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    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Identify unknown output transformer

Hi All,

Decades ago I received a homemade vacuum tube audio amplifier from an engineer. I recall our discussion that the output transformer was a "high quality from Germany". I have no information besides its inscription of M85/29 and that it has taps for el34/6ca7 tubes. Can someone please identify it?

Any information is appreciated.

Michel
 

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