Short Wave Listening (SWL): Various frequencies which seem to always carry data

Modulation / mode: RTTY?

Frequency (kHz)   Comments
---------------   -----------------------------------------------------------------------------
4987.5            FSK/RTTY? Never stops, extremely strong signal
5340.0            FSK/RTTY? Never stops
6358.5            FSK/RTTY? Short idle periods between data (5-10 seconds idle, then more data)
6487.5            FSK/RTTY? Never stops, extremely strong signal
7458.5            FSK/RTTY? Never stops, extremely strong signal

See also:

http://ik4hdq.net/doc/mil-hf.html
http://ik4hdq.net/doc/0to5MHz.htm
http://ik4hdq.net/doc/5to10MHz.htm
http://ik4hdq.net/doc/10to30MHz.htm

CREATED 2023-04-02