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Re: Test Cap, dry/oil
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Friday, November 28, 1997 10:50 PM
To: Tesla List
Subject: Re: Test Cap, dry/oil
Hi Gary,
Here is the reason....
> From: gweaver[SMTP:gweaver-at-earthlink-dot-net]
> Sent: Thursday, November 27, 1997 10:16 PM
> To: Tesla List
> Subject: Test Cap, dry/oil
>
> I made a test capacitor. Metal plates are 5" x 12" aluminum foil. 6 layers
> of 6" x 13" poly .006 mil. I put a #24 copper wire on each metal plate and
> rolled up the cap. Wrapped it with 2 turns of masking tape to hold it together.
> The finished cap measures about 1.125" dia x 6" long. It measures .00129
> uf. on my meter.
>
> I connected the dry cap to a 6K 20 ma furnace ignition transformer and a
> tiny TC. The output sparks are 3" but not very hot. After 2 minutes of run
> time the cap started getting warm. I placed the cap in a small container
> and poured oil over it. The TC sparks are still 3" long but the discharge
> sparks are now much hotter.
>
> I have been thinking about making a dry poly rolled cap for a small portable
> desk top TC and did this test to see the results of a dry cap on the TC.
> The oil makes a big inprovement in the discharge sparks. The discharge
> sparks did not get any longer but the power output appears to be about
> double. Much thicker and hotter sparks.
>
> Gary Weaver
The output voltage of the coil is practically the same but the
primary is much better loss-wise so if some of the energy ends up
going back to the primary then back to the secondary for another
round trip, a lot less is lost in the cap.
Malcolm