Identify this CW on AM...

[Se7en]

Identify this CW on AM...it wouldn't receive on SSB or CW narrow or wide. It is perfect keying on 5.8MHz but i find it odd not being able to listen on another carrier. i tried to use Notch filter which didnt help because i guess its junky on AM. but listen in and let me know what you think it says. FILE FORMAT MP3 2300PST

 

[W5LZ]

Couldn't understand/hear parts of it and only went about half way. But;

TT TFDNR IDURN DIGRT NRAAG RUWIW NDAAR RFWDU
NGRUR TRDAD NNIDU AETGAU UUGBT NNUII UAWNL ???FD
ITWIW LUGIGRT UUAA ??? ...

What is it? No idea.
- 'Doc

 

[Beetle]

5-letter coded groups were used by the military in the 1960s and much earlier. From the way you described things, apparently the transmitting station had an AM transmitter and was modulating it with an audio tone - almost what would be called "Modulated Continuous Wave", or MCW. For real MCW, however, the carrier and the audio signal would have to be keyed at the same time.

This clip is just AM modulated with a Morse-code audio signal, not "MCW".

You would need the proper code book or other decryption device to translate this into something understandable.

 

[Se7en]

5-letter coded groups were used by the military in the 1960s and much earlier. From the way you described things, apparently the transmitting station had an AM transmitter and was modulating it with an audio tone - almost what would be called "Modulated Continuous Wave", or MCW. For real MCW, however, the carrier and the audio signal would have to be keyed at the same time.

This clip is just AM modulated with a Morse-code audio signal, not "MCW".

You would need the proper code book or other decryption device to translate this into something understandable.

The big question. Is who is transmitting that and why ?

Sent from my DROIDX using Tapatalk 2

 

[unit248]

I'm not positive (I don't think anyone is), but I think the AM audio CW signal on 5800Khz is related to the alleged Cuban spy numbers station on 5883Khz. Listen to 5883 around 11PM PST (daily) and you'll probably hear it: female voice announcing 5-digit number groups in Spanish in AM mode. The transmission always starts out with the voice repeating the word "Atencion!" in Spanish a few times. Usually lasts about half an hour.

Numbers station - Wikipedia, the free encyclopedia

I think the frequency of the AM/CW transmissions varies a little. I'm pretty sure I've heard them on 5810Khz a couple times. The 'Atencion!' voice station is sometimes crowded a bit by one of the bible-thumper broadcasters a few Khz away, but is usually very strong here in San Francisco.

-Bill