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Loggings => HF Mystery Signals => Topic started by: Grinch on July 03, 2026, 0057 UTC

Title: Pirate freq range CW
Post by: Grinch on July 03, 2026, 0057 UTC

I know this isn't specific to Pirate radio, but does anyone know what this CW activity is around 6.949 Mhz is? It's just nonsense. Someone just playing around with a transmitter and a key/paddle? Thanks

Title: Re: Pirate freq range CW
Post by: Grinch on July 03, 2026, 0104 UTC

I did hear a clear CW (?) question mark. If someone 'Not me' still had an unlocked transceiver I'd respond out of curiosity and see what I got in response

Title: Re: Pirate freq range CW
Post by: Radiouser on July 03, 2026, 0113 UTC

Saw this earlier here on HFU:

Not CW, and looks like it will be around awhile?

The Russian Military 20-Baud Signal In the amateur radio (ham) bands, observers frequently log a mysterious, wideband signal that completely disrupts communications. Frequency Shift: Instead of narrow shifts used by typical digital radio or teletype systems (which are usually a few hundred hertz), this signal features a massive 7 kHz frequency shift. Speed & Operation: It operates at a very slow 20 baud (20 symbols per second). Dual-Channel Appearance: Because the frequency shift is so wide, it often visually and audibly sounds like two continuous wave (CW) transmissions running simultaneously or blinking back and forth. Origin & Purpose: Using Time Difference of Arrival (TDoA) networks and KiwiSDR data, radio hobbyists have tracked these signals back to Russian naval or military installations, often in Crimea or near Sevastopol.

Title: Re: Pirate freq range CW
Post by: autovon on July 03, 2026, 0114 UTC

https://www.hfunderground.com/board/index.php/topic,163447.0.html

Title: Re: Pirate freq range CW
Post by: Grinch on July 03, 2026, 0129 UTC

Got some interesting feedback from this and private message. Going to do more research tomorrow. Any info helps and I'll share anything I come up as well, Thanks again to everyone

Title: Re: Pirate freq range CW
Post by: Grinch on July 04, 2026, 0020 UTC

Just turned on my radio. Same signal. 5-9 almost +10. 6.948 mhz roughly Doesn't seem like it could be from Russia. I'm in Florida, it's 8:15 pm. Weird

Title: Re: Pirate freq range CW
Post by: BoomboxDX on July 08, 2026, 0219 UTC

When you hear the fast, CW-like gibberish, check both frequencies that are 7 kHz away. If you hear (or see, on your waterfall) the same thing 7 kHz away, it's probably the Russian 7 kHz FSK.

You may also hear or see them flip away about 2 or 3 kHz, after 20-30 minutes.

Those signals get out. They are probably in Southern Russia somewhere -- either the Crimea, or somewhere in the Caucasus, and they've been widely heard, even in sectors that have daylight.

Title: Re: Pirate freq range CW
Post by: TrueNorthSWL on July 19, 2026, 0702 UTC

Has anyone heard this signal after July 4?
Maybe the transmitter was disabled by Ukraine's attacks on Crimea.

Title: Re: Pirate freq range CW
Post by: BoomboxDX on July 20, 2026, 0010 UTC

I haven't, personally. Haven't seen recent loggings of it on the SW subreddit or RR, the only other SW forums I go to.

I know that sometimes these Russian 7 kHz FSK transmissions have been received in the higher parts of the SW band before, at least within the last 6 months. Can't recall the frequencies but I think they were between 14 - 22 MHz somewhere.