• 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.

Does anyone have the PDF for the Plitron 4142 ?


Trying to finish up a very OLD project that has been collecting dust since i left the hobby. Its a Williamson amp based on the Plitron 4142. The problem is my schematic the OPT is numbered, but I have no clue what colour wire is what number. The amp is basically finished but I want to double check everything. And if these colour wires are swapped my NFB becomes PFB.

Thanks for any help you guys can provide.