[Elecraft] KPA500

[Paul Christensen]

> "I would also think it will be built around MRF-150 FET's?"

Four years ago, the prototype KPA800 used eight APT ARF 463 transistors 
(four per RF board).  Each plug-in board would be field serviceable.  The 
prototype KPA1500 in effect doubled the number of boards and transistors.

http://www.n6ie.com/Elecraft.html

I like "bolt-on" high-power transistors that use a small PC board slightly 
larger than the transistor for the soldered leads, then that PC board bolts 
down (e.g., using #10 machine screws) to the main RF board.  If a transistor 
needs replacement, one simply unbolts the small PCB from the main board 
without inflicting heat/shop tool damage onto the main board.

Paul, W9AC