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4hv.org :: Forums :: Tesla Coils
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The self-capacitance for the secondary coil (Helical Coil)
Move Thread LAN_403
Zeeb
Fri Feb 17 2012, 02:27PM Print
Zeeb Registered Member #4398 Joined: Wed Feb 08 2012, 07:04PM
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Posts: 10
 		C = KD where D is diameter in centimeters and K is a constant which is dependent on the coils height and diameter ratio

Now i got my ratio to 6(457mm/ 76mm)

According to this site Link2
The value of K should then be 0.92

So i get C = 0.92*7.6 = 6.99

When i do the calculations on this site with the help of a program that calculates the capacitance of an helical coil Link2 i get the number 6.558 for the capacitance

Any ideas why they differ?
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