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Re: Fluke 27 (don't do it)



to: Ross

Just pick up a good used surplus 200 mA AC ammeter and keep around for
measuring NST's.  Fair Radio Sales in Lima, OH, and C & H Saales, Pasadena,
CA, both have some nice used meters in this range.  Price around $5-10.

If we measure a neon we just lay the meter on a piece of plastic and use
neon sign wires (heavy silicone HV) with jumper clips.  Check each terminal
to ground.

Save the Fluke for digital!!!

Regards,

Dr. Resonance


-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Friday, December 24, 1999 3:01 PM
Subject: RE: Fluke 27 (don't do it)


>Original Poster: "Ross Overstreet" <ross-o-at-mindspring-dot-com>
>
>Sure, you can easily measure the output current of a NST with the fluke
>meter.  Life is good until for some reason the fuse in the meter blows.
>Then the Fluke becomes a sealed spark gap and the arc dances all over the
>board in its attempt to find the lowest impedance path between opposite
ends
>of the fuse holder.
>
>DON'T TRY IT.  Me and several of my buddies have felt the agony of defeat
>when using high priced test equipment around HV.
>
>You can buy an inexpensive Radio Shack (or any other) 0-150VAC meter and
>convert it to a current meter with the addition of shunt resistors.  Check
>the archive for a post by Terry Fritz that describes how to do this.
>
>Also, keep an eye out for small AC ammeters.  They can be found at surplus
>places, swap meets, ham fests, etc.
>
>Happy Holidays,
>Ross Overstreet
>Huntington Beach, CA
>
>-----Original Message-----
>From: Tesla List [mailto:tesla-at-pupman-dot-com]
>Sent: Thursday, December 23, 1999 10:51 AM
>To: tesla-at-pupman-dot-com
>Subject: Fluke 27 and Transformer Oil
>
>
>Original Poster: "Nathan Ball" <nateburg-at-hotmail-dot-com>
>
>Greetings!
>
>I am Nathan Ball, 16 year old coil builder and new to the list.
>
>I have a couple of questions:
>
>I have access to the use of a Fluke 27 DMM and was wondering if there was a
>way I could use it to measure the output current on the 15/30 NSTs i
>rebuilt.  It says in the manual that the max input voltage for AC mA is
>600V...
>
>Also, I am building some new capacitors that will add up to 0.0265
>microfarad to match the new power supply of 15/150.
>
>I built a 0.0053 uF cap before and used 8 sheets of LDPE between each
plate.
>  I have since seen most people using at minimum 60 total mils and mostly
>aroun 80-90, but I have never had any problems running a 15/30 through it.
>
>I think it may be because of the extremely pure transformer oil I got to
put
>it in... but do you guys think 0.048 inches is enough for a 15/150?
>
>Thanks in advance!
>
>Nathan Ball
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail-dot-com
>
>
>
>