FI Drive Transistors

[Rob Weinstock]

What seems to be the preference for devices? EGBT's, MOSFET's, BJT's, etc.? 
What are the typical device ratings?

Is there any demonstrable benefit with using matched devices?

Has anybody tinkered with power supply improvements, or with snubbers?

Thanks for your help -- I'm new to this list.

Regards,

Rob Weinstock
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