----- Original Message -----
From: <gdaught6@stanford.edu>
To: <amps@contesting.com>
Sent: Thursday, March 22, 2012 3:11 PM
Subject: Re: [Amps] Sourcing HV Air Dielectric Caps
> Pat B. wrote...
>
>> I discovered an endless source of HV Air Capacitors, from another
>> application. Might be good for KW amps, or QRO antenna Tuner Components.
>> The local Goodwill Store, has large numbers of Air cleaners, filters for
>> the home, a continuous supply, seemingly cleared from SK homes, and
>> donated to good will. Lots move through the store, but there always
>> seems to be a half dozen on the shelf at about $4- 5.00 ea.
>
>> I have pulled a couple apart, to find the HV supply, across an interlaced
>> stack of plates,
> well insulated from each other and ground, with maybe 1/8 - 1/4 spacing
> and 5 - 10
> KV,
> 1 ma power supplies. The fan pulls incoming air through the fixed
> capacitor and a lot
> of the
> dust is charged, and precipitates out, is trapped.
>
>> The plates have pretty good insulation and standoffs to ground. at
>> $4.00 for a working
> uint that had 5KV, 1 ma supply and a nice stack, it seems a good source
> for HV air
> dielectric caps..
>
> and two of the PS units, properly isolated/insulated might make a good
> hipot power
> supply..
>
> 73,
>
> George T Daughters, K6GT
Id be more inclined to do a doubler and go DC. Mount the transformer on good
insulators on top of a plexiglass base in case the winding to case
insulation breaks down. A couple of .5uF 10KV caps in series for the filter.
Carl
KM1H
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