Re: [TCML] tesla coil did not work

[bartb <bartb@xxxxxxxxxxxxxxxx>]

Your hypothetical calculation of 450kHz is way off. The 170kHz makes 
sense with say a 12cm x 48cm toroid in place or near that size. Your 
primary however is tuned to about 70kHz. Reducing the tank cap size to 
about .03uF would be a good place to start. Regarding your schematic. I 
don't understand the gap next to the resonator. Move your tank cap and 
put it in series with the primary (right where that 2nd gap is located) 
and lose the 2nd gap. Even then, the whole resonator is completely out 
of tune and much work is needed. I recommend using Javatc or similar 
program so you know what to expect with all the LC components.

Take care,
Bart

tuna ayan wrote:
> primary coil: 8 turn, smallest radius 11cm, largest radius is 19cm.
> secondary coil: ~1250 turn, radius 6cm.
> primary capacitance : 0.16 uF
> HV transformator : 5kv 250mA
>
> our circuit design:
> http://img176.imageshack.us/img176/3343/37331903.png
>
> when we operated the circuit only spark gap worked properly. secondary coil
> did not work since we did not observe any arcs at toroid.
>
> We suspect that this failure was because of unmatched frequencies. We have
> hypotetically calculated our resonant frequency as 450 kHz, however when we
> applied a sinusoidal wave to the primary coil, we have seen a similar
> sinusoidal only at 170 kHz. What do you suggest us to match those
> frequencies and what else might be the reasons for the setback. Thanks.
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