On 8/9/2014 2:38 PM, Brian Carling wrote:
So maybe the Hercules can be converted to use MOSFETs. Seems like it should be
possible.
What causes you to say that? Have you designed and built solid state RF
power amps? Have you studied the design of RF power amps? Theoretically,
ANYTHING is POSSIBLE, but what is PRACTICAL? Do substitute devices fit
mechanically? What about impedances and drive levels? What about bias
and supply voltages? What about cost?
The 444 was designed around specific devices that Motorola decided 30+
years ago were not practical, and they felt strongly enough about it to
leave mfrs like Ten Tec twisting in the wind. And Ten Tec chose to cut
their losses and do something different (the Herc II).
73, Jim K9YC
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