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[AMPS] Phantom Capacitor

To: <>
Subject: [AMPS] Phantom Capacitor
From: (km1h @
Date: Thu, 26 Mar 1998 22:19:21 EST
On Fri, 27 Mar 1998 02:17:35 +0000 W7CW Jay E Ostrem <>

>The question.
>Which of these methods, or other methods would constitute good 
>practice for building a band switchable network?  (how are the big 
>doing it?)
>                              73 Jay W7CW

The only sensible way is a vacuum variable. 
7 to 500pf at 10Kv is a common value.

For 10M you can experiment with the L but it may be necessary to center
tap the 10M L which will  quadruple the C required....thats an old
commercial amp trick. 

GL  Carl  KM1H

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