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Old 10th Nov 2021, 7:07 pm   #25
DMcMahon's Avatar
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 4,987
Default Re: Grundig TK27 - Low audio output

Well done on getting the low volume sorted. I have previously spotted the difference in the spacer lengths before. On the older similar TK series (like TK 23) the spacers are metal and are the same length plus secured with screws. On the TK 27 they are plastic and secured by nuts, the left white ones are around 5mm and the right hand side black ones around 7mm long.

This difference in spacer length is due to the metal screening cover on the TK 27 being profile shaped on the left hand side to be around 2mm closer to the PCB, so to keep all of the metal cover parallel with the PCB the difference size spacers are used, no idea why the cover is profiled, it is just flat on the previous similar TKs.

Maybe when you had your spacers incorrectly fitted it allowed the cover to short to something on the PCB, the cover is earthed through the mountings.

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