Re: More Coupling...

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Terry, 

Tesla list wrote: 
>
> Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net> 
>
> Hi All, 
>
> I retook the physical measurements of my coil and measured the capacitance 
> from primary to secondary.

Thanks for sharing this detail. I checked it against how I modeled your coil,
and the only thing different on the secondary was the "spacing" between turns
by only 0.0001" off. When I adjusted the spacing (0.0088 to 0.0087), the turns
went from 997 to 1000.7. 

On the primary I was off by 0.1" on the ID, so it also modeled very well. I
know you used full turns this time around. 

This tells me the previous acmi run I did with your coil was pretty darn close
to actual. Thanks for the graph of your measurements. It shows the current
variation throughout the test which we knew would occur and further supports
concentric volt amp readings. Also, Excel snapshot is a better way to display
the data. I think I'll steal that idea for displaying acmi results of coiler
coupling data. 

Take care, 
Bart 
>
>   
> I have the center of the primary plane 16.875 inches off the floor. 
> The inner primary radius is 5.95 inches. 
> There outer radius is 13.38 inches. 
> The primary tubing diameter is 0.252 inches. 
> There are 19.563 primary turns. 
> The secondary is still 10.25 x 30.0 inches. 
> There are 1000.5 turns 
> The secondary wire is 0.0201 inches in diameter. 
> The split 6 leg foil ground plane is on the floor but it is not connected 
> to anything. 
> The primary and secondary are floating. 
> My primary and secondary spiral (out and up) in the same direction. 
>
> Pictures at: 
>
> <http://hot-streamer-dot-com/TeslaCoils/Temp/acmi1.jpg>http://hot-streamer-dot-com
> /TeslaCoils/Temp/acmi1.jpg 
> http://hot-streamer-dot-com/TeslaCoils/Temp/acmi2.jpg 
>
> The primary to secondary capacitance measures: 
>
> Height (inches) Capacitance (pF) 
> 0                       42.2 
> 1                       36.4 
> 2                       33.7 
> 3                       29.4 
> 4                       27.6 
> 5                       25.8 
> 6                       23.6 
> 7                       22.6 
> 8                       21.8 
> 9                       21.1 
> 10                      19.8 
> 11                      19.4 
> 12                      19.0 
> 13                      18.5 
> 14                      18.0 
> 15                      17.6 
>
> I'll try to do and report on more tonight as time permits. 
>
> Cheers, 
>
>         Terry