[Amps] Hi Pot Test Procedure?

Gary K9GS garyk9gs at wi.rr.com
Mon Feb 13 16:29:19 PST 2012

Thanks for the reply Brad.

I took the tubes into the office today.  The hi-pot tester there only 
went to 5kV.  It was so fast to test I ended up going between the anode 
and each tube element.  No problems on either tube although the tech 
that was watching me was fascinated by the tube.

He's never seen a vacuum tube before except in text books, much less one 
not made of glass or one that big.  When he asked about the voltages 
normally applied (I showed him a spec sheet) his eyes got really big and 
I got the "you're nuts" look :))  When I applied the HV he backed away 
saying he's never cranked the hi-pot to 5kV before :))

Kinda made my day.............

On 2/12/2012 7:51 PM, B Osburn wrote:
> Since you are just checking the integrity of the vacuum I just did anode to cathode.  RLM may say different.
> Brad AB0YD
>    ----- Original Message -----
>    From: Gary K9GS<mailto:garyk9gs at wi.rr.com>
>    To: AMPS Mailing List<mailto:amps at contesting.com>
>    Sent: Sunday, February 12, 2012 6:09 PM
>    Subject: [Amps] Hi Pot Test Procedure?
>    What is the proper procedure for Hi-Pot testing a tetrode, in this case
>    a GU74B?
>    Apply potential between anode and any other element?  I did see one
>    mention of applying potential between the anode and the nearest grid but
>    is this correct?
>    --
>    73,
>    Gary K9GS
>    Check out K9NS on the web:  http://www.k9ns.com<http://www.k9ns.com/>
>    Greater Milwaukee DX Association: http://www.gmdxa.org<http://www.gmdxa.org/>
>    Society of Midwest Contesters: http://www.w9smc.com<http://www.w9smc.com/>
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Gary K9GS

Check out K9NS on the web:  http://www.k9ns.com
Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com


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