Re: Primary Coil Under Secondary Coil -Reply
In a message dated 99-01-14 04:16:38 EST, you write:
> along the same vein has there been any study on what occurs
>when the primay is located at different points along the secondary.
> e.g. usual placement at base verses midpoint of the secondary,ect.....
> robert cressler
> oregon city,ore
If the primary is placed at the midpoint, the coil sparks from both
ends if neither end of the secondary is grounded...so it becomes a half
wave coil. If one end is left grounded, there's a high likelilhood of
flashover from primary to secondary. However, in tube coils, it is
possible to raise the primary a lot relative to the secondary, and it
has the effect of changing the tuning. In fact this method can sometimes
be used to tune a tube coil that isn't tuned correctly. Just raise the
primary until the spark is strong. I haven't really explored the
phenomenon, in fact it was a friend of mine who used the technique,
and told me about it quite a few years ago.