04-09-2018, 05:53 AM
Hi there,
I am working on a Philcophone Intercom set . It goes (now!) and uses 2x 6B7s a 6V6 and a 6X5. The "quiet listen talk " lever switch was broken and I have removed it but in so doing I found I had a spare wire. I traced this back to the output transformer which has three wires leading from it instead of the more usual two. I say it goes and it does, being really only an amplifier with a couple of switches, and using crocodile clip leads as switches I can get it to work as an intercom and I am installing a new lever switch intending to use it as a two station master and slave set between the kitchen and my radio shed .
But that third lead on the output transformer intruigues me . I am wondering if it is part of a "call the master station " facility so the slave station can call the master to initiate a conversation. Does anyone have the schematic or can anyone tell me where to look to find it?
Cheers and thanks to all,
David Fahy
I am working on a Philcophone Intercom set . It goes (now!) and uses 2x 6B7s a 6V6 and a 6X5. The "quiet listen talk " lever switch was broken and I have removed it but in so doing I found I had a spare wire. I traced this back to the output transformer which has three wires leading from it instead of the more usual two. I say it goes and it does, being really only an amplifier with a couple of switches, and using crocodile clip leads as switches I can get it to work as an intercom and I am installing a new lever switch intending to use it as a two station master and slave set between the kitchen and my radio shed .
But that third lead on the output transformer intruigues me . I am wondering if it is part of a "call the master station " facility so the slave station can call the master to initiate a conversation. Does anyone have the schematic or can anyone tell me where to look to find it?
Cheers and thanks to all,
David Fahy
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