Re: Arc'ing in my variac

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

Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net> 

Does it do this with other loads?  One thing I can think of,  the carbon
dust from the brush has built up between the windings and is shorting out
and burning?

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, June 17, 2004 10:46 AM
Subject: Arc'ing in my variac


 > Original poster: Pat Masterson <bat-at-grumman-dot-com>
 >
 > I was tuning my small coil (15/30 NST) and noticed little sparks dancing
 > around the windings of my variac. Is there something fundamentally wrong
 > with the setup, or do I need an RFI filter between the variac and the
 > NST? The variac is an older model, and has no 3rd wire (ground) on its
 > AC line.  -pat
 >
 >
 >