UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Grundig TK20 and Truvox R82. Help Required Please.

DMcMahon · 7th Jan 2021, 3:44 pm

With PB head wiring disconnected use a DVM (ideally with a low value resistor in series) to measure the resistance of the head. This could (but in my experience normally does not) partially magnetize the head (if head not open circuit) then possibly later requiring the head to be demagnetized later for best HF reproduction.

David

7th Jan 2021, 3:44 pm	#87
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,600	Re: Grundig TK20 and Truvox R82. Help Required Please. With PB head wiring disconnected use a DVM (ideally with a low value resistor in series) to measure the resistance of the head. This could (but in my experience normally does not) partially magnetize the head (if head not open circuit) then possibly later requiring the head to be demagnetized later for best HF reproduction. David