High Voltage Test Equipment

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: High Voltage Test Equipment
From: Tesla List <tesla-at-stic-dot-net>
Date: Thu, 5 Mar 1998 19:11:52 -0600
Approved: tesla-at-stic-dot-net


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From:  Homer Lea [SMTP:HomerLea-at-aol-dot-com]
Sent:  Thursday, March 05, 1998 2:05 AM
To:  tesla-at-pupman-dot-com
Subject:  Re: High Voltage Test Equipment

In a message dated 98-03-05 00:46:30 EST, you write:

> From:  terryf-at-verinet-dot-com [SMTP:terryf-at-verinet-dot-com]
>  Sent:  Wednesday, March 04, 1998 5:22 PM
>  To:  Tesla List
>  Subject:  Re: High Voltage Test Equipment
>  
>  Jim,
>          Having just gone through the HV voltage divider design zoo with my
>  equipment, I have one caution.  At 60Hz the long string of resistors will
>  work fine.  However, if you wan't to measure voltage waveforms at say
200KHz
>  the frequency response will be bad.  I am now persuing vacuum molded epoxy
>  encapsulation to get small size, reasonable power dissipation, and high
>  frequency response.  Your oil bath should do the same just a little more
>  "fluid" :-)  Do try to make it very compact.
>  
>          Terry
>  
  Terry:
I just sent off new specs:
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post script: I ended up getting 400 15meg resistors. They are small (1/8)
watt. My plan is to string them in series, put them in a Tygon tube and fill
with oil. I will coil up the tube so it isn't 20 feet long. I assume the
inductive reactance will be zilch compared to the 6 billion ohms of resistors
The resistors will be in series with a  50 or 100 ua meter connected through a
full wave rectifier bridge. Does anyone know how much voltage I can put across
each resistor?? I am hoping for at least 500 v each and dreaming of 1000 v.
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A 20 foot tube it not small, even coiled up. Is that going to screw me up? My
original thought was simply to measure the output voltage of coils rather than
wave forms.
jim heagy