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Old 9th Jan 2021, 3:57 pm   #115
Boulevardier
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Join Date: Sep 2017
Location: Bristol, UK.
Posts: 1,657
Default Re: Grundig TK20 and Truvox R82. Help Required Please.

Quote:
Originally Posted by ms660 View Post
Quote:
Originally Posted by TerryB44 View Post
I have disconnected the playback head completely and the hum is no different and behaves in exactly the same way when speed is changed. Would this elimate the head as the problem with regard to hum?
Open circuit (ignoring the 2.2meg) grid circuit = hum.

Lawrence.
If you want to be absolutely sure, try connecting together the two points from where you disconnected the lead leads. Hum should vanish completely.

Mike

Last edited by Boulevardier; 9th Jan 2021 at 4:22 pm.
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