Messages

136

SDR - Software Defined Radio / Re: RTLSDR based scanner for P25

« on: January 15, 2019, 2136 UTC »

ARGH.  It's decoding the traffic (or at least recognizing broadcasts from the various talkgroups) but I can't get it to push the decoded audio to my headphones.  The headphones and software audio device works (at least for speaker-check!), but I don't know if it's a decode problem or a communications problem between rx.py and the audio system

137

SDR - Software Defined Radio / RTLSDR based scanner for P25

« on: January 15, 2019, 0239 UTC »

Ran across this tutorial, and it worked very well for getting a somewhat operational (still working on audio issues!) scanner going based on a rtl-sdr stick and a Raspberry Pi...

https://www.hagensieker.com/wordpress/2018/07/17/op25-for-dummies/

138

HF Mystery Signals / Re: UNID 9000 kHz 1914 UTC 11 Jan 2019

« on: January 12, 2019, 2021 UTC »

Thanks!!  No point chasing TDoA if it's just analyzing noise. 

One update....there's some drift in the carrier this afternoon.  Looks like it's a few Hz below 9000kHz now, but drifting back up.....

139

HF Mystery Signals / Re: UNID 9000 kHz 1914 UTC 11 Jan 2019

« on: January 12, 2019, 1823 UTC »

Has it moved again?  Would be nice to catch some indication on the spectrum that there was a switch.....

Any TDoA experts care to weigh in?  Are we just chasing timing errors or is this carrier really being broadcast at multiple sites?

140

HF Mystery Signals / UNID 9000 kHz 1914 UTC 11 Jan 2019

« on: January 11, 2019, 2017 UTC »

Maybe our 8000kHz carrier moved to a new frequency?  -87dBm here, started around 1914 UTC 11 Jan.  The spectrogram looks very similar. TDoA is all over the place, but seems to converge in the midatlantic area somewhere. 

141

HF Mystery Signals / Re: UNID 8000kHz persistent signal

« on: January 11, 2019, 1723 UTC »

Back on for ~4 min 1719-1723 UTC 11 Jan and intermittently for a few minutes after:  TDoA suggests not on the east coast this time:

142

HF Mystery Signals / UNID 8000 kHz 1434 UTC 10 Jan 2019 signal

« on: January 11, 2019, 0202 UTC »

Strong carrier (-85 dBm at my location currently); about 3Hz wide; might be LSB?.  Has been on since at least 1434 UTC 10 Jan.  TDoA during the day (~2000 UTC) suggests possibly two transmitters...one east coast, one midwest. 

143

North American Shortwave Pirate / Yeah Man Radio 6925 AM 1959 UTC 01 Jan 2019

« on: January 01, 2019, 1958 UTC »

1958: steely dan
2000: station ID as Yeah Man Radio & more steely dan


S2-3 w/ fades.  SIO 333-ish

144

North American Shortwave Pirate / Re: UNID 6935 USB 1838 UTC 8 Dec 2018

« on: December 08, 2018, 1852 UTC »

Booming here....S5+, SIO 555

1852:  another speech

145

Equipment / Re: Eddystone 830-4

« on: December 08, 2018, 0410 UTC »

DROOL.

146

Shortwave Broadcast / Radio Ukraine International 7780 AM 0240 UTC 27 Nov 2018

« on: November 27, 2018, 0242 UTC »

SIO 444.  Some minor fading.

0242: reporting on the Sea of Azov incident

via WYFR.  Grrr. 

147

Clandestine Stations / Radio Marti 7355 AM 0227 UTC 27 Nov 2018

« on: November 27, 2018, 0228 UTC »

SIO 555.  Not a trace of jamming, signal peaks up to S8 (!)

148

North American Shortwave Pirate / Re: UNID 6950 USB 2216 UTC 25 Nov 2018

« on: November 25, 2018, 2238 UTC »

Just above the noise floor here.  Off at 2237

149

North American Shortwave Pirate / YEAH MAN RADIO 6921 AM 2123 USB 25 NOV 2018

« on: November 25, 2018, 2124 UTC »

Drum intro, then jazz.....S4
2140: station ID

150

North American Shortwave Pirate / The Quacker, QWK 6878 USB 2210 UTC 24 NOV 2018

« on: November 24, 2018, 2211 UTC »

2210: Bruce Springsteen "Highway 29"