do class c amps varying plate- or collector-voltage ?

[BOOTY MONSTER]

i read this last year and was curious but never got around to asking . in the last paragraph here about class C amps ...... Classes of Amplifier Operation
it says ....

"However, most Class C amplifiers can be amplitude-modulated with acceptably low distortion by varying plate- or collector-voltage................ "

do any of the class c amps commonly mentioned use this design/circuit ?
its my understanding that the class C design was never intended to even be used with a modulated signal . but ill fully admit that im at least a part time idiot . lol

 

[Captain Kilowatt]

Every tube type AM broadcast transmitter operates the finals in class C plate modulated service for efficiency.You need a high powered modulator to operate along with it,in other words you need a huge audio amplifier as well as a big RF amp.For a 1000 watt carrier you need almost 700 watts of audio power for 100% modulation.In plate modulated service the audio is applied to the finals through a modulation transformer and that varying audio voltage is what causes the plate voltage to change which in turn amplitude modulates the RF carrier.Same thing applies to transistors basically except it is the collector voltage that changes.A normal class C amp meant for 11m is a differant animal altogether as it has no means of applying modulation separate from the RF signal.The article regarding class C amps you referanced above was speaking in terms of transmitters and not amplifiers.You have to modulate a class C amplifier,not use it to amplify an already amplitude modulated signal.Class C is fine for FM signals.

 

[9C1Driver]

I know the term plate voltage applys to tube style amplifiers and not transistors.