NST protect schematics... Review

• To: Tesla List <tesla-at-pupman-dot-com>
• Subject: NST protect schematics... Review
• From: pmathus-at-learningco-dot-com
• Date: Mon, 21 Feb 2000 14:20:30 -0500

     Could you folks review my proposed NST protection circuit schematic?
     
     Here goes:
     
     Coil specs:  
     
     10 amp 0-140v variac
     12KV, 60mA NST, 
     Tank cap: .01uF Fair Radio cap
     Primary: 16 turns .25" Cu tubing
     Secondary: 6"x24" 22 awg
     Toroid: 6"x18" (approx) heating duct
     
     Protection/Power circuit (the part i need help with)
     
     -20 amp EMI line filter before variac
     -safety gap after NST, middle grounded to RF ground
     -2 460pf 30kv doorknob bypass caps, one from each NST leg to RF ground
     -2 1800 ohm, 113w resistors, one on each leg after bypass caps and 
     before sparkgap
     
     Does that sound okay? Will this setup be okay if I decide to add more 
     NSTs for 90mA or 120mA?  The bypass caps seem to be about what 
     everyone else is using but I'm wondering if the resistor size/rating 
     is correct. . . 

     thanks,
     
     paul mathus

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