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ms660 · 2nd Jan 2017, 10:26 am

So far as I can make out it's C220 (25pf-300pf) Haven't studied its function in detail but it looks like its part of a tuned filter circuit.

It's a wire type variable capacitor, the inside of the ceramic tube will have a metalized film inside which is one plate, the wire wrapped around the outside being the other plate, the number of turns of the wire being the adjustable bit.

Lawrence.

2nd Jan 2017, 10:26 am	#25
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Tandberg Huldra 8 valve failure So far as I can make out it's C220 (25pf-300pf) Haven't studied its function in detail but it looks like its part of a tuned filter circuit. It's a wire type variable capacitor, the inside of the ceramic tube will have a metalized film inside which is one plate, the wire wrapped around the outside being the other plate, the number of turns of the wire being the adjustable bit. Lawrence.