Kevin Alfred Strom wrote:


It's too bad the Eton and Sony sync detectors don't provide the option
of listening only to the Q channel output. That would provide the
ability to literally listen to what was underneath any DSB/AM signal.
Some amateur experimenters have done this with homebrew gear, allowing
operation in the close vicinity of 500-kW broadcast invaders of the 40
meter band.

See the article "SSB Q-Channel Communications" for more details:

http://www.antennex.com/preview/Folder01/Nov4/ssb-q.htm


"What are the K3's binaural effects?

The K3 AFX (audio effects) creates the illusion of added space, similar
to stereo, and has user adjustable settings. The binaural mode is
similar to binaural I-Q (please see March 99 QST)."

http://www.elecraft.com/K3/K3FAQ.htm