Quote:
Originally Posted by Alf
Are they compatible with each other?
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As long as the signalling circuit works, then yes. You can only call a type F from a type D using DC signalling (buzzer). But you can call a type D from a type F using either buzzer or magneto, because a D has a magneto bell as well as a buzzer.
You can call any magneto telephone from any magneto telephone, and you ought to be able to speak, as the mic circuitry is internal to the telephone, being presented as an AC voice signal at the terminals (or should be). Chech that there's no DC at the terminals when the handset is lifted and / or the pressel switch is made.
A Soviet TAI-43 will work satisfactorily with a UK / Commonwealth type F, I've found.