Re: Variac Rumble & Cut Out Question

• To: tesla-at-pupman-dot-com
• Subject: Re: Variac Rumble & Cut Out Question
• From: "me" <weaver77-at-home-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 19 Mar 2000 12:23:01 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Sounds like the brush is not making good contact.  The brush is probable worn
down and has reached the end if its stroke.   Remove the knob and case.  Loosen
the set screw on the side of the rotor and slide the rotor down about a 1/32"
or 1/16" and tighten the set screw.  The brush is spring loaded and it will put
pressure on it.  Now it should work fine unless the bruss is complete worn down
and it has no adjustment left.

Gary Weaver


Tesla List wrote:

> Original Poster: "Eric Leighton" <ELeighton-at-portdiscovery-dot-org>
>
> I was testing some NSTs today with a Jacob's ladder setup, and am noticed a
> light mechanical 'jolt' at the upper end of the variac's range.  It would
> cut out between approx 90% and 99%, and would make the vibration most
> stronly when it 'kicked' back in at 100%.  BTW, the variac is a 10A staco
> model, in nice condition, from a visual inspection, and the NSTs were 12KV
> 60MA 720 VA Allansons.
>
> Eric in Baltimore

• Prev: Re: 250,000 volt nuclear transformer
• Next: Re: Basic Questions that I Know if I Would Think About It...
• Index(es):
  • Main
  • Thread