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Old 14th Nov 2017, 7:47 pm   #25
russell_w_b
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Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
Default Re: GPO 332 transmitter issue

Quote:
Originally Posted by ThePillenwerfer View Post
Configured as it is in the photos that will be the resistance of the receiver.
I believe Bigus rewired the handset at the telephone terminal block as I suggested in post #10 (he may have put it back, of course) So I'd disconnect the handset from the telephone terminal block, leave the dial disconnected and chase for 150 ohms round the loop from across terminals 4&5.

If you get a resistance here, then there's your fault. You may need to snip one of the wires to the 0.1uF cap as they're soldered on. It's not unknown for wires to snag and touch at switch contacts or the ASTIC.
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