K7ITM wrote:
. . .
In Class C, the active device is hard-on for a relatively small
fraction of the cycle. It always drives the output to about two times
the supply voltage, peak to peak, if it's properly designed for low
dissipation in the active device. . .

I've designed saturating RF amplifiers of a few watts output in which
the device is on for well over half the cycle, and which have an
efficiency of around 90%. The peak-peak collector voltage is nearly 40
volts when run from a 12 volt supply. The high efficiency implies
relatively low dissipation in the active device. But perhaps this falls
outside some definitions of class C.

Roy Lewallen, W7EL