Re:Re: M.M.C.

["Al Hassick" <uncadoc-at-juno-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Terry.  I downloaded your Mmccalc.bas-notepad, version 2.1 circa
2-19-2000, but I cannot for the life of me figure out how to use it.  It
looks great when I opened it but I do not understand how to use it.  That
is why I sent you as many of my coil parameters as I could.  The
calculations befuddle me!  Math was never my ball of wax!  Thanks, Al.

On Wed, 06 Sep 2000 13:28:58 -0600 "Tesla list" <tesla-at-pupman-dot-com>
writes:
> Original poster: Terry Fritz <twftesla-at-uswest-dot-net>
> 
> Hi Al,
> 
> 	I need to know some details:
> 
> What frequency does you coil run at?  Poly caps heat more at higher
> frequencies so they have to be sized to the frequency if one is 
> trying to
> be really careful.
> 
> What type of gap do you have.  The RMS current is directly 
> propartional to
> the firing rate.  I assume the firing voltage is about 21kV.
> 
> If you know the values of cap you want that helps ;-))
> 
> There is a simple BASIC DOS program below that can do the 
> calculations for
> you too:
> 
> http://users.better-dot-org/tfritz/site/programs/MMCCALC2.ZIP
> 
> The numbers change a bit depending on the exact type, value, and
> manufacturer of cap you use.  I use ones from DigiKey which I know 
> well,
> but there are all kinds of great caps. 
> 
> Check the links in these posts out and let me know the data about 
> your coil
> and we can work the numbers.  If the voltage peak is within the DC 
> rating
> and the RMS current does not heat them more than 5C, they will last
> thousands of hours...
> 
> At 11:40 AM 9/6/00 -0400, you wrote:
> >Hi Terry and all.  Terry, what kind of polypropylene caps would you
> >recommend for a coil using two paralleled 15kv-at-60ma modified neons 
> that
> >could sustain a minimum of a 60 minute run?  They draw 16 amps at 
> full
> >output but limited by 4500w 240v water tank elements.   At full 
> blast
> >with no resistive load they will pop a 20 amp breaker after about 
> 10 to
> >15 minutes, I guess from the heating effect on the 20a. line.  So I 
> run
> >them on a separate 30a. 10 ga. 120v. line to get sustained runs.    
> 
> >Thank you  Al.
> >
> 
>