Re: best coupling clearance

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


A good value for k for classic Tesla oscillators (not magnifiers) is between
0.16 to 0.22.

It depends on the dia. of your sec coil, but usually the start of the sec.
is 1 inch to 3 inches above the horizontal plane of the primary, ie, primary
is below sec.

Terry F. has a website source to enable you to do calculations on your k
prior to doing any coil winding.

It's always better to have k too loose rather than too tight.  Overcoupling
produces a lot of problems starting with "racing sparks".

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913

 > When all is said and done,  does the primary winding end up above or below
 > the bottom turn on the secondary???   Seems like K is decreased as the
 > primary is lowered below this bottom turn and is increased as the primary
is
 > raised above the bottom turn.  Should one try to maximize K without
getting
 > racing sparks or secondary to primary breakdown???