RE: Coil Doesn't Fire

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

Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com> 

Unless you have a typo, I think your problem is your bleeder resistors.
Folks generally use 10 Meg resistor across each cap, and you indicated
using 1 Meg parts.  That, combined with using 12 paralleled strings
gives you an equivalent bleeder of 667KOhms.  Across a 12kV-RMS source,
this will burn up 18 of your 30 mA as wasted heat.  Also, it looks like
each 1M resistor will dissipate 2.25W.

Regards, Gary Lau
MA, USA

 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Wednesday, September 15, 2004 2:40 PM
 > To: tesla-at-pupman-dot-com
 > Subject: Coil Doesn't Fire
 >
 > Original poster: JBarrett-at-trumbullcorp-dot-com
 >
 >
 > Hey I bet no one has had this problem. Just kidding!
 >
 > Transformer:
 > 12,000 Volt 30 ma
 >
 > Caps
 > Panasonic ECW-H 0.0043uf +- 3% W.V. 1500 VP-P 2500 VDC with a 1
megaohm
 > bleeder resistor across each cap. 8 in series 12 parallel.
 >
 > Secondary
 > 21" of 22 guage wire on a 4 1/2 inch PVC Pipe
 >
 > Primary
 > 14 turns of 3/8 copper tubing mounted on 3/4 inch plastic risers set
at 30
 > degrees. The inner radius is 5 1/2inches.
 >
 > Torid
 > 22 inch major radius of 4 inch flexible dryer duct mounted on aluminum
foil
 > covered 1/4 inch plywood.
 >
 > Spark Gap
 > Air cooled at 25 psi
 >
 > Grounding
 > 2- 4 foot ground rods driven into ground and soaked with h2o.
 >
 > I believe my caps are the major source of the prolem however someone
 > pointed out that my transformer is a little small too.
 > Any other thoughts?
 >
 > JIM
 >
 >