RE: Wnen is a cap too large?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Vanderputten, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gvp-at-pvaintl-dot-com>



 -----Original Message-----
From: 	Tesla list [mailto:tesla-at-pupman-dot-com] 
Sent:	Tuesday, June 11, 2002 9:56 AM
To:	tesla-at-pupman-dot-com
Subject:	Re: Wnen is a cap too large?

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<rheidlebaugh-at-zialink-dot-com>

Gary: You have said the size of your capacitor, but nothing agout your coil
size. The secondary coil sets your frequency. The primary is adjusted with
your capacitor to match your secandary frequency. With no information about
your coil size no one can help you. What frequency are you working with ?
The lower your frequency is the larger the capacitor you can use. The higher
your frequency the smaller the capacitor you can use.
   Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Mon, 10 Jun 2002 11:44:11 -0600
> To: tesla-at-pupman-dot-com
> Subject: RE:Wnen is a cap too large?
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Mon, 10 Jun 2002 11:48:14 -0600
> 
> Original poster: "Vanderputten, Gary by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <gvp-at-pvaintl-dot-com>
> 
> 
> 
> 
> I have one of these caps  that are being sold on ebay :
> http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&item=1738855045.
> 
> It is a 25kv .25 mf cap. On my cap meter it checks our at .245, and
trickles
> well when charged a bit.
> 
> I have a small 1.5 x 10" coil which uses 5kv x 50 ma and a .1 mfd 10kv cap
> which works well for its small size, I also have a 750w 12/60 rig with a
> 3.5" x15" coil and .0666 mfd x 30 kv MMC which screams. I substituted the
> new cap on both rigs and  get nothing. No smoke or heat either. Almost as
it
> has a short or disconnect. Continuity check is negative, but that's
correct
> for caps. No ohm reading as well.
> 
> I know that according to the coil calculators I have used this cap is way
> above recommendations.
> 
> Could the cap still be bad?  What other tests could I perform on it before
> using it as paper weight? Or are my rigs just too small to power it?
> 
> Gary
> 
> 
> 
Robert H:

Let me elaborate. Coil description:
> I have a small 2" X 10" Secondary made with 28 awg wire, a 10 coil 5"
helical primary made from 1/4" copper tubing (tuned currently at 5-6 turns),
and RQ gap, two 5kv/25ma nst's wired in parallel, and a .01 mfd 10kv cap.
This unit which works well for its small size,
* 
 I also have a 750w 12/60 rig with a 3.5" x 15" coil  made with 28 awg wire
and a flat 15 turn primary of 1/4" copper tubing tuned at 12 turns and
.00666 mfd x 30 kv MMC. The coil performs very well.

I substituted the new cap on both rigs and  get nothing. No smoke or heat
either. Almost as it has a short or disconnect. Continuity check is
negative, but that's correct for caps. No ohm reading as well.

Gary