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Sparks · 28th May 2020, 8:53 pm

I'm afraid I haven't a clue. I just put wires and straps and things where the experts tell me. The circuit board in this jack is largely based on that of the 746 telephone, but I've never seen this regulator in a 746, unless it has a different design.

28th May 2020, 8:53 pm	#9
Sparks Heptode Join Date: Oct 2006 Location: Leeds, West Yorkshire, UK. Posts: 598	Re: GPO Jack unit 1B and regulator 6B I'm afraid I haven't a clue. I just put wires and straps and things where the experts tell me. The circuit board in this jack is largely based on that of the 746 telephone, but I've never seen this regulator in a 746, unless it has a different design.