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capacitor find
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From: Edward J. Wingate [SMTP:ewing7-at-frontiernet-dot-net]
Sent: Monday, June 29, 1998 10:01 AM
To: Tesla List
Subject: Re: capacitor find
Tesla List wrote:
>
> ----------
> From: Hollmike-at-aol-dot-com [SMTP:Hollmike-at-aol-dot-com]
> Sent: Sunday, June 28, 1998 12:39 AM
> To: tesla-at-pupman-dot-com
> Subject: capacitor find
>
> Hi All:
> I recently removed a large cap from an RF generator, but I don't think
> that it was from the part of the circuit that generates the RF. It seemed to
> be part of a 2600V dc circuit that powered the RF generator. I was hoping
> someone on the list could tell me anything about it. What is printed on the
> side is as follows:
>
> PLASTICON
> KNOC 4M 25
> 25 MFD
> 4000VDCW
> THE COND. PROD. CORP.
>
> This is obviously a 200J cap, but my question is: what is the dielectric?
> It seems like it could be polypropylene, but could just as easily be Mylar. I
> desoldered the lid from the can and found three extended foil caps in parallel
> using about 1.25 inch wide tin(?) strips soldered to the ends of each. I, of
> course, cut the strips in order to change them to a series configuration to
> get a 2.7uF(measured), 12kVDC cap.
> My hope is to be able to use this as either a tank cap for induction
> heating or even as part of a TC primary cap. Does anybody know if this will
> work as such? I am hoping that even if the dielectric is Mylar, that the high
> power rating will allow it to be used without overheating since I would only
> be applying a small fraction of the power that the RF generator was designed
> for(less than 1/10 of what it is designed to handle).
> Thanks in advance for any info you can give me.
> Mike Hollingsworth
Mike,
The N in the Condenser Products part number does signify polypropylene
dielectric but the capacitance and voltage values of your modified cap
are not even close to what is needed for a reasonable Tesla tank
capacitor.
Safe Coiling,
Ed Wingate