Topics

16

HF Mystery Signals / 7939 @ 0350z - analog? digital? SigIDWiki fails me again!

« on: April 02, 2022, 0406 UTC »

I never seem to be able to find a decent match for my mystery signals at SigIDWiki. This one looks like digital modes with a number of discrete frequency points used, but the frequencies "bend" while being transmitted (voice encryption?). Sorry I'm not more versed in the proper terminology. Screen capture of waterfall:

Audio clip: https://www.lutins.org/sdr/7960_USB_3_kHz_bw.mp3

Thanks for any ID assistance!

17

For Sale / Wanted / Barter / Rockmite 40m & 80m QRP CW transceivers with RMK keyer chips & keys - tested

« on: March 24, 2022, 0044 UTC »

NOTE: This item is being sold via eBay. Please do not contact me regarding a personal sale, as that is against eBay policy.

Small Wonder Labs Rockmite 40 meter (7030 kHz) and 80 meter (3686 kHz) QRP CW transceivers - sold as a set. I am a professional electronics technician (and amateur radio operator, of course). I built these units years ago, including the optional RMK keyer chips (to provide advanced functions, such as memory) and miniature paddles. I recently evaluated all functions, and both radios are in perfect working order, with the 40m radio putting out 552 mW and the 80m radio putting out 333 mW when fed with a 12 volt power supply. Also included are a 12 volt auto adapter, ear buds, and full documentation on a USB drive. Equipment is from a non-smoking home. These are great for backpacking! Each measures 2¼ inches (57 mm) wide x 3½ inches (89 mm) x 1 inch (25 mm) high (not including the paddles). Refer to ebay listing at https://www.ebay.com/itm/165393111113 for photos, including screen captures from spectrum analyzer testing.

18

Utility / 6765 kHz USB SHARES North (FEMA) net 13 Mar 2022 @ 2350 GMT

« on: March 14, 2022, 0007 UTC »

NNQ5GR calling stations for the net; "no stations heard" then data (unid format), then brief exchange with NNA5HF. If someone wants to help me ID the data mode, recording is at https://www.lutins.org/sdr/6765_SHARES.mp3.

19

Shortwave Broadcast / unid 6930.9 AM 0130 UTC 13 Mar 2022

« on: March 13, 2022, 0143 UTC »

News forecast with male and female announcers in language I can't identify - low signal amplitude, very narrowband AM (I'm seeing less than 2 kHz), high noise level. Curious that it's off-frequency; nothing listed at shortwaveschedule.com for 6930 nor 6931. If you want to struggle through the poor audio and help me identify this, audio clip at https://www.lutins.org/temp/sdr/6930.9.mp3.

20

HF Mystery Signals / Unid 11318 dig (2-second bursts preceded by short tone)

« on: February 27, 2022, 0346 UTC »

Approximately 2.4 kHz wide, 2-second long digital bursts preceded by a very brief tone; usually individual bursts, but sometimes 2 in a row. Closest match I can find on SigIDWiki is STANAG 4197, but 4197 appears to have a multiple-frequency opening tone, whereas my signal has a single tone.
Audio clip: https://www.lutins.org/temp/sdr/11318_burst.mp3
Waterfall:

21

Utility / Halifax Coast Guard Radio on 2749 (!)

« on: February 01, 2022, 0245 UTC »

Loud clear signal despite high noise (SINFO 55355) on 2749 kHz at 0240z on 1 Feb 2022. Twice announced "Halifax Coast Guard Radio" followed by French (unknown content - I don't speak French) then marine forecast in English. Nothing out of the ordinary - except - in my log notes I notated a while back, "discontinued September 2010". Are my notes wrong, or was the station resurrected?

22

Shortwave Broadcast / PBS Xizang 9490 AM 0336 UTC 29 Jan 2022 (with jammer)

« on: January 29, 2022, 0338 UTC »

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

23

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

24

North American Shortwave Pirate / Clever Name Radio 6900 USB 0109 UTC 13 Jan 2022

« on: January 13, 2022, 0110 UTC »

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

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

25

North American Shortwave Pirate / N.A.P.R.S (WLIS relay) 6921 AM 0105 UTC 12 Jan 2022

« on: January 12, 2022, 0109 UTC »

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.

26

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

27

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.

28

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!

29

North American Shortwave Pirate / Outhouse Radio 6955 USB 0154 UTC 9 May 2021

« on: May 09, 2021, 0155 UTC »

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

30

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