Re: Newbie cap and topload questions

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: jvillecheesehead@xxxxxxxxxxxxxxxx 

Forgot to post the link for the sparkgap pic:
http://www.nd.edu/~wdettlaf/Tesla%20Coil/sparkgap.JPG
Thanks again!

On Sat, 07 Jan 2006 9:56:08 -0500 (EST), "Tesla list" <tesla@xxxxxxxxxx> wrote:
> Original poster: jvillecheesehead@xxxxxxxxxxxxxxxx
>
> Hi,
> I'm a first time coiler and it took until now for me to finally discover how
> useful this list was.  Anyhow, I am using a 15kv 20mA nst and have wound my
> secondary of 4" diameter 20" height with 800 turns of 23 gauge wire.  My
> question is about a couple options with caps.  First, I am assuming
> this 35,000V
> .005uf cap from Electronics Goldmine for $2.75 is not suitable for tesla
> coils
> as the site claims and wanted to confirm this.  Here is a link:
>
http://www.goldmine-elec-products.com/prodinfo.asp?number=G15589&amp;variation=&amp;a-
> item=72&mitem=91
>   My other plan was to use this Phillips 1600V .047uf cap that runs
> for a buck a
> piece at the same site:
>
http://www.goldmine-elec-products.com/prodinfo.asp?number=G14832&amp;variation=&amp;a-
> item=67&mitem=91
>   According to an excel calculator, I believe using Terry Fritz's
> data, the best
> reliability/price point would be 2 strings of 19 of these 
caps.  Upon reading
> some other posts it sounds like some people push them harder without any
> issues
> and was wondering if anyone had an opinion on this.
>
> I also had another quick question about the topload.  For some reason in my
> planning (which was a few months ago, couldn't work on the coil while I was
> at
> college) I decided to use a toroid with 3" diameter Al ducting with a total
> diameter of about 10 inches.  Using Barton Anderson's JavaTC 
calculator this
> in
> combination with my other components results in a 390kHz resonant frequency.
> The size and frequency differs from many of the coils I have seen
> online and was
> wondering if there is any problem with using it.
>
> Lastly, I thought I would share a picture of my spark gap that
> includes a simple
> modification to the Richard Quick design that allows for increased
> adjustability.  Thanks for the help!
>
>
>