I have used java TC to build the last 2 coils seems like the geometry of the primary is critical. My building experience is many decades without software. The last 2 primaries do not use adjustment they are fixed one is 4 turns one is 7.5 . A change in the geometry by as little as an eight of an inch can make a big difference in the software. Primary changes to coupling,.height changes, turn spacing.. On some coils I have made the tuning was very sharp like was said loose coupling very sharp tuning when connection to primary was changed by very little. No sparks to very big ones.
On Monday, February 18, 2019, 04:09:41 PM PST, Antonio Queiroz <acmdequeiroz@xxxxxxxxx> wrote:
Em 18/02/2019 17:33, Gary Lau escreveu:
> Assuming that you still have those sliding secondary coils to facilitate
> coupling adjustment, can you slide them while the coil is running and see
> if spark length strictly diminishes with lower coupling, or if there are
> any peaks or nulls along the way?
>
> Gary Lau
> MA, USA
>
This is an analysis that I have made long time ago. Coupling has effects
that vary periodically just when the coupling is very high. In the
normal cases greater coupling increases the output because losses are
reduced. With low coupling tuning has greater effect.
http://www.coe.ufrj.br/~acmq/tesla/scan.html
Antonio Carlos M. de Queiroz
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