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Re: [TowerTalk] RG-58 capacitor

To: towertalk@contesting.com
Subject: Re: [TowerTalk] RG-58 capacitor
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Mon, 26 Jun 2017 14:39:01 -0700
List-post: <mailto:towertalk@contesting.com>


On 6/25/2017 3:52 PM, Tom Osborne wrote:
Hi All

This might seem like a silly question, but is it possible to make a 150pf
capacitor out of RG-58?  Thanks and  I need one for an EFHW I am building.
  73
Tom W7WHY

Possible?  Yes.  Advisable?  Not so much.  A capacitor made that way
will be fairly low Q (ie lossy).  Also, its effective capacitance
will vary with frequency in such a way as to reduce the bandwidth
of the match.  I'd rather use a doorknob capacitor.

Rick N6RK
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