Quote:
Originally Posted by Tim Bell
Does anyone have one of these Tannoy Transformer sockets they are happy to sell me please?
This pic is from the inside of Cobbaton's Churchill (thanks Tim Isaac!)... however, the same fitting also exists in Bovington's Firefly.
I am assuming it is a WW2 fitting - not a post-ww2 modification.
Am not sure why there would be a need for a separate powered mic, rather than one on the loom with the headset... if anyone knows, I'd be most interested to know please.
Tim
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It's the Emergency Crew Communication System, and allows the commander to talk to the crew even if the intercom amplifier has failed or is switched off (as long as there is still battery power to the transformer, of course).
The box contains the microphone transformer for the power microphone, possibly a resistor if it's a 24-volt unit that used the same transformer as the original 12 volt ones, and has a 3-wire cable to the vehicle junction box. (+12 volts, Ground, and 'Speech' (i.e. the crew intercom circuit).) They were designed to provide the same output as the WS19 intercom amplifier.
As far as I know they (or a slightly more modern equivalent) are still fitted to more recent vehicles. (I have a 24-volt one with 6-pin connectors from the 'New Range' era.)
Chris.