From: Marco Denicolai
Date: Thu, 12 Jul 2001 14:18:03 +0300
Subject: [TSSP] Toroid breakout threshold modified
Hello all, I added a curved section of copper pipe (15 mm o.d.) to Thor's toroid. It is sticked to it by two pieces aluminium tape, just like "a fat vein below the toroid skin" . Now the toroid breakout threshold is around 15200 V (feed). This is a satisfactory compromise, in my opinion, as opposite to the two extremes: 1 - plain toroid, threshold about 18 kV, very near to the SMPS maximum output. Very fat streamers, but also "wild", that easily hit to wrong places. 2 - toroid with added sharp tip, threshold about 10 kV, very near to the RSG threshold. I can't get functionality without streamers: useless for measurements. Streamers are still long but pretty thin, not very impressive (let's forget about the scientific side, for a moment :) ). The present solution allows for no-streamer and safe-streamer operation, while streamers are fat and long as usual (or, at least, I can't see the difference). I measured again secondary voltage and current and saw NO DIFFERENCE: this makes me believe that I didn't modify the toroid capacitance significatively, just its radius of curvature (as intended). Therefore, we can keep Thor's model as valid and I'm going to leave the copper tube section there, attached to the toroid. Best Regards -- _____________________________________________________________ Marco Denicolai Senior Design Engineer Tellabs Oy tel: +358 9 4131 2769 DSL Products mobile: +358 50 353 9468 Sinikalliontie 7 fax: +358 9 4131 2410 02630 Espoo FINLAND email: marco.denicolai@tellabs.com _____________________________________________________________
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.