Rick KB1KIL wrote:

Listening to that frequency now at 12:56 and it's 2 alternating tones.


Most likely it is NMC or one of the other coastal stations letting their SITOR
transmitter idle, just sending those tones, either as a test, or just a marker
on the frequency.

Steve
Holland, MI
Drake R7, R8 and R8B
"I swear by, not at, Drake receivers" ©

http://www.iserv.net/~n8kdv/dxpage.htm