Restrict Amps with Source Voltage Amplitude

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hey guys have you checked  http://www.alexpetty.com/2011/06/16/simple-wfc-energization-circuit-by-alex-petty/

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from Alex's circuit,he use gate freq=50 hz,pulse freq=10 khz.

-80mH and 20nF,from calculate resonant=3978.87 hz
-40mH and 20nF,from calculate resonant=5626.98 hz

he said 40kv but no use correct resonant frequency.why??---->harmonic frequency.from 50 hz and 10 khz to hit resonant frequency!! i think.

thanks
geenee

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-80mH and 20nF,from calculate resonant=3978.87 hz
-40mH and 20nF,from calculate resonant=5626.98 hz

You're a little off with your numbers there...they should be:

80mH & 20nF = 2814 Hz
40mH & 20nF = 3979 Hz

*rounded to nearest whole number*

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what equation do you calculate(LC)? Tonywoodside.

thanks
geenee

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(http://sub.allaboutcircuits.com/images/12091.png)

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To Tonywoodside.
about basic voltage control circuit.if use tip120 with 3055 then impedance will be high(Z=15Mohms).if impedance matching,Z primary=Z secondary.impedance of secondary =15Mohms --->very big coil???i am not good in electronic. Is impedance matching importance??

thanks
geenee

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Yes, impedance matching is very important in electronics. It allows the most efficient power transfer and a perfect signal.

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That's right TS! The way the power supply is configured, it will keep the transformer from becoming saturated.

Here's a simple way of making the Voltage Control for testing purposes.

Just added this inline with the coil.  I am FINALLY getting a gated wave form I have been looking for!

The voltage control is a definite must have to make this work.

TS