Seems to be a vy strong S9 AM carrier here lately
....73,s Marcy
....73,s Marcy
Have heard a numbers station on there befor around noon time cst here in TN.Very strong signals !
Interesting... I left it on most of the morning. It was a pure unmodulated carrier for quite a few hours. But at 19:00 UTC, I took a look and noticed that it had turned into what sounded like very high speed RTTY. (had to switch from AM to CW to copy it). -- Sample attached below.
It's been maintaining S9 with a few fades to S5 pretty well all day..
OK.. Thanks for the ID.. Not used to hearing the 850 Hz shift. (Normal ham RTTY is 170). Out of interest, it's well after dark here and the station is still pounding away. But now, it's only S4.. Just above the noise.
And.. I did a quick Google search and found this page with some good audio files for identifying RTTY sigs.
Radio Teletype (RTTY) - Signal Identification Wiki
RTTY (Also known as Baudot or ITA2) uses the Baudot 5-bit alphabet with FSK to send text messages over the shortwave. This mode is gradually dying out in favor of more robust modes like PSK31 in the amateur service.www.sigidwiki.com