Re: NST current limit adjustment.

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

Original poster: "Jake Draper by way of Terry Fritz <twftesla-at-qwest-dot-net>" <cybermecium2-at-home-dot-com>

So you just hook up the meter directly to the output of the NST?
    -Jake D.
    <mailto:cybermecium2-at-home-dot-com>cybermecium2-at-home-dot-com
    http://taradev.cjb-dot-net
 
-------Original Message-------
 
From: <mailto:tesla-at-pupman-dot-com>Tesla list
Date: Tuesday, July 24, 2001 07:46:25 AM
To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
Subject: Re: NST current limit adjustment.
 
Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ghunter31014-at-yahoo-dot-com>

You can measure the NST current with a regular analog
or digital multimeter connected across the HV outputs
& set on the amps function. I've done this many times.
The meter will short the voltage down to nearly zero,
and the meter can read the 30ma without harm. Make
sure the DMM internal fuse is good. I had a blown DMM
fuse one time and didn't know it. The fuse acted like
a spark gap and my meter was fried! Also, use a cheap
DMM just in case some thing goes wrong. Hook
everything up, get yourself and your hands clear, plug
in the NST from a safe distance away, and read your
current measurement from the meter without touching
anything. Unplug the NST. Make your shunt adjustments,
repeat...

Greg

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Rick W by way of Terry Fritz
> <twftesla-at-qwest-dot-net>"
> <rickwilliams404-at-earthlink-dot-net>
> 
> Hey all,
> 
> I've depotted and reassembled my first NST. Replaced
> the thick tar paper
> wrapping with polypropylene .075" thick.
> I noticed during dissassembly that some of the shunt
> plates were out by half an
> inch for current adjustment. I noted the position of
> everything before
> continuing the disaasembly.
> 
> However, I don't believe everything can be within
> calibration even after
> reassembling everything exactly as it was. 
> 
> So my question is "how to readjust the current limit
> shunt plates?".
> 
> NST:
> Franceformer 15K 30ma 450VA.
> 
> Available equipment:
> O-scope
> Variac
> Multimeter
> Bunch of 50W resistors anywhere from .1 ohm to 50K
> ohms.
> A lot of assorted other parts.
> 
> I have no high voltage probe though. If I need one I
> can get one in about a
> week.
> 
> Thanks!!
> 
> Rick Williams
> Salt Lake City
> 
> 
> 
> 
> 
> 
> 


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