>> What would you want to do with a 200 amp variac ? I am dreaming of a 21KW class-e 160m amplifier. (Assuming the variac is 140V, and the efficiency is about 85%. NOW to go dig up a mythic MOSFET. 73, George K. Watson K0IW -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com