Hi I am new to tubes and this hobby, I read somewhere autobiasing is a gimmick, I was wondering how accurate it is. Is it possible it could be inaccurate? Is there a way to test its accuracy. Also what tube tester is good for beginner.
Does manual biasing always drift over time? So the amp is always slightly off without auto-biasing. So this could be very tube depended. Some output tubes can last quite a while without drifting while other change on a weekly or monthly basis.
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