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Topics - alleycat

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Strong buzzing jammer is fading in & out on same frequency (guessing location is China); Tibetan language broadcast from Lhasa, Tibet can be heard intermittently during jammer fades

Shortwave Broadcast / Radio Ethiopia? 7110 AM 0410 UTC 16 Jan 2022
« on: January 16, 2022, 0424 UTC »
Moderate signal in upstate NY, northeastern U.S.  I'm usually pretty good at identifying a language or language group, but this one stumps me. Suspect Ethiopia Radio (in Amharic), but ShortwaveSchedule.com et al state that this station is only on 1500-1800. Heard what sounded like news for a while, eventually transitioned to music. There is occasional interference from hams. Voice sample at https://www.lutins.org/temp/sdr/7110_AM_16-Jan-2022_0405z.mp3, music sample at https://www.lutins.org/temp/sdr/7110_AM_16-Jan-2022_0417z.mp3

Decent signal despite heavy noise (SINFO 55244). Techno? dance music.

EDIT: Doors "Break on Through" @ 0118 UTC - now booming in (55355)

Just came on the air (@ 0000z ?) - audio's a bit weak, but ID sounds like "WLIF". Voices only (no music) but too much QRN to make out what I'm hearing.

North American Shortwave Pirate / UNID 6919 LSB 2326 UTC 31 Dec 2021
« on: December 31, 2021, 2327 UTC »
"Giorgio by Moroder" by Daft Punk (thank you SoundHound!) - excellent signal here - well above the noise floor with very little fading

Shortwave Broadcast / unid 6865 AM 2240 UTC 31 December 2021
« on: December 31, 2021, 2245 UTC »
Very weak - can make out a man's deep voice narrating something (no music). Presumably a pirate (based on frequency) but not totally sure.

HF Mystery Signals / Amateur mode 3596 kHz - FSK?
« on: July 16, 2021, 0413 UTC »
I'm seeing several frequencies in the 80 meter band with nearly 2 kHz-wide bursts that appear to be some sort of FSK (although none of the sources I'm familiar with, such as SigIdWiki, seem to identify an FSK variant with this wide a bandwidth). Audio clip at https://www.lutins.org/temp/radio/3596.mp3 with waterfall as depicted below. Any ideas? Thanks!

Moderate signal with little fading and some static crashes. "Your Love" by The Outfield.

Utility / U.S. mil network? 6986.5 USB 0120z 1 May 2021
« on: May 01, 2021, 0132 UTC »
I am hearing "Net Control" exchanging traffic with various stations such as "Desert Eagle", "Sunspot 05" and "Highcard Sierra". One lengthy exchange involved an "unclassified request for information" to "Send a highway sit rep for the following areas of interest" after which locations on Interstate and State highways in 13 states were identified.

Some of the stations exhibit strong signals (S7 and higher, with low noise & no fading) in Binghamton, NY. The chatter sounds like MARS, but the callsigns don't. Can someone tell me what I'm actually listening to? Sample at https://www.lutins.org/temp/radio/6986.5_2021-05-01_0115z.mp3

HF Mystery Signals / Amateur mode 7040kHz PSK variant?
« on: March 30, 2021, 0143 UTC »
I'm seeing 2-minute long narrowband (roughly 75 Hz wide?) digital QSOs on 7040 kHz that I can't identify (apparently nothing similar at SigIdWiki). I think it might be some variant of PSK based on the resources at http://www.w1hkj.com/modes/index.htm, but I ran through all these modes in MultiPSK to no avail. Audio at https://www.lutins.org/temp/radio/7040_digi.mp3 waterfall as shown below. Thanks for any assistance!

I'm currently (24 March @ 0030z) monitoring 4300 kHz and hearing a series of very short pips at a 4-second interval. Folks on the UDXF discussion group at groups.io have reported this phenomenon on a large number of HF frequencies being audible around the world (including SDRs in North America, Austria and China). Audio clip at https://www.lutins.org/temp/radio/pips.mp3; waterfall as follows:

HF Mystery Signals / 7040 kHz - 5 second bursts, 150 kHz bandwidth
« on: March 14, 2021, 0207 UTC »
I'm familiar with most common amateur digital modes, but tonight I'm hearing (a new?) one on 40m from several stations that doesn't appear to be represented at SigIdWiki. Audio at https://www.lutins.org/temp/7042.mp3; waterfall thus:

HF Mystery Signals / Resources to ID VHF/UHF sigital signals?
« on: February 20, 2021, 1452 UTC »
Sorry if this is a bit off-topic. I recognize & respect that this is a forum for ID'ing HF signals. Can anyone point me to a similar forum for assistance in identifying unknown digital signals above 30 MHz not represented at SigIDWiki? Thanks!

P.S. If anyone *does* want to take a crack at it here, I'm hearing an approximately 15 kHz wide intermittent signal on 72.1 MHz that lasts roughly 2-10 seconds and sounds like a pager, but definitely is not POCSAG - waterfall at https://www.lutins.org/temp/701.jpg and audio at https://www.lutins.org/temp/701.m3. Promise I won't pester y'all with above-30 MHz signals again!

I just got ADS-B software up and running on my RPS1A. I notice route discrepancies between the software it uses (Virtual Radar Server) and other information sources. For example, for Jetblue flight 634 (7 Feb 2021), I observe the following:
 - Virtual Radar Server (Ver. identifies origin as San Francisco & Destination as Boston
 - FlightRadar iPhone app identifies origin as Port-Au-Prince & Destination as New York (JFK)
 - FlightAware.com identifies origin (Port-Au-Prince, Haiti) & Destination (Syracuse, NY) [these appear to be correct based on the flight track]

So why the discrepancies, and who do I believe? Thanks and happy monitoring!

Utility / Military? 6855 kHz USB (voice) starting 2323z 26 Jan 2021
« on: January 27, 2021, 0014 UTC »
I can find no record of 6855 kHz being an active mil freq, but heard what sounds like mil air traffic at 2323z and again at 2357z. Recordings of first message at https://www.lutins.org/temp/6855_1.mp3 and second message at https://www.lutins.org/temp/6855_2.mp3. Transcript (best as I can discern) of first message is as follows (M = male; F = female):

M: [Sevine ?] [Sevine ?] Speedair zero one, Speedair zero one
F: Speedair zero one [flight ?] forward go ahead
M: Charlie three five Charlie three five, Golf two three Golf two three, [chest ?] now zero two zero, zero two zero
F: Charlie three five Charlie three five, Golf two three Golf two three, zero two zero, zero two zero
M: Roger Roger

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