Re: Stacked Aluminum and plastic caps in oil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>



Glass is a very bad choice.  It's dissipation factor is very high and 
it wastes nearly 15-20% of your energy in the form of heat which can 
cause the glass to crack.  Glass is ok for DC caps but terrible for 
caps operating at RF frequencies.

Use polyethylene, polypropylene, or polystyrene as good choices for 
RF dielectric material.

Oil is very messy and very difficult to clean up after you spill 
it.  MMC caps still represent the most reasonable and cost effective 
way to build caps for Tesla coil applications.

Dr. Resonance




> Original poster: "Greg Morris" <gbmorris@xxxxxxxxx>
>
> Paul,
>
> Gosh, it's been a while since that was posted, hope you're still 
> interested. Sorry about the delay, I guess I must have somehow 
> missed your message when first posted. Anyhow, I was searching for 
> that Distilled Water as a Dielectric talk, as there was some 
> interesting stuff as I recalled, and I'm getting ready to finally 
> start building my new coil. My original drawings for the capacitor 
> we were discussing can be found here: < 
> <http://www.angelfire.com/nb/rish/images/Coiling/scan0002.jpg>http://www.angelfire.com/nb/rish/images/Coiling/scan0002.jpg> 
> and here: < 
> http://www.angelfire.com/nb/rish/images/Coiling/scan0003.jpg>. 
> (Sorry about the angelfire, what with the ads and slow loading, but 
> as of right now it's the only webspace I have.) What is not shown 
> there is my idea for a handle integrated with a clamp and metre 
> stick type of arrangement for easy adjustment and measurement. Now 
> that I've revisited the ideas, and know a bit more than I did last 
> year I'm thinking some kind of glass dielectric under oil might 
> work. Same idea as in those images, perhaps with a few changes like 
> a greater number of plates and larger general size of the container.
>
>
> Greg
>
> On 6/4/05, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
> Original poster: "Paul B. Brodie" 
> <<mailto:pbbrodie@xxxxxxxxxxxxx>pbbrodie@xxxxxxxxxxxxx>
>
> Greg,
> You said, "How do your designs compare to the ones you saw  above (mine)?"
>
> Where can I see these pics of yours "above (mine)?"
> I am really interested in this type of cap construction and would like to
> see yours and get any information you have about them. Thanks.
> Paul
> Think Positive
>
> ----- Original Message -----
> From: "Tesla list" 
> <<mailto:tesla@xxxxxxxxxx><mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> To: <<mailto: tesla@xxxxxxxxxx><mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> Sent: Saturday, June 04, 2005 12:23 PM
> Subject: Re: Distilled water as a dielectric?
>
> > Original poster: Greg Morris <<<mailto:>mailto:> 
> gbmorris@xxxxxxxxx><mailto:gbmorris@xxxxxxxxx>gbmorris@xxxxxxxxx>
> >
> >
> >>
> >>This is why I still build parallel plates.  I can build a 50 nF parallel
> >>plate unit for under $30.  Biggest cost is the food storage box.
> >>Assembly time under 2 hrs.
> >>
> >>Mark
> >
> >
> > Sounds good, Mark. Do you have any images of caps you've built? 
> How do > your
> > designs compare to the ones you saw above (mine)?
> >
> > Greg
> >
> >
> >
> >
> >