Re: Paralleling dissimilar NST's

To: tesla-at-pupman-dot-com
Subject: Re: Paralleling dissimilar NST's
From: Doreen17j-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Fri, 11 Feb 2000 12:46:13 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi Coilers,

> I'm not sure I agree that paralleling slightly dissimilar Vout transformers
>  will result in losses due to "fighting".  Consider this thought experiment.
>  Take the two 14.5 and 15.5 KV 30mA NSTs and wire them in parallel, 
observing
>  correct phasing.  Apply an AC milliampmeter across the outputs, essentially
>  shorting them.  Since Vout is now essentially zero, their open-circuit Vout
>  difference is no longer significant, but yet their short circuit currents
>  would combine to yield 60mA.  Open circuit, their voltages should average
>  out to 15.0KV,assuming similar winding resistance.
>  

My coil is powered by 9 neons: 4 are 7.5kV rated, the other 5 have 6kV 
plate-rating. I use them all in parallel and achive a short circuit current 
of 1A and a open-circuit Vout of ca. 7.5kV. Thats because the 7.5kV xformers 
deliver ca. 8kV and the 6kV units 6.5kV or so. The platerating in this case 
is not so exact. So I get 7.5kVA and the coil works pretty good (3m sparks).

Coiler Greetings from Germany,
Stefan