[Amps] Hipot tester Info Needed

[Gary Schafer]

An easy way to get a nice hipot tester is to pick up one of the AC units
that no one wants. They can be had very cheap. I got a 5 kv AC unit then
built a simple voltage doubler to be used external to the unit. I think it
is an associated research unit too. It has a current limiter trip circuit
that protects things nicely. I mounted two 50 or 100 micro amp meters on a
plastic stand along with resistors and diodes and caps. One meter is in
series to measure current the other to measure the DC voltage. I just clip
this to the AC output of the AC high pot unit and I have over 10kv of DC.
Adjust the variac in the AC unit to control the DC voltage.

73
Gary  K4FMX

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Will Matney
> Sent: Monday, February 13, 2006 10:39 AM
> To: amps at contesting.com
> Subject: Re: [Amps] Hipot tester Info Needed
> 
> Harry,
> 
> I have one of those but not sure about the model. If I can dig it out,
> I'll see if I can find a manual for it. For checking tubes, a leakage of
> around 1uA is undesirable. Also check the HV leads on the hipot for
> cracking, especially where it goes into the hipot. The wires insulation
> gets old and brittle. I changed it on mine using HV lead wire like used
> for the CRT anodes on TV sets. It will carry 40 kV.
> 
> Best,
> 
> Will
> 
> *********** REPLY SEPARATOR  ***********
> 
> On 2/12/06 at 1:52 PM Harry Brown wrote:
> 
> >I was at the Orlando hamfest  yesterday and picked up an Associated
> >Research  Model 4045 AC/DC  Hypot Junior. It appears to be in good
> >condition although I have not powered it up. The  data  that  came with
> it
> >only indicated that it provides 0 to 5KV, ac  or  dc output and up to
> 5ma.
> >
> >Does anyone have any info on the operation, specifically how to adjust
> the
> >leakage indicator?  The meter on it  shows the output voltage and there
> >are
> >indicators for "breakdown" and "leakage". There  is a slot for
> >a  screwdriver adjustment labeled "LEAK ADJ."
> >
> >Any info  on where I can obtain a manual  and/or how to use the test
> >set  for leakage checking will be appreciated.
> >
> >73, Harry, W3IIT
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> >
> >
> >
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