Re: Variac arcing = kickback? (fwd)

---------- Forwarded message ----------
Date: Thu, 15 Jan 1998 16:17:18 EST
From: Mark S Graalman <wb8jkr-at-juno-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: Variac arcing = kickback? (fwd)

   I use a line filter between the transformer and
control unit and another between the control unit and
wall plug, the filters are tied to the RF ground.
 I'm not sure if I understand your "second" safety
gap, there is no need for a safety gap on the primary
side of the transformers.

Mark Graalman

On Thu, 15 Jan 1998 12:31:42 -0700 (MST) Tesla List <tesla-at-pupman-dot-com>
>---------- Forwarded message ----------
>Date: Thu, 15 Jan 98 11:44:02 -0500
>From: Adam <absmith-at-tiac-dot-net>
>To: Tesla List <tesla-at-pupman-dot-com>
>Subject: Re: Variac arcing = kickback? (fwd)
>> Do you have a GOOD grounded line filter
>>in the AC line between the variac and the 
>Nope.  I have a 20A corcom filter between the wall socket and the 
>but nothing between the variac and the neons.
>Right now, I am designing a primary-side protection circuit to go 
>the neons and the variac.  I am using the same schematic as the corcom 
>filters, but with more robust components and a much lower cutoff freq. 
> I 
>am also putting a second safety gap and the few suitably rated oil 
>caps I 
>have (mostly from microwaves) across the primary of the neons to help 
>absorb the impact before it hits the line filters.  Then finally, a 
>across the mains input to the whole setup.
>Another question:  Should the line filter's ground go to the RF 
>And what about my second safety gap- would this also benefit from a 
>grounded center terminal?