Re: MMC or Maxwell? Which is better? -- MMC tends to be better for the amateur.

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


If you select the total for a rating of Erms x 2.5 per string they will
probably last a lifetime --- almost as long as a Maxwell.  I asked a cap
engineer once and he told me they design for 3 x Erms for an AC vs. DC
rating in their internal series-connected caps.

Dr. Resonance

 >
 > A lot of the first MMCs went to replacing blown commercial caps!!!  People
 > were buying "hundreds" at a time!!  Not for that 9kv 30 coil, but for big
 > pig systems... I thought that big $1300 cap order would last us all
forever
 > :o)))  There was a big pent up demand for something to replace those
 > &^$&^$^%&# commercial caps folks had just fried...  Indeed, I think the
big
 > coils were the first ready to "take the leap" into that new technology "no
 > matter what"...   I think the first 1000 went to "four" orders...
 >
 > It was kind of scarry!!  Gosh!, suppose they all crapped out!!  I "was"
 > ready to eat all costs and give people their money back...  But I guess it
 > worked ;-)))  I think I sent a few orders twice due to confusion.  I think
 > I sent one too few caps to Finn?  I sure was happy when the Geek Group
took
 > that mess "away" from me :-)))
 >
 > But the reported unexplained failures, in my case, is still zero...
 >
 > I have not made many dents in this world, and I never forget that Reinhard
 > was there way first..., but I guess the MMC thing did earn me a tiny bit
in
 > Tesla coiling history :-)
 >
 > I wish to also mention Garry Freemyer for his help in testing.  If Garry
 > could not blow a Tesla coil cap up, nobody could ;-))  I remember waiting
 > to here back...  I kept checking the E-mail...  But I got the answer ;-))
 >
 > http://www.pupman-dot-com/listarchives/2000/October/msg00122.html
 >
 > Hehehe,  I carefully crafted that one string MMC cause I wanted to shake
 > him up ;o)))
 >
 > Garry also found (the hard way) the metalized vs. solid foil electrode
issue!
 >
 > Of course, our list owner Chip, blowing his commercial caps all over the
 > roof of his house on that fateful Halloween night....
 >
 > Cheers,
 >
 >          Terry
 >
 >
 >
 > At 08:48 PM 2/26/2004, you wrote:
 > >Terry,
 > >
 > >I'm still using the Panasonics I got from your first bulk purchase. They
 > >have been on coils from 5kva up to 20kva and have seen many hours of run
 > >time with NO decrease in performance. In fact they have been swapped in
 > >to troubleshoot commercial cap failures.
 > >
 > >Regards,
 > >Brian B.
 > >
 > >
 > >-----Original Message-----
 > >From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > >Sent: Thursday, February 26, 2004 6:44 PM
 > >To: tesla-at-pupman-dot-com
 > >Subject: Re: MMC or Maxwell? Which is better? -- MMC tends to be better
 > >for the amateur.
 > >
 > >Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>
 > >
 > >Hi,
 > >
 > >They are not to replace bad ones ;-))
 > >
 > >But an interesting question?
 > >
 > >Chris -  I think I sold about 4000+ of the Panasonic caps.  Can you tell
 > >us
 > >how many of the Geek Groups caps you have sold?  To how many people?
 > >That
 > >might be a good indicator of how many coilers there really are out
 > >there.  I think the Tesla list here has about 1500 members.
 > >
 > >Cheers,
 > >
 > >          Terry
 > >
 > >
 > >At 06:51 PM 2/26/2004, you wrote:
 > > >If your caps last forever, why do people keep buying more?
 > > >
 > > >KEN
 > > >
 > > >----- Original Message -----
 > > >From: "Tesla list" <tesla-at-pupman-dot-com>
 > > >To: <tesla-at-pupman-dot-com>
 > > >Sent: Thursday, February 26, 2004 7:30 PM
 > > >Subject: Re: MMC or Maxwell? Which is better? -- MMC tends to be better
 > >for
 > > >the amateur.
 > > >
 > > >
 > > > > Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>
 > > > >
 > > > > Hi,
 > > > >
 > > > > I guess I should mention that MMC were designed to replace
 > >commercial caps
 > > > > that failed all the time...
 > > > >
 > > > > http://www.thegeekgroup-dot-org/projects/MMC/MMC_History.html
 > > > >
 > > > > If Commercial caps didn't fail, there would not be MMCs now...
 > > > >
 > > > > Cheers,
 > > > >
 > > > >          Terry
 > > > >
 > > > >
 > > > > At 02:59 PM 2/26/2004, you wrote:
 > > > > >Kreso,
 > > > > >
 > > > > >--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > > > > > > Original poster: Kreso Bukvic
 > > > > > > <kreso.bukvic-at-kc.htnet.hr>
 > > > > > >
 > > > > > > I blew a maxwell and il buy it again! The MMC will
 > > > > > > work good if you spend
 > > > > > > few thousand bucks! Overrating mmc-is bS!
 > > > > >
 > > > > >Hmmm.  I've been overrating a Terry (Panasonic) MMC
 > > > > >for about 5 years now of quite frequent coil use.  No
 > > > > >problem.  No diminished capacitance, no decreased arc
 > > > > >length.  I have a maxwell.  It works fine, but no
 > > > > >better than the MMC, in fact the longest arcs were
 > > > > >measured during an MMC run.
 > > > > >
 > > > > >What is your evidence for the above statement
 > > > > >regarding overrating MMC's?  I would like to see your
 > > > > >web page, and/or possibly read your coil specs.  What
 > > > > >about data?  Computer simulations.....arc lengths?
 > > > > >
 > > > > >Coilers on this list know to a high degree of
 > > > > >certainty (due to failure mode testing) that MMC's
 > > > > >tend to survive being pushed somewhat beyond their
 > > > > >ratings.  You may benefit from a little more reading
 > > > > >on this subject.
 > > > > >
 > > > > >-Brett
 > > > > >
 >
 >
 >