 which made me look
[12:58] <gonzo_> synth loop filter issue? Or some digital noise getting through somewhere?
[12:58] <SpacenearUS> New position from 03UBSEDS18 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=UBSEDS18
[12:58] <gonzo_> isolated feed in from the PC?
[12:58] <udat> tried it in the garden on battery with tone from through mic from a generator on phone
[12:58] <udat> and still there
[12:59] <gonzo_> spurs coem up with ssb mod, or always there even with no mod?
[12:59] <udat> to remove the other stuff from the suspect list
[12:59] <udat> ssb cw am
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[13:00] <udat> I have other radios so not a big deal, mostly use it for listening now and some ssb voice where it doesn't cause an noticable issue for people
[13:01] <gonzo_> when you key with no mod, do you get the spots. Or they come up with modulation
[13:01] <udat> needs modulation
[13:02] <gonzo_> that narrows it down to particular haystacks
[13:02] <gonzo_> needs to be traced through on the bench
[13:03] <gonzo_> do you get the same effect on RX?
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[13:04] <Laurenceb__> UBSEDS18 about to circumnavigate
[13:05] <Laurenceb__> less than a degree to go
[13:07] <gonzo_> what lognditude did nit launch from/
[13:07] <udat> gonzo_: nothing on rx no
[13:08] <gonzo_> narrows it down more, though with caution
[13:08] <gonzo_> lots is common on T and R
[13:09] <gonzo_> time to put it on the bench. You have the service manual?
[13:09] <udat> I can get it, took out the few mods that were in it just in case (first run model)
[13:11] <udat> I did have a look at it and didn't have a few of the things they had listed as needed for various tests
[13:11] <udat> can't remember what it was though
[13:12] Action: udat puts it back on the stop being a wimp and fix it already todo list
[13:14] <gonzo_> www.g0nzo.co.uk/misc/yeasu_data/
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[13:17] <udat> grabbing now
[13:22] <Laurenceb__> circumnavigation!
[13:22] <Ian_> duff link
[13:22] <Laurenceb__> congrats to UBSEDS
[13:24] <Vaizki> \o/
[13:24] <fsphil> .confetti
[13:24] <SpacenearUS> 2´*.D¨¯`* 2D*¨¯`* 2
[13:24] <SpacenearUS> 2´ *. Congratulations 2 ¯`*
[13:24] <SpacenearUS> ¨¯`*D2´* 2.D *¨¯`*2
[13:26] <SpacenearUS> New position from 03MIKEL-3 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=MIKEL-3
[13:27] <udat> nice, i turned radio on incase it went by here too, but way north
[13:28] <udat> Ian_: yaesu_data
[13:28] <gonzo_> ok, almost
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[13:30] <gonzo_> if anyone is looking at the 817 IF tap mods, mine is an early one. Later ones seem to be laid out differently
[13:30] <gonzo_> mine is not the ND I don't think
[13:31] <fsphil> I've noticed that flights coming in from the atlantic rarely pass over NI
[13:31] <AndyEsser> Cos wind, yo
[13:34] <udat> fsphil: :(
[13:45] <fsphil> not just wind, but hot air, http://www.bbc.co.uk/news/uk-northern-ireland-37288257
[13:46] <lz1dev> why is this lady covering her ears?
[13:47] <fsphil> yes, that's not going to help cool down
[13:48] <fsphil> the pi up on the hill got to a chilly 28c overnight
[13:51] <lz1dev> chilly 28?
[13:52] <SpacenearUS> New vehicle on the map: 03N1YIP-11 - 12https://tracker.habhub.org/#!qm=All&q=N1YIP-11
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[15:00] <SpacenearUS> New vehicle on the map: 03ADY2166_chase - 12https://tracker.habhub.org/#!qm=All&q=ADY2166_chase
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[17:43] <SP9UOB-Tom> evening All
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[17:47] <fsphil> howdy
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[18:45] <SpacenearUS> New vehicle on the map: 03rs41 - 12https://tracker.habhub.org/#!qm=All&q=rs41
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[19:40] <SP9UOB-Tom> Hi Mike !
[19:40] <SA6BSS-Mike> hi
[19:40] <SP9UOB-Tom> thanks for listening :-) Unfortunetly it did not boot at the sunrise
[19:40] <SA6BSS-Mike> testing your modified wx si
[19:40] <SA6BSS-Mike> sonde+
[19:40] <SA6BSS-Mike> nop, noticed :)'
[19:41] <SA6BSS-Mike> but it came alive a day later over moscow
[19:41] <SP9UOB-Tom> SA6BSS-Mike: yes, im preparing it for launch from UKHAS conference at saturday :-)
[19:41] <SA6BSS-Mike> ahh, cool, up/down?'
[19:42] <SP9UOB-Tom> SA6BSS-Mike: yes, that was 85 day of mission :-)
[19:42] <SP9UOB-Tom> SA6BSS-Mike: yes
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[19:42] <SA6BSS-Mike> that ballon closing in on 100 days!
[19:42] <SA6BSS-Mike> ok
[19:42] <SP9UOB-Tom> SA6BSS-Mike: I hope so !
[19:54] <SpacenearUS> New vehicle on the map: 03My car_chase - 12https://tracker.habhub.org/#!qm=All&q=My%20car_chase
[20:02] <Upu> hey SP9UOB-Tom
[20:02] <Upu> I'll come get you from station
[20:03] <Upu> 9am Sat morning ?
[20:03] <SP9UOB-Tom> Upu: yes
[20:03] <SP9UOB-Tom> the train arrives exactly 09:03
[20:03] <Upu> hah
[20:03] <Upu> you reckon
[20:03] <Upu> this is England :)
[20:04] <SP9UOB-Tom> hahah
[20:04] <Upu> on your own ?
[20:04] <SP9UOB-Tom> i have your mobile number
[20:04] <SP9UOB-Tom> Upu: yes, just me
[20:04] <Upu> rgr
[20:04] <Upu> you got my mobile no ?
[20:06] <SP9UOB-Tom> Upu: yes, ending with 046 ?
[20:06] <Upu> as per PM :)
[20:06] <Upu> sorted
[20:07] <SP9UOB-Tom> something is wrong with my IRC client and i do not see PM :-(
[20:08] <SP9UOB-Tom> Upu: Thanks in advance !
[20:08] <SP9UOB-Tom> :-)
[20:09] <Upu> thats wierd LeoBodnar said that earlier
[20:12] <SpacenearUS> New position from 03KEMPSP after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=KEMPSP
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[20:16] <SP9UOB-Tom> Upu: can You bring some MAX-8 modules for sale
[20:18] <Upu> Yeah I'd rather not be carrying piles of stock so place and order but select collect in store and I'll bring them with me
[20:18] <SP9UOB-Tom> OK
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[20:32] <SpacenearUS> New vehicle on the map: 03test-BK - 12https://tracker.habhub.org/#!qm=All&q=test-BK
[20:47] <SpacenearUS> New position from 03N4XWC-1 after 033 days silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[20:58] <Garak> Are there any inexpensive pressure sensors that are good beyond 10km in altitude
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[21:00] <ryan_in> Garak: This is the one I'm using for my flight. Other people have also used it successfully https://learn.adafruit.com/adafruit-bme280-humidity-barometric-pressure-temperature-sensor-breakout/overview
[21:02] <Garak> I think that is what we flew over the weekend but the data sheet says its only rated for pressure down to 300hPa
[21:02] <ryan_in> Garak: How were the results?
[21:03] <Garak> it says we reached about 83,000ft but we have no way to verify that
[21:03] <SIbot> In real units: 83,000 ft = 25.3 km
[21:04] <Garak> we were expecting it to reach more like 30-35km
[21:04] <craag> Can you compare against gps data?
[21:04] <Garak> the APRS gps quick at 40,000ft
[21:04] <SIbot> In real units: 40,000 ft = 12192 m
[21:04] <Garak> the other GPS wasn't recording :(
[21:04] <craag> ah, no flight mode
[21:05] <Garak> I had to switch GPS boards the night before and forgot to check the firmware on the backup board
[21:05] <craag> oops :)
[21:06] <craag> but yes, you can't really trust any cheap pressure sensors under their rated pressure.
[21:06] <adamgreig> or indeed any pressure sensors under their rated pressure :P
[21:06] <Garak> that was for my APRS tracker, then our RPi guy didn't start the GPS logger because he thought it was still the broken script we were testing the night before
[21:06] <craag> err yes that
[21:08] <Garak> we also didn't have the RPi synced to GPS time, 1/2 the sensor data isn't time stamped at all...
[21:08] <craag> Oh well, all good lessons for flight #2 ;)
[21:08] <Garak> I came in the group as the "ham radio guy"
[21:09] <Garak> I ended up running the APRS tracker independently of the rest of the payload
[21:10] <craag> good plan, we often run several trackers totally independently - metres apart on the cord.
[21:11] <Garak> It worked good except for the position freezing an hour in. Then we go one good position(less altitude) an hour later. Then some bad positions 30 min after that(it looked like it did a uturn) then 30 min after that it came back dropping 2000ft/min
[21:11] <SIbot> In real units: 2000 ft = 610 m
[21:12] <craag> ~10m/s
[21:12] <craag> a bit quick :)
[21:12] <Garak> yea it was scary for around 15 APRS frames
[21:13] <Garak> then it slowed down once it was below 3000m
[21:13] <craag> ah ok
[21:13] <Garak> Ended up in a 60ft pine tree in the woods behind a dairy farm
[21:13] <SIbot> In real units: 60 ft = 18 m
[21:13] <craag> yeah we've seen payloads exceeding 100m/s on initial freefall I think
[21:13] <Garak> the farmer was nice enough to cut it down, along with two others that it got caught in
[21:13] <craag> (at 35km)
[21:14] <craag> :)
[21:14] <Garak> The Pi cam pictures were great, we were not impressed with the GoPro pictures
[21:14] <craag> where was the launch?
[21:15] <Garak> Nova Scotia, Canada
[21:15] <craag> :)
[21:15] <craag> So a successful recovery despite everything!
[21:15] <craag> well done!
[21:16] <Garak> The gopro was facing down. The best pictures were right after the pop when it was tumbling
[21:16] <Garak> sorry pi camera
[21:16] <craag> have you posted them up somewhere?
[21:18] <Garak> Not publicly yet. Here is one I picked for facebook https://www.facebook.com/photo.php?fbid=10153820974801517&set=a.10153820975221517.1073741826.604276516&type=3&theater
[21:18] <kc2pit> Did you run simulations of the flight path? That U-turn near apogee isn't uncommon.
[21:18] <craag> Nice coastline!
[21:19] <Garak> Yea we did alot of simulations, the uturn was too extreme, it was bad GPS data
[21:19] <Garak> when it dropped below 40,000ft it matched the simulation perfectly
[21:19] <SIbot> In real units: 40,000 ft = 12192 m
[21:20] <craag> what gps unit were you using on the aprs tracker?
[21:20] <Garak> it was a Neo6 I thought
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[21:21] <craag> Yeah ~12,100m is the ceiling of a ublox not in flight mode iirc
[21:22] <craag> We've done the same ;)
[21:22] <craag> Well I look forward to seeing the rest of the photos, do post a link on here when you publish them!
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[21:23] <Garak> Has anyone come up with a simple but effective way to reduce spinning?
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[21:25] <Garak> I was having trouble with the Neo6 I had planned to fly defaulting back to the proprietary protocol rather than nema
[21:25] <Garak> so without really thinking I grabbed the other one
[21:27] <craag> we've found that putting ball-bearing fishing spinners inline above the payload, and making the mass of the payload more spread out horizontally, both help with spinning
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[21:33] <ZS5LT> I had a bad spinning problem on my last 2 flights, FLIHI_NK the last flight had fishing spinners inline. it did not help on the descent, the entire payload train was all twisted up.
[21:33] <ZS5LT> There was a presentation that indicated that the parachutes were the main cause of the spin on descent.
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[21:43] <Laurenceb__> simple way: use braided cord
[21:43] <Laurenceb__> more complex way: use two or more cords
[21:44] <adamgreig> hard way: active gyro stabilisation
[21:44] <Laurenceb__> heh
[21:49] <Laurenceb__> are either of the conference organisers around?
[21:49] Action: Laurenceb__ has decided he would like to come along :D
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[21:56] <Ian_> Hit the link at the top of the page Laurenceb__ and the Paypal button isn't far away.
[21:56] <Garak> One interesting thing I noticed is that distant APRS digipeaters heard our signal more than local ones. I'm assuming its because the repeaters are using colinear antennas that are fairly deaf directly above
[21:56] <Laurenceb__> ah
[21:56] <Laurenceb__> I must be blind, couldnt find the paypal
[21:56] <Laurenceb__> thanks
[21:56] <Ian_> And that's before beers :)
[21:57] <Garak> a digipeater over 250km away was repeating the frames to an igate 300km away
[21:58] <Garak> consistently through the flight
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[21:58] <Garak> at one point it was heard 400km away
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[23:05] <SpacenearUS> New position from 03IV3SRD-11 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
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[00:00] --- Wed Sep 7 2016