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.
That does not seem like a tube audio output transformer. Is there a brand name or part number? Do they have wires or terminals? If wires, what colors are they? Anything else you can say to describe them?
