[Lowfer] Vacuum Var C Help ?

Mon, 26 Jan 2004 10:50:28 -0800

<http://www.surplussales.com/VaccumVarCaps/VVC5.html> and
<http://www.surplussales.com/VaccumVarCaps/VVC13.html> show some pictures
good enough to get the idea.  And prices<G>

Sometimes the flash of light, but often the repairing of the power supply.

I suspect it is more the minute dust and water molecules that cause the
problem.  Dry clean air is a pretty good insulator also.

Gary WA6DTX
----- Original Message -----
From: "Peter Barick" <[email protected]>
To: <[email protected]>
Sent: Monday, January 26, 2004 9:46 AM
Subject: [Lowfer] Vacuum Var C Help ?

>
> How is a Vacuum Variable Cap tuned, ie, how is the vacuum maintained
> while the rod or shaft is actuated? Is a diaphragm used with the
> actuating rod on one side and the vari stuff on the other?
>
> Further - are they prone to leakage over time? Then how tell?
>
> Peter
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