UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Variable Capacitor

DonaldStott · 6th May 2021, 12:38 pm

With my loupe I've checked that the rotating vanes all sit centrally relative to the static vanes and that there is no play on the shaft.

No obvious problems with the grounding springs either.

Using my cheapo MK-328 tester I'm measuring 537pF when fully open and 1095pF when rotated to fully closed/engaged.

I'm tending towards gunk, rust or other debris so a fine spray of IPA may help?

6th May 2021, 12:38 pm	#13
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,848	Re: Variable Capacitor - Scratchy With my loupe I've checked that the rotating vanes all sit centrally relative to the static vanes and that there is no play on the shaft. No obvious problems with the grounding springs either. Using my cheapo MK-328 tester I'm measuring 537pF when fully open and 1095pF when rotated to fully closed/engaged. I'm tending towards gunk, rust or other debris so a fine spray of IPA may help? __________________ BVWS Member Last edited by DonaldStott; 6th May 2021 at 12:59 pm.