[Amps] Sourcing HV Air Dielectric Caps

[Carl]

----- Original Message ----- 
From: <gdaught6 at stanford.edu>
To: <amps at 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