RE: 30ma+60ma nst?

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi,

The correct cap values for a 15/90 NST combination for various spark gap
types are listed at:

http://www.thegeekgroup-dot-org/Sales/MMCsales.html

Cheers,

	Terry


At 10:13 PM 12/27/2001 -0500, you wrote:
>It is certainly possible to parallel a 30 and a 60 mA 15kV NST to achieve 
>the equivalent of a 15/90 NST, but when you talk about using a rotary gap, 
>things get more complex.
>
>When you have a static gap, the maximum voltage that is presented to the 
>cap, gap, and NST is strictly limited by the gap width, and is independent 
>of the NST current.  If a higher NST current is available, the cap will just 
>charge faster and the gap will fire more frequently, and everything is still 
>happy.
>
>But when you have a rotary gap, the bang-interval is determined by the 
>rotary speed.  With the same cap size and RSG break rate, if you increase 
>the NST current rating, the peak voltage seen by the cap and NST will go up, 
>possibly to something that will destroy the cap or NST.  When you go from a 
>static gap to a rotary gap, the size of your cap MUST be increased, or you 
>risk over-volting things.
>
>Gary Lau
>MA, USA
>
> -----Original Message-----
>From: 	Tesla list [mailto:tesla-at-pupman-dot-com] 
>Sent:	Thursday, December 27, 2001 8:40 PM
>To:	tesla-at-pupman-dot-com
>Subject:	30ma+60ma nst?
>
>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><steve.tami.andrews-at-att-dot-net>
>
>is it possable to wire up a 15000 30ma & 15000 60ma? i 
>was running two 15000 30ma with no problems untill i 
>decided to unhook the r.q. tcbor gap and thy just the 
>rotary....and lost one nst so no i have a 30ma and a 
>60ma?i am using a 5gal geek group cap(sometimes with two 
>wine bottles)tcbor gap i was using two but one stopped 
>firing,just recently added a four electrode rotary 
>gap,the two nsts,flat pri. 14 turns 1/4 copper 
>sec,6"x27,wound 25"with #22 thanks for all your help :]
>
>
>
>
>