Quote:
Originally Posted by Dave Moll
Do you mean T2 (green)? T3 is the A leg (white), without which the telephone will receive no signal. Isn't the T2 connection also needed for the speech circuit?
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Ah... See what you mean now - you're leading the plug into the telephone via the bellset. But is the terminal on which T3 connected to the bell in any way? It shouldn't be. It should go straight to the telephone speech cct.
Quote:
Originally Posted by Dave Moll
By the way, what is the electrical difference between your diagram and how my setup is wired?
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I haven't drawn yours out yet to see. I shall do, though! there shouldn't be any difference, really, all being well. Just on with another job at the mo so can't give it my full attention just yet. Try separating phone and bell and see if your resistance measurements stack up to what you expect to see on the bellset. But 1600 Ohms sounds suspiciously like a pair of bell-bobbins to me, plus carbon mic and ASTIC winding.