• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Advanced issues in audio transformers.

All secondaries in parallel

I find this topic yesterday and have been very interesting, thanks for your contribution.



I think that to have the secondary the most balanced between layers, is bi-wired

all secondaries and alternate from the up to down



This is the idea for my 300b modest OPT:
An externally hosted image should be here but it was not working when we last tested it.