• 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.

Using Toroidal PTs as tube OTs - methods and sources

I have a question - has anyone formed a preference for which core material they use when making toroidal output transformers?
I see MPP are “up to 10KHz” and then ferrite up to 1MHz (ie 1.2-1.3 for example) then powered iron above that.

I see you can design for a frequency range but theres a bit of experience in getting the best winding/insulation configuration for the frequency range.

B=Erms/(4.44NfAx10^-8) should say if it’s going to saturate.
 
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