Re: Cap Question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Kevin Ottalini by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ottalini-at-mindspring-dot-com>

All:
    I believe that Mike Loftus has a few dozen of the green high-performance
pulse caps still available that fit this niche a little better than MMCs,
very cost
and size effective for the performance.

They are 0.09ufd and 0.100ufd (and maybe 0.125) at 10kV, 5Arms, 4000Apeak.

With a 14,400v AC tranny I recommend 3 in series (but I use 2 typically) so
assuming worstcase cost, 3 in series/3 in parallel (9 total) with the
0.09ufd
caps you get .09uFd at 30kv, 15Arms for $40ea or $360 total.

If you use the 2 in series 2 in parallel and push the envelope, that's only
4 caps for $160 (gosh is 20kv at 10A rms enough?).

I currently run 2s/2p in my TC up to 4kw with no sign of heating or
problems with a 14400v PT.

Pics and tech info is here:
    http://www.mindspring-dot-com/~ottalini/
look under high voltage capacitor information.

Email Mike directly if you are interested at
    loftusm-at-ix-dot-netcom-dot-com

Best,
    Kevin

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, April 04, 2002 7:25 AM
Subject: Re: Cap Question


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Tesla729-at-cs-dot-com>
>
> In a message dated 4/3/02 10:20:21 PM Pacific Standard Time,
tesla-at-pupman-dot-com
> writes:
>
> <<
>  Take an example - a large pig coil tank cap, 80kVDC 0.07µF.
>
>  MMC with geekgroup caps - 19 strings of 40 would be required.  760 caps,
at
>  $3 each that works out at - $2280. Excluding shipping.
>
>  Commercial - Brand new, EFO polyprop. $980.  Excluding shipping.
>   >>
>
> Hi Dave, Terry, all,
>
> Yes, no doubt, commercial pulse caps are more practical for
> larger pole pig systems. And in addition to the $2280 price tag
> for a piggie-sized MMC, you have to consider the time, solder,
> and labor of soldering together 760 little capacitors! ARGH!!!!!
> For NST and OBIT systems however, MMCs,  are definitely
> the best game in town for the average ameture coiler.
>
> Spark safely,
> David Rieben,
> Memphis, TN, USA
>
>
>