Re: cheap way to test "doorknob" capacitors? (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 11 Nov 2004 09:49:38 -0800
From: Ed Phillips <evp@xxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: cheap way to test "doorknob" capacitors? (fwd)

"  Also: I have seen standard barium titanate doorknobs used as tank 
circuit caps in RF induction furnaces, diathermy machines, and in tuned 
filter stages of radio transmitters.  How could that be if their 
capacitance varies with applied voltage?"

	All depends on what you mean by "standard".  You're talking here about
RF capacitors specially designed for that purpose.  They're larger and
much more expensive than the equivalent capacitance/voltage in filter
capacitors.

Ed