Re: NST Resistors

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

Original poster: Gregory Hunter <ghunter31014-at-yahoo-dot-com> 

The resistor doesn't have to hold off the entire
potential developed by the NST. Technically, the
resistor can't even "feel" the high voltage. The
voltage drop across the resistor element is the
important part. For example, 60ma across a 1000 ohm
resistor is only 60v. Make sure the Aluminum heat sink
is well isolated from ground (any everything else for
that matter), and your resistors should be fine.

Cheers,

Greg

--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "Tristan Steele"
 > <tsteele-at-westnet-dot-com.au>
 >
 > Me Again,
 >
 > Thanks to everyone that responded, I have now
 > located all required
 > parts.  After looking through the data sheets on the
 > components on the
 > "original" Terry Filter, I have notice that the
 > listed DigiKey part number
 > resistors have a supposed maximum voltage rating of
 > 2845V, yet they are
 > running 7500V on a typical 15kV centre tap circuit.
 > Does this pose any
 > problems?  The resistors that I am intending to use
 > are from RS
 > Electronics, and are rated at 150W.  They have a
 > "limiting element voltage"
 > of 2500V, and a RMS peak of 4500V.  I know that this
 > is nowhere near the
 > output of a single 'leg' of the 12/30 that I am
 > intending to use.  Am I OK
 > to use these resistors?  They have an Aluminium
 > Heatsink attached for the
 > rated 150W.  I am also looking at using a 90mm
 > Secondary, what problems
 > exist if I use a 6:1 aspect instead of a 5:1?
 >
 > Thanks
 > Tristan
 >
 >


=====
Gregory R. Hunter

http://hot-streamer-dot-com/greg