IDR Primary Magnetic Field Mapping

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

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

All

I tried the NIB magnet "snooping of magnetic field intensity of the
primary assembly last night.  I used a "back fed" MOT with 120VAC
feeding HV primary and a set of car jumper cables used from sec. of
MOT to either end of IDR copper tubing primary.  120VAC burden
was approximately 2-3 A (250W input measured on wattmeter)
Field intensity was dependent on turn center spacing (as expected),
noticeably stronger intensity was felt around IDR/current
concentrator.

Pictures of assembly at:
 http://hot-streamer-dot-com/temp/DaveSharpe/

Commentary of pics at:
 http://hot-streamer-dot-com/temp/IDR%20Commentary%2001.doc

Next on plate will be to map magnetic field intensity using a
CT as a current drive input and a small 'E' Ferite "snooper"
coil tied to input of a o'scope, will map through section of
primary.  Will be interesting to see effects toward center of
primary and if additional IDR work (adding a slot) will be
necessary / desireable.

Regards
Dave Sharpe, TCBOR
Chesterfield, VA. USA