On a sunny day (23 May 2006 04:34:52 -0700) it happened "Telstar Electronics"
wrote in
.com:

Jan, please contact us when you have a working prototype.

Why do you not use the one from
http://www.netway.com/~stevec/ham/pd...lid_state.html

and pay the guy something for his design?
You can then use a FET (at the higher voltage) for the RF power stage.

I, myself have a Ranger RCI-2970, so am in no hurry to build something
atm.
But I would help you with the design for fun.
Dunno everything, but I did my thing to 500W in the past.

The reason of all this, is, that when I look at you power amp,
(and the Ranger also has this rather large 'cooling block' at the bottom),
those huge fins say: Waisting Power.
Any watt dissipated is a watt not transmitted.

I think I can do this thingy for AM, CW or course, and likely DSB..
For SSB things would be more complex, you need 2 DSB versions, and the
audio / RF 90 degrees phase shifts.

But it would be SSB class D + C :-)