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Re: True Toroid Capacitance
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