OOPPPpppsss I did the same thing, the L/W I wanted to say was 5:1 ratio
e.g. a secondary of 5' tall at 1' dia...
hope I didnt confuse everyone. My chemo meds mess with my head and thinking
process alot. And its the reason I
had to stop enjoying coils too, realized that I could make a mistake too
easily.
SD
On Wed, Sep 6, 2023 at 4:25 PM <jan@xxxxxxxx> wrote:
> Hi Amir,
> I had a larger spark gap coil, but the principles are the same. On my
> website there is some informtion about my coil desigm.
>
> https://sthlmteslacoil.se/coil-components.html
> https://sthlmteslacoil.se/measurements.html
>
> A 4" coil form is about right for a 5 kW coil but too small for a 10 kW
> design. You would need 150-200 mm and about 9 mm copper tubing for the
> primary. .
> About 100 nF would be in the ball park for the primary cap. Mind you that
> the charging circuit is a resonant circuit, if designed right it will
> charge the cap to nearly double the transformer peak voltage. If not right
> designed according to the suggestions of Mr Burnett, you will loose much of
> the available energy and also get a lousy power factor to the power grid.
>
> Use a tesla coil design software like Java TC, and do a simulation in LT
> Spice for the charging circuit. You can use mine from the website but
> change the component values.
>
> If you design for a low bps you will need a synchronous spark gap, but for
> bps of 300 or higher an asynchronous gap will do just as well and be easier
> to construct.
>
> Good luck,
> Jan
>
> Hi all,
>
> I was wondering if I could ask for guidance on a Tesla coil I am working
> on - I want to make the smallest Tesla coil (primary and secondary) with
> the supplies I have:
>
> - 10kVA pole transformer (240V/14400V)
> - a Lincoln Arc Welder (as a current-limiting ballast for the pole
> transformer)
> - (2) 0.22uf 50kv Maxwell capacitors (could be in series for 0.11uf)
> - (2) 0.03uf, 35kv Maxwell capacitors (could be in parallel for 0.06uf)
> - Copper Tube Gap Spark Gap
> - Async Rotary Spark Gap w/ Black and Decker Motor
>
> If I run the pole transformer with the current-limiting welder set to the
> lowest setting (ie, 40A), what would be the optimal tank capacitance value
> to use?
>
> Also, on the lowest setting of the welder, what would be the advised
> minimum diameter for a secondary coil (ie, would a “4 inch secondary be too
> small?) and the minimum thickness of a primary coil (ie, would 1/4” copper
> tubing be too thin)?
>
> Any suggestions or guidance would be greatly appreciated!
>
> Will report back with photos as I progress!
>
> Thanks!
> Amir
>
>
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