Thread: Tester AT 4557
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Old 14th Mar 2019, 9:12 am   #3
Dave Moll
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Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,130
Default Re: Tester AT 4557

If you're a member of THG*, there is a circuit diagram on their (members-only) resource section.

*If you're not a member, I definitely recommend it if you are serious about old telecommunication equipment.
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