Re: MMC advice

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

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 

Hi Chris,

One consideration that I think is overlooked,  is if the coil is out of tune
(or something else is wrong) so that the energy is not vented as sparks will
cause more engergy to be disipated in the primary (ie, in the sparkgap, in
the primary coil resistance, and in the MMC array's esr).  Measuring the
temp rise of your MMC might give you insight.

Gerry R.
Ft Collins, CO

 > Original poster: "Mudford, Chris" <chris.mudford-at-agresearch.co.nz>
 >
 > Thanks everyone for the replies re MMC.  It appears to be an area which
 > continues to provoke differences in opinion.  So, to stoke the fire
 > again.  If you are looking at a 2 series MOT with voltage doubler that
 > is producing 13000 V peak (pulsed DC) can I use the capacitor DC rating
 > or is there a hidden complication somewhere?
 >
 > Also, as I will be building a new MMC utilising my WIMA 68 nF, 1600 VDC,
 > 650 VAC with 9 per string and 4 strings for 30 nF (1.9 x resonance) is
 > there a problem with producing a circuit board to mount them as they
 > only have short leads (~5mm)?
 >
 > The above MMC should also be suitable for the above MOT power supply re
 > voltage, but, what level of capacitance would I be looking at?  Of
 > course I could make 2 MMC's such as when I decide to go to a MOT supply
 > (probably if my NST gives up) I can run the 2 in parallel.
 >
 > Cheers, Chris.
 >
 >