Kapanadze Cousin - DALLY FREE ENERGY

[TinselKoala]

It's not that hard to make a lower-frequency train of higher-frequency pulse packets, with one or both frequencies phase-locked to a resonating coil set.

Use a 4046 PLL configured to oscillate and lock at your higher frequency coil resonance. Send its output to a Schmitt trigger inverter through a capacitor-resistor pulse-width control (as in Tomtech's schematic P1 pot and C1 cap), then to a gate driver chip to drive your mosfets. Then use something like a 555 timer to pull the 4046's "enable" Pin 5 High and Low, to produce your "pulse packets" with variable frequency and duty cycle. Or even use another 4046 PLL to do the same thing, only at lower frequency than the first one.

If that's what you are trying to do, that is.

@Tom: the Blue trace is probably the output of the second of the inverter gates.  Pin 11.

[T-1000]

It's not that hard to make a lower-frequency train of higher-frequency pulse packets, with one or both frequencies phase-locked to a resonating coil set.

Use a 4046 PLL configured to oscillate and lock at your higher frequency coil resonance. Send its output to a Schmitt trigger inverter through a capacitor-resistor pulse-width control (as in Tomtech's schematic P1 pot and C1 cap), then to a gate driver chip to drive your mosfets. Then use something like a 555 timer to pull the 4046's "enable" Pin 5 High and Low, to produce your "pulse packets" with variable frequency and duty cycle. Or even use another 4046 PLL to do the same thing, only at lower frequency than the first one.

If that's what you are trying to do, that is.

From electronics point of view this is what Ruslan and akula use. If you can provide full working circuit with PLL for LC resonance on induction heater circuit which also controls timing of second generator with PLL for Tesla coil resonance this will make life easy for most guys here.. That also can be brought down for single design to work on and any problems with that can be solved quickly.

[TinselKoala]

Here's an example. The purple trace is the output from the 4046 PLL used as VCO, tuned down to give a 15kHz square pulse at 50 percent duty cycle. The light blue trace is from the output of the first gate of the 74HC14N schmitt trigger inverter, which is the output to a mosfet gate driver chip.  The pulse width is very narrow (about 840 nanoseconds) because my "C1" value is only 100 pF.  (I actually have the pulse width set to its maximum value for this screenshot; the circuit is actually designed to produce pulses of less than 100 ns, at 250 kHz, to the mosfet gate.)

[TinselKoala]

From electronics point of view this is what Ruslan and akula use. If you can provide full working circuit with PLL for LC resonance on induction heater circuit which also controls timing of second generator with PLL for Tesla coil resonance this will make life easy for most guys here.. That also can be brought down for single design to work on and any problems with that can be solved quickly.

Well, I don't know about that... But here are some things for you to chew on. The scopeshot shows the pulse packets from a similar circuit (4046, inverter, discrete gate driver, 555 interruptor) , and the other two images show the basic PLL section and the 555 timer interrupter that made the scopeshot. This one doesn't provide pulse width control of the faster oscillations (no "C1-R1" between inverter and gate driver) though.

[TinselKoala]

Here's the schematic for the 555 interruptor, which is connected to the Pin 5 of the PLL chip. Or, you can make another PLL circuit that has capacitor and resistor values appropriate for the second frequency and connect that to the first PLL's Pin 5 instead.

The Data Sheet for the 4046 PLL chip will tell you how to design the circuit for the specific frequency ranges you need.