Just flipflop the thansformer wires that go to the plates of your power
tubes.
That will fix your phase problem.

BTW, once you really start pushing the volume and overdriving the phase
inverter, the presence control really doesn't do much.



Chris Berry wrote:
Found the problem - presence was out of phase so the "replacement" isn't an
accurate Marshall replacement.
Emailing supplier for the proper spec sheet.... at least I only used a 16
ohm load on the highest impedance secondary...

cb

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