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Headphone/microphone hearness for # 19
I am trying to test out old dried up spare headphone sets and hopefully understand how they work.
I need a schematic of the wiring as I am totally frustrated. I have rigged up an old transistor radio to provide the suitable signal from the earphone jack. My frustration is that I can make the earphone work if I connect directly to the earphone contacts but cannot make them work from the brass contacts on the rubber snatch plug. There are 5 wires in the loom .... black-white-red-blue-green...... I suspect one wire does double duty or something..... Black goes from snatch plug to one connection on the earphone(1) them doubles back to the microphone. A blue goes from the other connection of the same earphone(1) to the other earphone(2)... the other contact of earphone(2) is green........ but if I apply power/sound to the black and green wire of the snatch plug it does not play. To the microphone goes 4 wires.... white-red-black and blue..... Or am I going cross eye and colour blind.... Bob C. a.k.a sparky on training wheels.
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Bob Carriere....B.T.B C15a Cab 11 Hammond, Ontario Canada |
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