Some help from other members would be greatly appreciated. I have a Bottlehead Foreplay preamp that I could substitute for the PAT4. Other than that, I don't know where else to start looking for the solution.
Many thanks in advance.
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sKiZo wrote:Every tube will bias up a little differently ... With a new tube, I set it to spec once it's warm, then again after playing it for a bit, then let it idle a while and check it again. You may see some small variation, but it should stabilize after a few hours at most. After that, the occasional spot check is always a good thing.