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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
>
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