Re: Measuring NST current

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

"I" would use a cheap "expendable" meter for such a test.  I could use a
$30 DVM or the $1000 HP meter...  Probably best to use the $30 meter when I
goof and leave it in the ohms range....  NSTs have fried lots of meters...
Be super careful when hooking CMOS stuff up to 15,000 volts!!!!

Cheers,

	Terry


At 10:54 PM 10/10/2002 -0500, you wrote:
>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
>>
>