RE: arcing to primary

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

Original poster: "Lau, Gary by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Gary.Lau-at-hp-dot-com>

I'm not sure that a primary strike (or any number of them) poses any threat 
to the tank cap.  If your tank cap starts out charged to 20kV, transfers 
that energy to the secondary, and then following a strike manages to 
achieve some higher voltage across the tank cap, then you've _created_ 
energy in the process, clearly impossible, a violation of conservation of 
energy.

A greater hazard from primary strikes is common-mode voltage applied to the 
NST secondary.  This is why safety gaps and bypass caps to ground in an NST 
protection network are recommended.  And even with these measures, 
common-mode noise transmitted through the NST to the mains is likely, and 
this is why EMI line filters are recommended.

Regards, Gary Lau
MA, USA


 >Original poster: "Dr. Resonance by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >
 >Any time you connect 400-500 kV to a primary coil that is directly
 >connected to a capacitor bank it puts excessive stress on the caps.  It's
 >sort of like the "final straw that broke the camel's back".  It may not
 >kill them immediately but it's definitely not a good idea to allow this to
 >continue unabated.
 >
 >Support 3-4 small round brass cabinet knobs on 1/2 in. dia. x 3 in high
 >Delrin posts at the outermost edge of the upper subbase assembly.  We run
 >the ground wire connection inside the Delrin support post.  Each is
 >connected to ground and provide a rapid attachment point for stray streamers.
 >
 >Dr. Resonance