Re: [TCML] MMC construction

["DC Cox" <resonance@xxxxxxxxxxxx>]

Best to avoid any boards with copper on them. Corona and/or high voltage
tracking can occur which causes arcing, and with a 120 mA nst the high
current will definitely melt your board material, or carborize it, thus
making it useless.

A local plastic company can cut you some PE (polyethylene) board to a 9" x
11" dimension x 1/8" thick for a low price.  Check in the yellow pages of
any large city or online.
The bare PE is a great anti-tracking material and you just drill holes where
you need them.  Careful not to use a graphite pencil for layout.  You can
use a magic marker and then erase the lines with alcohol after drilling the
holes.

Dr. Resonance




On Wed, May 14, 2008 at 3:31 PM, Michael Bellah <michaelbellah@xxxxxxx>
wrote:

> Hello List,
>
> I am starting to build my MMC and have a question about the type of PC
> Board I am using. I bought General Purpose PC Boards from Radio Shack Cat.#
> 276-147. These boards have what appears to be copper paint? around each hole
> on one side. Will this present an arching problem? If not which side of the
> board would be best for the caps to be on. I am guessing they should go on
> the "plain" side and then one could solder them to the copper areas on the
> other side to hold them in place. I am running a 9kv 120ma nst. MMC is 20ea.
> 1600v 1uf poly caps in series.
>
> Thanks for the help,
>
> Michael Bellah
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