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Re: [VHFcontesting] trimmer caps

To: VHF Contesting Reflector <vhfcontesting@contesting.com>
Subject: Re: [VHFcontesting] trimmer caps
From: Zack Widup <w9sz.zack@gmail.com>
Date: Sun, 3 May 2009 09:58:51 -0500
List-post: <vhfcontesting@contesting.com">mailto:vhfcontesting@contesting.com>
Hi John,

Yes, I've eoncountered that before and the caps still worked OK. The missing
pieces may affect the mechanical stability but it might not be a big deal
for your usage.

73, Zack W9SZ

On Sun, May 3, 2009 at 7:23 AM, John D'Ausilio <jdausilio@gmail.com> wrote:

> building up some DEMI preamps, and all the through-hole 1-6pf ceramic
> trimmers seem to be defective (or maybe not?) .. the top plate is
> generally a full disc which is partially coated with conductive stuff,
> on all three of these trimmers the non-conductive portion cracked into
> multiple pieces and fell out as soon as I tried adjusting the cap.
> Closer inspection shows that the essential pieces (top and bottom
> plate) appear undamaged and the piece that self-destructed is not
> electrically important to the functioning of the cap .. is that really
> the case?
>
> de w1rt/john
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