[TCML] Extremely cheap (surplus?) doorknob capacitor source?

[Roger Smith]

Hi Chris.   I have had good luck with wine bottle capacitors for a VTTC 
that has a plate voltage of 4000 volts.  If I remember right their 
capacitance was about 1000pf each.  They could be used in a CW multiplier 
but they are hard to insulate well.  Corona losses get really bad up around 
100,000 volts.

     Although the (Lin Ac) is quite an ambitious project it should be a lot 
easier to build now than it was back in the day when Scientific American 
published their article in the Armature Scientist section.  For one thing 
you can use a silicon based pumping fluid in the diffusion pump that doesn't 
require a cold trap.  No need to have all that mercury.  Good luck.

Roger

----- Original Message ----- 
From: "Christopher Karr" <chriskarr4 at hotmail.com>
To: "Tesla Pupman List" <tesla at pupman.com>
Sent: Friday, April 16, 2010 10:49 PM
Subject: [TCML] Extremely cheap (surplus?) doorknob capacitor source?



Hello everyone,

I am currently looking for a cheap source of doorknob capacitors rated at 
from 10KVRMS to 20KVRMS (15- to 30-thousand volts peak-rated) at the highest 
value possible, though at the lowest price possible. The intended use is, 
primarily, a VTTC, though a CW multiplier is also being designed for the 
purpose of building a home-brew, linear particle accelerator (LinAc).

I am sixteen years old, low on funds, and looking for values on the order of 
a nano-Farad or two per capacitor. My price-ceiling is quite low, sadly: 
$100 in total; payable by PayPal or cash-transfer.

To be honest, I know that there are few sources of doorknob capacitors in 
somewhat-large volume for this price, though I am optimistic and shall 
remain that way.

Thank you for all of your help, past and present,

 - Christopher Karr

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