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@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Will Matney
> Sent: Monday, February 13, 2006 10:39 AM
> To: amps@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
> >Visit the Mt. Airy VHF Radio Club at:
> ><http://www.ij.net/packrats/>http://www.ij.net/packrats/
> >Info on VHF/Microwave Nets, Beacons & Subscription to Cheesebits
> >Beacons at
> >50.080, 144.284, 222.065, 432.298, 903.071, 1,296.262,
> >2,304.034, 3456.220, 5,760.190 and 10,368.140 MHz
> >from FM29JW
> >
> >
> >
> >
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> >
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