Re: Dual Coils

["Malcolm Watts" <M.J.Watts-at-massey.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

On 14 Aug 00, at 7:50, Tesla list wrote:

> Original poster: "Jorge F." <jorgetesla-at-hotmail-dot-com> 
> 
> 
> Hello everyone,
> 
> I,ve seen several coils that have twin coils(out of phase from each 
> other).My question is ?how do you go on designing this coils??
> 
> Do you match the transformer and the cap the usual way??
> 
> And i have no idea on the primary's and secondary's. I know they should be 
> mirror images of each other (primaries wound in opposite directions). But 
> how do you split the coils in two???
> 
> suggestions??

There is no magic. You don't have to wind coils in opposite 
directions for some designs. Here is a really easy way to do 
it:


base of     |   |   driver secondary  |   |
resonator 1  --- _______UUUUUUU________---  base of 
                           +              resonator 2
                         ground
                          tap

Anti-phase polarity is established by the driver. Think of a 
pushpull circuit (which it actually is).

Regards,
Malcolm