Rich asks about my 'testing' method for the PS choke.... he he he One of
these day's I'll cook together a hi-pot tester, but this little problem was
determined using the 'modified smoke' test approach.
First indication was a loud ZAP followed by a tripped main CB. I've worried
about the choke since day 1 since it's only rated to 3KV.
I wired the primary pf the power tranny to run on 120VAC - and all was well
at 2KV DC (RF chassis disconnected). Then I stepped thru the 6 primary taps
on the transformer until it was appx 3KV, another ZAP after a few seconds.
I ran it for maybe 10 minutes @ 2KV - but not too long as I don't want to
'grow' any more of a carbon trail than necessary.
I suspect it'll be just fine in the CT of the tranny - at least until I can
get around to pulling it out an possibly repairing / rewinding it.
Thanks Rich and Peter for the input on sticking it in the CT. I'm not in
the least
worried about the HV transformer. It's a huge oil filled thing with big
glass insulators for the HV and the CT - I suspect the CT can take the extra
volts. And I have some additional resonating caps I can play with too.
73 es THX again, Bill N2BC
-----Original Message-----
From: Rich Measures <measures@vc.net>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Tuesday, May 04, 1999 4:29 AM
Subject: Re: [AMPS] PS question
>
>
>
>>
>>I have a resonated choke in my 4KV supply (CT FW configuration). The choke
>>has decided that it's limit is about 2KV according to the measurements
I've
>>made. The simple cure for this is to place it in the CT minus return. Or
is
>>it?? There must be drawbacks to placing the choke in the minus side - or
>>all HV PSs would be built that way. What am I missing?
>>
>There is free lunch. . Placing the choke in the CT elevates the CT
>above ground, thereby placing more stress in the insulation in the HV
>transformer.
>What is the indication that the choke is limited to c. 2kV, Bill?
>- cheers
>
>
>
>Rich...
>
>R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
>
>
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