Quote:
Originally Posted by polyphase
Audio transformers, at least in my experience, have been the major issue in getting these sets working.
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Heard it said that, of all things, ringer modules from old fashioned Ma Bell telephones can be substituted for these transformers. Seems that the ringer has a pair of windings, which can be repurposed to become a primary and a secondary. And possibly the bobbin holding the windings can be inserted into the old transformer laminations, if you're lucky.