Re: New coil troubles

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>

Tesla list wrote:
>
> Original poster: "Barton B. Anderson" <tesla111@xxxxxxxxxxxxx>
>
> Regardless of the coils pri to sec arcing, k is rather high and likely
> problematic, especially if your attempting to tune the coil. Thus, it's
> best to lower k to a relaxed value and then tune the coil. After it's
> tuned, one can play with coupling for best performance. In the end, I would
> bet k will be set around 0.15 which may leave plenty of pri to sec distance
> to prevent arcing. Someone here had mentioned this coil appeared to be
> forced into breakout. I would agree, that is a perfect description for this
> coils troubles.

With low coupling, the operation of the coil becomes less sensitive
to the tuning. It's really easier to find the exact point with low
coupling, because the changes are more clearly visible, but with high
coupling, the tolerance is wider, and the coil works even with a
large tuning error. It can really said to be "forced into breakout".

Antonio Carlos M. de Queiroz