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Re: True Toroid Capacitance



Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Hi John,
Just to add to this. Tonight I unzipped and ran the version 6.12. There was 
no difference, so I can only assume you must have different inputs to cause 
the disagreement. It makes sense that v6.12 and v6.13 would be the same for 
loaded coils, as 6.13's main update was for the Les factor on bare coils.

I also noticed in the output.txt stream I attached in the previous post 
that Terminal-2 Height showed the same value as Terminal-1 Height even 
though the input.txt did not include a second terminal. I checked both 
versions and this occurred in both. This oddity appears to be an artifact 
carried over from earlier versions (not affecting Fres or C values, just 
written to screen or output.txt in the Terminal-2 Height).

Take care,
Bart

Tesla list wrote:

>Original poster: Bart Anderson <classi6-at-classictesla-dot-com>
>Hi John,
>
>>However, this was at 229.58 KHz and not at the measured frequency of 238.25
>>KHz. I do not know why E-Tesla6 shows a different resonant frequency with
>>the same toroid and Sec inductance of 18.78 mh because the surrounding
>>conditions are the same.
>>
>>This new TC research needs to be verified with additional testing and all
>>comments are welcomed.
>
>
>
>I just ran E-Tesla6 with your 18.78mH input:
>C=23.29pF    F=240.65 kHz
>
>Pretty close to Javatc and well within the margin of error against 
>measured to programs values for both programs. Is it possible you may be 
>using the old version 6.12? The current version is 6.13C. To check it, 
>I've copy/paste the output.txt file from my run with E-Tesla6 for 
>reference. If you see an input disagreement, that may also explain your 
>numbers.
>
>Take care,
>Bart
>
>-----------------------------------------------------
>E-TESLA  V6.13C  July 26, 2003
>Grid Size = 200.000000
>Scale Multiplier = 1.000000
>Terminated Coil
>Ceiling Distance = 150.000000
>Wall Distance = 103.000000
>Primary Height (Inner Turn) = 13.835000
>Primary Inner Diameter = 5.970000
>Primary Outer Diameter = 13.950000
>Primary Height (Outer Turn) = 13.835000
>Strike Rail Height = 0.000000
>Strike Rail Diameter = 0.000000
>Secondary Base Height = 13.835000
>Secondary Diameter = 4.538500
>Secondary Length = 20.165001
>Secondary Turns = 900.000000
>Secondary Wire AWG Size = 24.000000
>Secondary Inductance (mH) = 18.780001
>Terminal-1 Height (center) = 36.500000
>Terminal-1 Cord Diameter = 4.500000
>Terminal-1 C-C Diameter (toroid only)= 14.750000
>Terminal-2 Height (center) = 36.500000
>Terminal-2 Cord Diameter = 0.000000
>Terminal-2 C-C Diameter (toroid only)= 0.000000
>Top Voltage = 100.000000
>Pass     Ccalc (pF)          Change            Fcalc (Hz)
>  1000   C=16.47939       Err%=1647839.375000       F=286089.34
>  2000   C=20.13227       Err%=22.166338       F=258836.73
>  3000   C=21.50607       Err%=6.823863       F=250433.13
>  4000   C=22.16243       Err%=3.051977       F=246696.86
>  5000   C=22.52905       Err%=1.654248       F=244681.34
>  6000   C=22.75677       Err%=1.010779       F=243454.05
>  7000   C=22.90824       Err%=0.665608       F=242647.84
>  8000   C=23.01330       Err%=0.458590       F=242093.36
>  9000   C=23.08799       Err%=0.324553       F=241701.45
>10000   C=23.14191       Err%=0.233543       F=241419.72
>11000   C=23.18114       Err%=0.169545       F=241215.31
>12000   C=23.20989       Err%=0.123984       F=241065.92
>13000   C=23.23097       Err%=0.090832       F=240956.52
>14000   C=23.24648       Err%=0.066787       F=240876.09
>15000   C=23.25791       Err%=0.049147       F=240816.92
>16000   C=23.26634       Err%=0.036256       F=240773.28
>17000   C=23.27256       Err%=0.026715       F=240741.13
>18000   C=23.27715       Err%=0.019760       F=240717.34
>19000   C=23.28053       Err%=0.014517       F=240699.88
>20000   C=23.28305       Err%=0.010790       F=240686.89
>21000   C=23.28485       Err%=0.007749       F=240677.56
>22000   C=23.28618       Err%=0.005692       F=240670.70
>23000   C=23.28714       Err%=0.004142       F=240665.73
>24000   C=23.28785       Err%=0.003054       F=240662.05
>25000   C=23.28840       Err%=0.002354       F=240659.22
>26000   C=23.28870       Err%=0.001304       F=240657.66
>27000   C=23.28901       Err%=0.001304       F=240656.08
>28000   C=23.28917       Err%=0.000685       F=240655.25
>29000   C=23.28927       Err%=0.000439       F=240654.73
>30000   C=23.28932       Err%=0.000238       F=240654.44
>31000   C=23.28935       Err%=0.000112       F=240654.31
>32000   C=23.28937       Err%=0.000097       F=240654.19
>
>
>
>
>