I've got a pair of mil surplus Ferrodyne 600:600 transformers that I snagged off the 'bay a couple weeks ago. One of them works fine. The other passes audio, but only when I slam it with signal, somewhere in the neighborhood of +25dBm or so for a few seconds. It's like suddenly unclogging a bathroom drain, and it will pass normal signal levels fine after that, but only for about a day or so and then I have to do it all over again.
Is this a common symptom with open windings? When it's not working, I'm measuring an open circuit with the DMM. After it starts working, DCR matches what I'm reading on the other (working) transformer.
Is this a common symptom with open windings? When it's not working, I'm measuring an open circuit with the DMM. After it starts working, DCR matches what I'm reading on the other (working) transformer.