Re: high voltage resistors

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

Original poster: "robert & june heidlebaugh by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Mark: I have used both 12$ glass case high voltage resistors and series
o.05$ composition resistors with equal sucess. The only resistors I have had
trouble with are the carbon film precision resistors and the new film
resistors. These have a spiral carbon film that tends to arc over with high
voltage. The composition resistors have the wire imbeded in the insulation
material and are not as inclined to arc over as film resistors with end
caps. In time the end caps get small holes in the paint coating and
breakdown. I solder the resistor leads side by side with no wrap for high
voltage use.
   Robert  H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Mon, 20 Jan 2003 20:56:18 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: high voltage resistors
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Mon, 20 Jan 2003 21:03:33 -0700
 >
 > Original poster: "Mark Broker by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 > <mbroker-at-thegeekgroup-dot-org>
 >
 > Hello, all!
 >
 > I'm looking for some inexpensive resistors that will stand off 20kV
 > pulses.  I have
 > no objections to using two or three in series.  I need a value of
 > 30-40kohm.  I am
 > currently using 3 1/2W resistors in series, but question the longterm 
standoff
 > ability.  I have been considering the Ohmite OY series - 2W ceramic
 > composition
 > that are about .75" long and .3"diameter, available from Digikey.  But at
 > about a
 > buck each, I'd rather not spend $40 to discover they won't work!
 >
 > Thanks,
 >
 > Mark Broker
 > Chief Engineer, The Geek Group
 >
 >