Re: [TCML] NST Measurements

[Sfxneon@xxxxxxx]

Exactly. The whole point of the shunts is to turn the NST into a current  
regulated transformer. Unlike incandescent lamps which are self-ballasting  
because they increase in resistance as the current increases, neon tubes  (or spark 
gaps) DECREASE in resistance as the current increases, and have to  have a 
constant current (with a floating voltage) power supply. The current will  
remain essentially the same as the tubes age and require more voltage. Exactly  how 
this translates into useful coiling information I'm not really sure, but  
that is the design principles of an NST.
 
Tony Greer
____________
 
 
In a message dated 1/22/2009 4:17:00 P.M. Central Standard Time,  
yurtle_t@xxxxxxxxx writes:

I have a  HV probe for my DMM, and a 100 ma analog panel meter. I measured 
several 15/30  Franceformer NST's and if I recall, I always got really close to 
15 kV with no  load. When the NST's were dead shorted through the ammeter, I 
got really close  to the rated current. So it appears you get 15 kV at zero ma, 
and 30 ma at 0  kV.

Adam


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