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RE: power transformer design questions or call it debate .

Determine the class the amp will operate in.
Measure the class A(mA) and when/if it hits class B(mA).
Add the FE tubes with the class A total.
From there you can work some calculations on the mA size of the PT - Class A + peak, 50% to 70%.
If you go 2x, how will you hit the desired B+?
If it's a preamp typically they run Class A.
I would run the calculations, M6 lams and send it off to Jack Elliano for the build.:-(


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