Re: Measuring NST current

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

Original poster: "Shaun Epp by way of Terry Fritz <twftesla-at-qwest-dot-net>" <scepp-at-mts-dot-net>

Hello Bert,

A 1/2 watt resistor power, wise works for 20 mA but, a regular 1/2 watt
resistor would not have the stand off voltage rating for this.  The person
doing this test should use a BIG 1000 watt resistor to stand off the 4 Kv or
a series of several smaller ohmage resistors to be safe.

Oops, I just realized that 20 mA through 1000 Ohms is only 20 Volts (so much
for high voltage) but,  I'd feel safer knowing that if anything goes wrong,
its safe and I won't end up with a smoking flare and arcs (but we all like
arcs, don't we ?) for a resistor.

Shaun Epp


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, October 10, 2002 7:41 PM
Subject: Re: Measuring NST current


> Original poster: "Bert Hickman by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<bert.hickman-at-aquila-dot-net>
>
> Hi Ed,
>
> These open core and coil transformers already have one end of the HV
> output grounded to the core. Connect a 1000 ohm 1/2 watt (or larger)
> resistor across the other HV output and carefully measure the voltage
> across the resistor (connect firmly and keep hands off during the
> measurement). The voltage output in volts will be equal to the output in
> milliamperes.
>
> Best regards,
>
> -- Bert --
> --
> Bert Hickman
> Stoneridge Engineering
> "Electromagically" (TM) Shrunken Coins!
> http://www.teslamania-dot-com
>
> Tesla list wrote:
> >
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Esondrmn-at-aol-dot-com>
> >
> > Any advice on how to measure the output current of my new 4 kv 20 ma
> > transformer?  I do not have an AC milliamp meter.  How about placing a
2,500
> > ohm resistor across the output.  If I have 20 ma, I should measure 50
volts
> > ac.  Sound ok?
> >
> > Thanks, Ed Sonderman
>