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Hey Dave. I just replaced R12 in the circuit to 12K to ensure 2mA current in my 12ax7 cathodes and it works. The rest of the circuit is identical. -50V well filtered, not regulated was used. I saw in other thread you taking about thermal stability. What about it ? Should I replace R10/C3 with a 24V zenner diode to ensure consistent voltage in to the base please ? Thanks.
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Last edited by catalin gramada; 01-31-2023, 07:03 AM."If it measures good and sounds bad, it is bad. If it measures bad and sounds good, you are measuring the wrong things." -
Sorry, I don't remember talking about thermal stability but I'm sure it will be fine as it is without the zener.Originally posted by catalin gramada View Post
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It works fine, the outputs are perfect balanced. This is the circuit I did. Thanks for helping.Originally posted by Dave H View Post
Last edited by catalin gramada; 01-31-2023, 09:24 PM."If it measures good and sounds bad, it is bad. If it measures bad and sounds good, you are measuring the wrong things."Comment
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