HankG wrote:

Heard an encrypted message on 111.75 @ 21:20 z. First heard some tones
going back and forth. Never had heard them before. Then heard some short
transmissions and what sounded like a test count (1,2,3,4,5--5,4,3,2,1).
Tried twidling the (electronic) knobs. No Joy.

HankG

Many times you'll hear what is known as an EAM on 11175. What is an EAM?:

http://www.wunclub.com/files/eam.html

For more info on 11175 and other frequencies see:

http://www.wunclub.com/files/mla.html

All that and more from:

http://www.wunclub.com/

dxAce
Michigan
USA

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