[Amps] Time to back up- SS and autotune

[qrv at kd4e.com]

Bill,

Would you please explain this a little more?

I am having trouble getting my head wrapped around

"... a bunch of 250 watt modules which were combined
and switched in and out at an audio rate to produce
the modulation"

Just getting to my first cup of coffee ... and that's
my story and I'm stickin' to it.

Thanks - David KD4E
>> it's "relatively easy" to parallel properly designed circuits through
>> properly designed combiners for the power to be run that give excellent
>> linearity, rugged with minimal protective circuitry, and good efficiency
>> at a reasonable heat load that is easy to get rid of.   (QUIET!)
>
> REPLY:
>
> A little OT but not much:  Several years ago I was fortunate enough to
> get a tour of KFI, the AM broadcast station in Southern California.
> They were running a Harris DX50 transmitter which was all solid state
> and produced 50 kW output. It uses a bunch of 250 watt modules which
> were combined and switched in and out at an audio rate to produce the
> modulation. No separate modulator.
>
> Just shows what low power amps with combiners can do.
>
> 73, Bill W6WRT