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Re: New coil parameters for check


>
> Original Poster: "Andy Cleary" <gemware2-at-dreamscape-dot-com>

(sending again due to List ISP problems) 

Hi Andy, 

Well, I see 2 problems with this design. 

First, the cap size with a primary of 4.2 turns would need to be 0.46uF! This
is way too large by a magnitude. I assume, there is something wrong with the
input values used in WinTesla. I don't use it (it won't install on my pc due to
my pc - I've got the same problem with JHCTES program). However, if you
increase your primary turns to around 13.5, then you end up with a more
realistic cap size of 0.04uF. I'm not sure what your planning on using for a
cap size, but 0.04uF and 13.5 turns would actually be a nice choice for this
coil. 

Secondly, the output of the supply transformer is low. I would seriously
consider increasing the supply voltage. You should make the cap capable of at
least 2.5 times the output supply. If you double the voltage processed, you
increase your power processed by 4, and thereby increase spark length
potential. 

This coil is large enough to process quite a bit of power. Yes, a pole pig
would make a nice supply for it, but it's not the only source of high power. A
potential transformer or stacked NST's would also do well. 

Take care, 
Bart 
>
>   
>         I am planning a new Tesla coil, to be shown at the Electrothon 2000 
> demonstration this June.  If you would take a glance at the following data 
> (Direct from Wintesla), I would be delighted to hear your comments.  The 
> only thing that I am concerned about is the small number of primary turns 
> required (4).  That is probably due to the low voltage, high current 
> transformer.  Is that low number acceptable?  I would also like the system 
> to be capable of using a pole pig in the (hopefully near) future. 
>
> Primary Transformer Output Voltage (VAC) 
> 5000.0000 
> Primary Transformer Rated Current (AMP) 
>  0.6400 
> Primary Transformer Input Frequency (HZ) 
> 60.0000 
> Primary Transformer Input Voltage (VAC) 
> 115.0000 
> Primary Coil Inside Diameter (IN) 
> 10.5000 
> Primary Coil Wire Diameter (IN) 
>  0.2500 
> Primary Coil Wire Spacing (IN) 
>  0.2400 
> Primary Coil Number of Turns 
>  4.2000 
> Primary Coil Angle From Horizontal Plane (DEGREES) 
>  0.0000 
> Secondary Wire Diameter (IN) 
>  0.0285 
> Secondary Coil Total Outside Diameter (IN) 
>  8.5000 
> Length of Secondary Coil (IN) 
> 45.0000 
> Secondary Wire Gauge 
> 21.0000 
> Secondary Turns/Inch 
> 33.3333 
> Top Load Capacitance (PF) 
> 32.9609 
> Sphere Radius/Toroid Tube Diameter (IN) 
>  6.0000 
> Toroid Diameter Tube Center-to-Center (IN) 
> 25.0000 
>
> -Thank you again, I cherish your advice, 
>
> Andy Cleary