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Old 15th Nov 2017, 2:57 pm   #48
russell_w_b
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Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
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Default Re: GPO 332 transmitter issue

Quote:
Originally Posted by bigus01 View Post
Measures the same 22 ohms.
With the handset still disconnected, could you measure the resistance:-

Between terminals 5 and 6 on the telephone terminal block? Should be something like 105 Ohms on and off hook.

Between terminals 6 and 11 on the telephone terminal block? Should be something like 132 Ohms off hook and open-cct on hook. You may need to squeeze the switch-hook contacts together gently for this one: it will show you if they need cleaning!
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