Re: Capacitor test results

To: tesla-at-pupman-dot-com
Subject: Re: Capacitor test results
From: Jim Fosse <jim.fosse-at-bdt-dot-com>
Date: Mon, 10 Jun 1996 01:08:54 GMT

On Sat, 8 Jun 1996 22:25:02 -0600, Tesla List
<tesla-at-poodle.pupman-dot-com>, you wrote:

>>From ed-at-alumni.caltech.eduSat Jun  8 21:42:53 1996
>Date: Sat, 8 Jun 1996 17:02:45 -0700 (PDT)
>From: "Edward V. Phillips" <ed-at-alumni.caltech.edu>
>To: tesla-at-pupman-dot-com
>Subject: Re: Capacitor test results
>
>Re: Current from "30 ma" neon transformer
>	The rated current is with a RESISTIVE load!  With
>a capacitive load the current will be higher, because the
>capacitive reactance cancels part of the inductive reactance
>of the transformer.  The approximate reactance of the transformer
>is 12000/.03 = 400,000 ohms.  Subtracting 106,000 you get
>294 k.  The net current is thus 41 ma, and the voltage 
>across the capacitor should reach around 4300.  Surely enough for
>a test.

Ed, 
	I have to disagree with the 4300 volts being enough to test
with. The pig that I am trying to use, has a 65:2 setup ratio (I
measured with 110V into 1/2 the lv side). With 220V in to the full lv
side I get 7.15kV. I've found it very difficult to get gaps to fire at
this voltage level. Note: with 1/2 of my 60ma 15Kv neon and 13nf of
cap, the gap fired much more readily, probably due to 60 Hz resonance
voltage rise.

	Concerned,

	jim