highaltitude.log.20220529

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[00:11] <SpacenearUS> New position from 03SQ3GJS-4FSK after 037 days silence - 12https://tracker.habhub.org/#!qm=All&q=SQ3GJS-4FSK
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[02:03] <SpacenearUS> New position from 03SQ3GJS-12 after 037 days silence - 12https://tracker.habhub.org/#!qm=All&q=SQ3GJS-12
[02:03] <SpacenearUS> New position from 03DG4NOB-7 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DG4NOB-7
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[03:41] <SpacenearUS> New position from 03NOB9 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB9
[05:58] <SpacenearUS> New vehicle on the map: 03VK5LJG-4FSK - 12https://tracker.habhub.org/#!qm=All&q=VK5LJG-4FSK
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[06:01] <two4tea> Hi All
[06:02] <two4tea> No luck with changing the PSU VK5QI. Auto_rx is still crashing after a few hours
[06:24] <VK5QI> bugger
[06:24] <VK5QI> what model rtlsdr is it?
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[07:38] <PE2BZ> two4tea, what kind of Pi you where using ? I had issues with an older model with 2 USB ports, that had the SMD fuses for the USB port dropping 0,7 volt when the rtl was inserted.
[08:03] <SpacenearUS> New vehicle on the map: 03DK0LRT-11 - 12https://tracker.habhub.org/#!qm=All&q=DK0LRT-11
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[08:23] <SpacenearUS> New vehicle on the map: 03PA3FNT-4FSK - 12https://tracker.habhub.org/#!qm=All&q=PA3FNT-4FSK
[08:23] <SpacenearUS> New vehicle on the map: 03PA3FNT-RTTY - 12https://tracker.habhub.org/#!qm=All&q=PA3FNT-RTTY
[08:27] <two4tea> It's an RTL-SDR.COM dongle
[08:28] <two4tea> I have an old raspberr pi 2.
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[08:58] <VK5QI> mmk, the v3 sdrs are fine, and i have run this on a rpi 2
[08:58] <VK5QI> so yeah, not sure what the issue is sorry
[09:13] <PE2BZ> two4tea, did you ever open the V3 to check for fake or real ?
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[09:24] <two4tea> I didn't open to check the SDR was real, but I did order it from RTL-SDR.COM offical Aliexpress page.
[09:26] <PE2BZ> That should be the real thing :-)
[09:28] <two4tea> Yeah. So I've been testing and it seems that when I use the wlan usb dongle, I get undervoltage errors
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[09:42] <PE2BZ> Can you take an image from the top and bottom of the Pi ? Still considering to bridge the USB smd fuse....
[09:51] <two4tea> me?
[09:51] <PE2BZ> Yes
[09:52] <PE2BZ> Assuming you can solder a wire bridge ?
[10:05] <two4tea> Yeah, plenty of scope for that
[10:08] <two4tea> lots of undervoltage errors from hwmon
[10:08] <two4tea> running rtl-sdr dongle, usb dongle & stress-testing cpu
[10:10] <two4tea> thing is I've tried a bunch of different usb cables and psu's and there doesn't seem to be any difference with the errors
[10:28] <VK5QI> can you test running the system via ethernet?
[10:31] <two4tea> doing that now... :)
[10:32] <two4tea> currently testing through a 4AH usb hub attached to RaspberryPi micro-usb
[10:46] <two4tea> yep... too much voltage drop in the lead I recon
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[11:32] <PE2BZ> two4tea, still a chance to bypass the smd fuse(s) , there should be one near the power input
[11:34] <SpacenearUS> New position from 03W3UAV-10 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W3UAV-10
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[11:41] <two4tea> hitting it with the big stick now!
[11:52] <PE2BZ> If you break it, I have stock :-)
[12:07] <two4tea> thanks!
[12:07] <two4tea> how long into the docker conveiance scrip: https://github.com/projecthorus/radiosonde_auto_rx/wiki/Docker does it take to install docker?
[12:09] <VK5QI> it will probably try and update some system packages
[12:09] <VK5QI> so if you are out of date... maybe a while?
[12:09] <VK5QI> also if you are on a rpi 2 it will be slow..
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[12:13] <two4tea> ok... good to know
[12:18] <two4tea> docker: unknown server OS: .
[12:29] <two4tea> sorted
[12:54] <SpacenearUS> New position from 03N6CVO-15 after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N6CVO-15
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[15:03] <SpacenearUS> New position from 03BZ-LORA-6 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=BZ-LORA-6
[15:05] <SpacenearUS> New vehicle on the map: 03W3UAV-02 - 12https://tracker.habhub.org/#!qm=All&q=W3UAV-02
[15:52] <SpacenearUS> New position from 03PA3DJR-27 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PA3DJR-27
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[18:23] <SpacenearUS> New vehicle on the map: 03KG5TED-18 - 12https://tracker.habhub.org/#!qm=All&q=KG5TED-18
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[19:36] <SpacenearUS> New position from 03PD7PN-R after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=PD7PN-R
[19:38] <SpacenearUS> New vehicle on the map: 03VE5AA-11 - 12https://tracker.habhub.org/#!qm=All&q=VE5AA-11
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[19:54] <W1MXJ> Hi folks! Should I expect to be able to receive a 405.3 MHz sonde with a standard UHF radio antenna?
[19:54] <PE2BZ> My bet would be sure :-)
[19:54] <PE2BZ> At certain altitude
[19:55] <W1MXJ> Sure - I'm attempting to receive RS41-SGP P4150274 and it seems like it's fairly near to my location, but I'm not receiving a thing
[19:56] <W1MXJ> not sure what else could be going wrong
[19:56] <PE2BZ> What receiver ?
[19:56] <W1MXJ> NooElec SmarTee
[19:57] <PE2BZ> You do receive ¨other signals¨ with the SmarTee and the antenna combination ? not by any chance used an Reversed Polarity SMA adapter ?
[19:59] <W1MXJ> Nope, nothing is RPSMA. And if I plug this sdr stick into a laptop, I can tune to other signals
[20:00] <PE2BZ> Do you see the sonde on the laptop ? I am guessing you are running auto_rx at this moment ?
[20:01] <W1MXJ> I'm running auto_rx uploading to sondehub. I can't see the signal through SDRSharp.
[20:02] <W1MXJ> I see zero signal at 405.3
[20:02] <W1MXJ> I really don't know what I could be doing wrong, it's very nearby at this point
[20:03] <PE2BZ> the scan plot in auto_rx does not show signal(s) ?
[20:04] <W1MXJ> Uploaded file: https://uploads.kiwiirc.com/files/52a7e78e5350725d267fdefaaefefcac/autorx_scan.JPG
[20:04] <W1MXJ> No peak at 405.3 despite that you can see the orange dot there
[20:05] <W1MXJ> (i put 405.3 as an always_scan)
[20:05] <W1MXJ> There are two other people very far away who are receiving this sonde just fine
[20:05] <PE2BZ> What gain setting do you use for auto_rx ?
[20:06] <W1MXJ> -1
[20:06] <PE2BZ> https://imgur.com/QA11dFD
[20:06] <PE2BZ> I find your values looking like overloading.
[20:07] <W1MXJ> Interesting, are you suggesting reducing my gain?
[20:08] <PE2BZ> yes. Stop the software, run rtl_test and note the valid values
[20:08] <W1MXJ> I get: 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[20:08] <PE2BZ> Which I guess are 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[20:09] <W1MXJ> Looks like we match
[20:09] <PE2BZ> try 28.0
[20:09] <PE2BZ> Had run this for an websdr in UK last week :-)
[20:10] <W1MXJ> Uploaded file: https://uploads.kiwiirc.com/files/70e499916004638da7534542aba3a4be/autorx_gain28.JPG
[20:10] <W1MXJ> There's what I have now - looks indistinguishable, as far as I can tell
[20:11] <PE2BZ> No preamp ?
[20:11] <PE2BZ> try 12.5
[20:12] <W1MXJ> Correct - I had one on there but took it off since I don't actually know its noise figure and it might be doing more harm than good. Can add back in if you like. Switching for 12.5 for now...
[20:13] <PE2BZ> No, at 24 km altitude you would not need the preamp. First get good rx without :-)
[20:13] <W1MXJ> ah shoot i messed up on the 28, it was still at -1 (forgot to save the station.cfg properly). Still, we'll try 12.5
[20:14] <W1MXJ> Uploaded file: https://uploads.kiwiirc.com/files/2bb9dad3d15fa4c4616d745088006589/autorx_gain12_5.JPG
[20:14] <W1MXJ> Here's 12.5, noticeably reduced
[20:14] <W1MXJ> still no peak at all at the sonde frequency
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[20:15] <PE2BZ> Any local FM station ?
[20:15] <W1MXJ> I'm in a city so there are FM stations around, yes
[20:15] <W1MXJ> Not like, in my backyard or anything
[20:15] <PE2BZ> My best bet for now would be, run rtl_tcp on the auto_rx setup, connect sdrsharp remotely to that server, check for the signal and adjust the gain in sdrsharp.
[20:16] <PE2BZ> In my imagination I see 5 FM radio stations in your waterfall. If all fails a bandstop 86-108 MHz might be worth a try.
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[20:18] <W1MXJ> hmmm okay, never used rtl_tcp before, frantically trying to get it to run :)
[20:19] <PE2BZ> rtl_tcp -a ip.add.res.ss:port
[20:20] <W1MXJ> That gives `local address 192.168.0.20:1234 ERROR - Name or service not known.`
[20:21] <PE2BZ> the balloon bursted. If you want to try connect the dongle to the laptop
[20:21] <W1MXJ> Yeah I
[20:22] <W1MXJ> I've tried that, can't find the 405.3 signal from the laptop either
[20:22] <PE2BZ> 405.3 MHz
[20:23] <PE2BZ> But with an radio amateur callsign I guess you know the difference between kHz and MHz :-)
[20:23] <W1MXJ> yep of course, i'm at 405.3 mhz
[20:24] <PE2BZ> Cant´help you now, have to head to bed, tomorrow is a working day. If all fails I can send you an RS41 tracker for local testing :-)
[20:24] <W1MXJ> Going to go drive out, hopefully getting away from the city will get rid of that FM interference
[20:24] <PE2BZ> I might even have one from Germany which transmits on 405.3
[20:24] <SpacenearUS> New position from 03BSS43 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS43
[20:24] <W1MXJ> Thanks for your quick words of advice :)
[20:24] <PE2BZ> Your welcome !
[20:24] <PE2BZ> good luck !
[20:25] <PE2BZ> You have a baofeng around which can transmit on 405.3 ? Key it once :-)
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[21:59] <SpacenearUS> New position from 03NOB14 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NOB14
[22:53] <SpacenearUS> New position from 03PA3DJR-27 after 036 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PA3DJR-27
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[00:00] --- Mon May 30 2022