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RE: Reviving Solid State Equipment

66.85.230.171

In Reply to: RE: Reviving Solid State Equipment posted by DIY John on June 15, 2022 at 13:11:21

Thanks for all the responses.

It sounds basically the same as what I do for tube equipment. I probably go much slower in raising the variac voltage than most, maybe 10V/hr.

My concern with transistors is that they are relatively fragile compared to tubes and I don't know if bias being off because of reduced voltage might cause problems. I just don't have much experience with it. I guess if doing it monitoring emitter current as TK suggests, that might take care of most of it. And maybe I should be going faster to raise the voltage.

Follow Ups:

Well the Sony V-FET amps will respond very badly to using a variac or - kff 07:31:15 06/16/22 (0)
dim bulb. they are the only pieces of gear that I have read a warning about.
RE: Reviving Solid State Equipment - Story 04:03:37 06/16/22 (0)
the risk is if the voltage is regulated anywhere because it might not turn on until it reaches a threshold. I've monitored current and voltage with a variac and meter before and turned it up within maybe a second or 2 to 90vac to 100 and monitored results that way with dummy loads on the speakers attached.

If I'm wrong someone please chime in and correct me

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