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Re: TANK CIRCIUT AND PRIMARY CONDUCTOR CHOICES



In a message dated 4/9/99 1:59:35 AM Pacific Daylight Time, tesla-at-pupman-dot-com 
writes:

> Original Poster: CHURCHMON-at-aol-dot-com 
>  
>  Hello fellow coilers,I have a question reguarding conductor choices in 
both 
>  the tank circuitry and the primary coil. Hopefully somone on the (tesla 
list)
>  
>  can help .So far I have seen flat strap,ref. tubing ,and heavy guage 
>  wire.Which would give the best performance?
>  
>   Currently,I have a 8"x 28" coil powered by two 15/60's with a vertically 
>  stacked cap.(.027uf) and a series gap. The coil itself has 16 gauge wire 
on 
>  the secondary and the freq. is(234khz. loaded) with a 6"x 20" toroid.The 
>  primary is a flat sprial made of 1/2" ref. tubing (11 turns tapped at the 
> 6th 
>  turn).
>  
>  So far max.spark is 42" and I think there is  more potential. There must 
be 
>  some info. dealing with the certian size of  conductors and the dia.of the 
>  material used depending upon power,volts,current and coupling 
>  characteristics. I am  planning on using either 1/4",3/8,"or 1/2" dia. 
>  tubing.Any help is appreciated.
>  
>  Thanks, Mike Church (CHURCHMON)4/8/99
>  
Mike,

If I was designing an 8.0" coil today, I would use a flat primary made from 
.50" dia copper tubing wound with either 3/8" or 1/2" spacing between 
windings.  Just exactly what you are using.  With a 15 kv 120 ma power 
supply, I would expect better performance.  Have you adjusted the coupling 
between the primary and secondary?  Can you describe the gap in more detail?  
The coil can certainly use more toroid like at least twice what you currently 
have and up to three times if you have enough power supply to break it out.

With the right set up, your coil should be able to produce 10 foot sparks.

Ed Sonderman