Re: Cap Question

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

Original poster: "sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>

Hi All,
   A fellow coiler (lurker) here James and myself use these "Green Meanies" 
on our pig powered coils.  The performance is top-notch, the caps don't 
take up much space for a goodly amount of capacitance, and they are tough. 
I've used them as the tank cap in my pig powered coil, for bouncing small 
aluminum rings in pulse-discharge experiments, and as smoothing caps for my 
VTTC's DC supply.  They're well worth the price (I ended up buying 18 of 
the .1uf caps) for my LTR pig experiment.  After some digging at the 
numbers, I sold 4 of them to a buddy for what I paid for them. He put them 
all in series for use on his NST powered coil, because he's going to 
eventually move up to a polepig powered coil.

    At last year's FL Teslathon (Coming up again in June), we pounded the 
caps with lots 'o power (what was it James, 240v37A? 280V?) and they gave 
us zero problems.  This year they're gonna take even more of a pounding, as 
we'll have more power available to run them on.

   Hope it helps!

  At 12:54 PM 4/4/02 -0700, you wrote:
>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
> >
> >
> >

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Shad (Sundog)
G-2 #1203
"Ever stop to think, and forget to start again?"
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