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One of the 12AX7s is in the sidechain, I would not change that one. But the 12BH7 is in the signal path and an upgrade is of benefit, IMO.Convention is that pin 2 is hot. Your wiring seems fine to me. You could try to also connect pin 1 to sleeve on in / out or both if there is hum or RF interference.-10dB should be fine, you just need to adjust the gain accordingly.I should have measure when I had mine open, but all the caps are high voltage parts and there is no point in using those and the elaborate PSU if you are going for starved plate. It certainly does sound like a proper high voltage circuit.They try to prevent people from opening it by using different torx screws for which the typical consumer probably has no bits lying around. And I think with today's consumers it is assumed that they do not open equipment and start working on it. There is dangerous high voltage in many non-tube devices, too.
One of the 12AX7s is in the sidechain, I would not change that one. But the 12BH7 is in the signal path and an upgrade is of benefit, IMO.
Convention is that pin 2 is hot. Your wiring seems fine to me. You could try to also connect pin 1 to sleeve on in / out or both if there is hum or RF interference.
-10dB should be fine, you just need to adjust the gain accordingly.
I should have measure when I had mine open, but all the caps are high voltage parts and there is no point in using those and the elaborate PSU if you are going for starved plate. It certainly does sound like a proper high voltage circuit.
They try to prevent people from opening it by using different torx screws for which the typical consumer probably has no bits lying around. And I think with today's consumers it is assumed that they do not open equipment and start working on it. There is dangerous high voltage in many non-tube devices, too.
