Re: MMC bleed resistors - was Dead MMC.

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

Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>" <youngs-at-konnections-dot-net>


Just to clarify.  Terry is correct for single resistors.  But 1/4 watt
resistors work fine IF you put 3 of them in series for each cap.  You can
buy 1/4 watt resistors for about a penny each in lots of 100 (e.g. Jameco).

--Steve Young
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, November 27, 2002 8:38 PM
Subject: Re: Dead MMC. was: AAAA! My coil...


 >
 > Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
 >
 > Hi,
 >
 > 1/4 watt resistors will not work for MMC bleeder resistors.  They don't
 > have enough size to standoff the voltage.  1/2 watt is the minimum size
needed.
 >
 > DigiKey #  10MH-ND   is very popular and well tested.
 >
 > Cheers,
 >
 >          Terry
 >
 > At 07:45 PM 11/27/2002 +0000, you wrote:
 >
 > >Just a note.. standard size resistors at 1/4 watt, not 1/2 watt
 > >
 > >>
 > >>At 9000 VAC, the peak voltage is 12728 volts.  Six caps are rated at
 > >>12000 volts.  So you are a little over.  However, I would not worry
about
 > >>it at all.  Six caps per string should be fine.  If you are using 10M
 > >>resistors, they are at their power rating (0.45 watts) so no problem
 > >>there either.
 > >>However, the resistors may get a little warm but spacing them should
keep
 > >>them from heating the caps.  If you wanted to be real safe, you could
use
 > >>two resistors in series per cap.
 > >>
 > >>Cheers,
 > >>
 > >>         Terry
 > >>
 > >>
 > >>
 > >>
 > >>>-Chris
 >
 >
 >
 >