[Amps] multiple supplies in series

[Jim Tonne]

John Lyles wrote in part:

> The Continental supplies do this, and also can switch on and off 
> at 70 Khz or so, so as to be able to recreate audio voltage at the 
> anode of a PA tube.This does high level plate modulation. 

Actually they don't all operate at 70 kHz.  The end result is as you
describe but each individual switch operates at 70 / 48 kHz.  This
allows the use of switches that have a relatively long on-off time.
They "rotate" as you describe in your unit.

- Jim WB6BLD