Re: Field Telephone Type F Mk II - Help needed
For what it's worth, I have acquired a couple of original Tele F wooden carrying boxes, and coincidentally I fitted the phones into the boxes earlier this evening! All I need now is some proper webbing carrying straps...
If all the rest of the circuit checks out for continuity, I agree that C2 could be open-circuit. You'll probably obtain a suitable replacement from Maplins; 2.2uF will be fine. They sell these for audio applications.
Regarding the carbon mic inserts, someone once advised me that these can absorb atmospheric moisture through the little pressure-equalisation hole behind the diaphragm, and gentle warmth from a radiator or airing cupboard for a few days might dry it out and evaporate the moisture. It didn't help in my case, and I managed to find another insert that was better.
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Phil
Optimist [n]: One who is not in possession of the full facts
Last edited by Phil G4SPZ; 7th Sep 2009 at 9:27 pm.
Reason: Comment added
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