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Old 14th Jan 2021, 4:52 pm   #147
TerryB44
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Join Date: Mar 2013
Location: Liverpool
Posts: 102
Default Re: Grundig TK20 and Truvox R82. Help Required Please.

I think you're probably right regarding the Mk2 thing. Even the head assembly is totally different to the later version. Assuming we're right about the motor then, how is the speed controlled, or is the motor a constant speed one? I assume it is because it has a stepped pinion on to which one of two idler wheels contacts depending on the speed selected. If the motor varies its speed is this likely to be motor fault, which of course would mean a lot of dismantling which I think is out of the question, even assuming I could get a motor! There's something not right with those wire wound resistors too; they're listed as 3k and 4k but when I measured them they were only 400ohm! I'll double check that though!
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