Leonard Kahn still has a holdout, too: 1600 WWRL is transmitting Kahn Power-Side on the upper sideband, with the 15 Hz Kahn/Hazeltine AM Stereo pilot tone.
I love it when you talk dirty.
I am a fan of the Kahn system. It works and it works well. It has more range than C-quAM and great for dx-ing.
It was, and still is, the "natural" AM Stereo system.
I had it in my car and home. I was able to record air checks from both.
It would be interesting to see what would happen if every station which had Kahn, turned them on. Powerside counts because they each had a switch for upper, lower, and stereo.
Jeff in Sa-ra-so-ta!