PYE CR/AC capacitor types - UK Vintage Radio Repair and Restoration Discussion Forum

lloydwells · 10th Oct 2019, 8:08 pm

I'm not far off finishing this set however the schematic has several capacitors on it labelled as non inductive will fitting standard 630v Poly's make a jott of difference in a set of this age ( 1934)

Ed_Dinning · 10th Oct 2019, 8:09 pm

Unless they are in a tuned stage (where they probably do not need changing) there should be little difference.

Ed

Silicon · 10th Oct 2019, 9:32 pm

The PYE service manual states that C4, 5, 6, 8, 13, 17, 21 & 25 should be non-inductive.

Most of these capacitors are either HT (anode and screen grid) or AGC decoupling/bypass capacitors.

In most radios they could be replaced with ordinary polyester capacitors.

10th Oct 2019, 8:08 pm	#1
lloydwells Heptode Join Date: Aug 2016 Location: Dumfries, Scotland, UK. Posts: 549	PYE CR/AC capacitor types I'm not far off finishing this set however the schematic has several capacitors on it labelled as non inductive will fitting standard 630v Poly's make a jott of difference in a set of this age ( 1934)

10th Oct 2019, 8:09 pm	#2
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,195	Re: PYE CR/AC capacitor types Unless they are in a tuned stage (where they probably do not need changing) there should be little difference. Ed

10th Oct 2019, 9:32 pm	#3
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,167	Re: PYE CR/AC capacitor types The PYE service manual states that C4, 5, 6, 8, 13, 17, 21 & 25 should be non-inductive. Most of these capacitors are either HT (anode and screen grid) or AGC decoupling/bypass capacitors. In most radios they could be replaced with ordinary polyester capacitors.