Class E amps and PWM

Just finished listening to SolderSmoke #39 (another sterling effort).
Bill Meara, M0HBR wondered if AM types might be into PWM (Pulse Width Modulation).
I remembered a presentation I saw at Boxboro a few years ago.
At least some AM types are into PWM!

Take a look at:

http://www.classeradio.com/

and

http://www.classeradio.com/modulate.htm