Re: JavaTC and ETesla6 Questions

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Adam,

The toroid capacitance for Java TC is too high.  I "think" you want 33.36pF
- The seconday coil's self capacitance of about 24pF for toroid
capacitance.  That is about 9.44pF.

33.36 - 23.92 = 9.44pF

Cheers,

	Terry


At 11:06 AM 9/1/2002 -0700, you wrote:
>Please excuse the long post.
>
>I'm getting ready to build another coil, and was
>attempting to use JavaTC and ETesla6, when I ran into
>something that didn't seem right. To begin with, I
>plugged the following into JavaTC:
>
>Secondary Diameter		8.125
>Secondary Height		69
>Bare Wire Diameter		.0403
>Insulation Thickness		.0014
>Spacing Between Turns		0
>Toroid Major Diameter		24
>Toroid Minor Diameter		6
>Sphere Diameter			0
>Top Terminal Reduction		0
>
>Which gave me:
>
>Number of Turns			1600.9
>Inductance			58.22
>Toroid Capacitance		26.5
>Loaded Resonant Frequency	85.69
>
>OK so far.
>
>Then I used the following in ETesla6:
>
>*Grid Size
>150
>*Units of Measure
>*1 = mm
>*2 = cm
>*3 = inches
>*4 = Feet
>*5 = meters
>3
>*1-Bare 2-Terminal
>2
>*Ceiling Height
>188
>*Wall Distance
>120
>*Primary Inner Turn Height
>24
>*Primary Inner Diameter
>11.125
>*Primary Outer Diameter
>22.375
>*Primary Outer Turn Height
>24
>*Strike Rail Height
>0
>*Strike Rail Diameter
>0
>*Secondary Base Height
>25
>*Secondary Diameter
>8.125
>*Secondary Winding Length
>69
>*Meaured Secondary Inductance
>58.22
>*First Top Terminal Center Height
>94
>*First Top Terminal Cord Diameter
>6
>*First Top Terminal Center to Center Diameter
>18
>*Second Top Terminal Center Height
>0
>*Second Top Terminal Cord Diameter
>0
>*Second Top Terminal Center to Center Diameter
>0
>*Top Terminal Voltage
>100
>*Begin Run Approval
>1
>
>Which gave me:
>
>Ccalc		33.36432
>Fcalc		114193.89
>
>Here's where it get's wierd. In order to "force"
>JavaTC to match these results, I had to enter 97.6%
>for Top Terminal Reduction. Is that possible? Surely I
>made a mistake somewhere.
>
>thanks
>Adam
>
>=====
>Adam Minchey
>yurtle_t-at-yahoo-dot-com
>http://www.geocities-dot-com/yurtle_t/index.htm
>