Tube DIY Asylum

RE: BDT Preamp Schematics

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John,

On the transformer issue, I have an important question: does the primary of the transformer carry any DC current or it behaves like a PP output transformer with the DC currents in opposite directions and cancelling each other? In other words, do I have to calculate the Tx with an air gap or with interleaved laminations?

Regards,
Evangelos



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