Re: Dead MMC. was: AAAA! My coil...

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

Original poster: "Mark Broker by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mbroker-at-thegeekgroup-dot-org>

Chris, et al,

No, and yes.  When I developed the MMC Chart, I knew that tolerances were 
tight.  Many
of the MMCs built using Terry's acclaimed Panasonic caps had even tighter 
tolerances.
The CDE "Geek Caps" tested about the same as the Panasonics, so I used 
similar ratings
for the chart.  In some cases the GeekMMC has a slightly higher voltage 
rating than the
"TerryMMC".  In other cases, the opposite is true.

The chart was only meant for a newbie coiler, since most of us know where 
to find and how
to use the MMC calculator programs and spread sheets.  With that in mind, I 
also used the
MMC cost as a factor.  Yes, a 9 x 3 MMC would be a safer design than a 6 x 
2, but would
cost 2.25 times more.  So the less expensive design went on the chart.

This is one of only three failures that I'm aware of, and agree with Bart 
that this is likely a
lemon from the factory.

Mark Broker
Chief Engineer, The Geek Group


11/27/2002 9:40:56 PM, "Tesla list" <tesla-at-pupman-dot-com> wrote:

 >Original poster: "Chris Roberts by way of Terry Fritz 
<twftesla-at-qwest-dot-net>" <quezacotl_
14000000000000-at-yahoo-dot-com>
 >
 >
 >So does that mean the geek group MMC ratings are off? If so, would 3
 >strings of 8 caps work? That approaches the original value and should have
 >a higher voltage rating. Sigh- thats quite a few more capacitors (plus the
 >dead one I have to replace). Almost makes me want to go back to bottle caps
 >(shudders at the thought).
 >