Re: mmc and high current.....

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Dave,

I ran the numbers and got:

MMC Calculator  Ver. 2.2   9/12/2000  Terry Fritz
Transformer voltage =  14400 
Transformer current =  .5 
Firing voltage =  20364.62 
Fo =  200000 
Break rate =  600 
Thermal dissipation constant =  22 
Individual cap value =  1.5E-07 
 
Strings  Caps/Str  Capacitance  Voltage   Temp C    Cost              I Arms
  3       11         40.91        22000    16.29   99.00  :-))  :-(   26.28 
  4       15         40.00        30000     8.76  180.00  :-))  :-)   25.69 
--------------------------------------------------------------------
  5       18         41.67        36000     6.08  270.00  :-))  :-)   26.76 
  5       19         39.47        38000     5.46  285.00  :-))  :-)   25.35 


Looks like 4 stings of 15 caps will be just fine :-)

Cheers,

	Terry

At 02:35 AM 1/28/2002 +0000, you wrote: 
>
>The cap will be a .04mfd (I'm getting 15 extra just in case: ) The rotary is 
>non-sync with 8 spinning electrodes at APPROX 4000-5000rpm, 600bps ???? The 
>gap motor is 120v ac-dc, 0-10,000rpm and I ran it at about 45-50volts on my 
>old coil. Also the old system performed well with two rolled poly caps, 
>.038mfd, thats how I came up with the .04 for the new cap. This could be a 
>good test for these 'Geek caps'. The ol' rolled caps held up to a few long 
>runs, 3-5min. at a time at 5kva, but I did hold my variac to 200v out so as 
>not to blow the caps. Don't know how much life is left in them, better get a 
>mmc. Thanks for your help!!!!!!!!dave
>
>
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