JAVATC Calculations for this Mini SGTC

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Rechargeable Portable Spark Gap Tesla Coil for Science Demonstrations

Tom Meehan 12/06/2021 at 02:320 Comments

This is a copy of my inputs to JAVATC and the values it returned:  Mini Tabletop SGTC (inspired by Plasma Channel)

Calculations made using: J A V A T C version 13.1 - CONSOLIDATED OUTPUT

Units = Inches

Ambient Temp = 68°F

Surrounding Inputs:

• 100 = Ground Plane Radius
• 0 = Ceiling Height

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Secondary Coil Inputs:

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• 0.83 = Radius of Secondary
• 3.5 = Height 1 (start height of winding)
• 8.5 = Height 2 (end height of winding)
• 570 = Turns
• 32 = Wire AWG

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Primary Coil Inputs:

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Helical primary coil form (not a pancake coil)

• 2.83 = Height 1
• 3.368 = Height 2
• 11.0339 = Turns
• 0.0253 = Wire Diameter
• 0.0013 = Primary Cap (uF)

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Toroid :

• minor diameter = 1"
• major diameter = 4"
• height = 9" (above ground plane)

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Secondary Outputs:

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• 1132.46 kHz = Secondary Resonant Frequency
• 90 deg° = Angle of Secondary
• 5 inch = Length of Winding
• 114 inch = Turns Per Unit
• 0.00082 inch = Space Between Turns (edge to edge)
• 247.7 ft = Length of Wire
• 3.01:1 = H/D Aspect Ratio
• 40.3133 Ohms = DC Resistance
• 27605 Ohms = Reactance at Resonance
• 0.05 lbs = Weight of Wire
• 3.88 mH = Les-Effective Series Inductance
• 4.028 mH = Lee-Equivalent Energy Inductance
• 3.912 mH = Ldc-Low Frequency Inductance
• 5.091 pF = Ces-Effective Shunt Capacitance
• 4.903 pF = Cee-Equivalent Energy Capacitance
• 8.236 pF = Cdc-Low Frequency Capacitance
• 2.73 mils = Skin Depth
• 3.764 pF = Topload Effective Capacitance
• 134.7194 Ohms = Effective AC Resistance
• 205 = Q

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Primary Outputs:

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• 1132.45 kHz = Primary Resonant Frequency
• 0 % = Percent Detuned
• 90 deg° = Angle of Primary
• 8.67 ft = Length of Wire
• 140.4 mOhms = DC Resistance
• 0.023 inch = Average spacing between turns (edge to edge)
• 0.666 inch = Proximity between coils
• 0 inch = Recommended minimum proximity between coils
• 15.193 µH = Ldc-Low Frequency Inductance
• 0.0013 µF = Cap size needed with Primary L (reference)
• 0 µH = Lead Length Inductance
• 29.604 µH = Lm-Mutual Inductance
• 0.121 k = Coupling Coefficient
• 0.122 k = Recommended Coupling Coefficient
• 8.26 = Number of half cycles for energy transfer at K
• 3.62 µs = Time for total energy transfer (ideal quench time)

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I'm putting together a few diagrams to make values like major and minor diameter of toroid, as well as the various heights mentioned.  There may be some missing dimensions (like insulation on wire in primary coil)  but I will add these.