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Old 17th Mar 2017, 5:24 pm   #22
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
Default Re: GPO Jack unit 1B

This is probably more than you want to do, but if it were mine...

I'd start by removing the PCB so I could see both sides. Then I'd trace out the connections. It's going to be based on the 746 circuit (the induction coil, rectifier stack (the green thing with 9 connections), regulator lamps and R's and C's look to be the ones found in a 746), so N846 is going to give you a clue. Be warned that the induction coil pins are not numbered in any logical pattern, there are 6 pins, one is not used, they are numbered 1-5 on the N diagrams, but it's not 'down one side and up the other' or anything logical on the actual coil. I think it would take me about an hour to do it, but then I've done this sort of thing many times...

Having then got an accurate circuit for the Jack Unit, I think it will be quite easy to see how to connect it up.
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