Looking at figure 1 below can give you a somewhat better idea. This is a relatively simplistic explanation of a phase-locked-loop PLL with a vco because whole books have been devoted to phase locked loops offering varying degrees of mathematical complexity. It is not a subject with which you can safely take a casual approach. A vco stands for "voltage controlled oscillator" which has been dealt with earlier in a discrete form. Turning our attention to figure 1 we first see a fixed 1 Mhz oscillator, depending upon our application, we try to make this as precision as possible consistent with our goals. This oscillator usually comprises TTL gates.
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Those graphs show what center frequency, minimal frequency and maximum frequency can be obtained with different values of C1, R1, R2. I am building this circuit. And with the tables on the datasheet for CD I am getting center frequency of a little bit less than 6MHz. Tesla coils as big as mine cannot work at such high frequency.
I have a Tesla coil secondary that is a little different than the one that the author used for his circuit. I would like to use this Secondary. For this reason I would like to play around with the values of the R1 , R2 and C1 to make sure that this circuit produces the resonant frequency of my secondary. The resonant frequency of my secondary: turns of 0. The resonant frequency is about KHz but my calculations may be wrong.
How big does the current in the primary circuit need to be? How thick should the wires be in the primary side of this circuit? Would attaching a thick primary coil, made out of a telephone cable with all strands tied together in parallel make sense if I am using 0. Should I redesign my circuit to use banks of smaller capacitors instead, to make the total diameter of the leads greater?
Thank you!
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