Re: Adjusting coeff. of coupling --- with the coil running!!

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

Original poster: "Gerry Reynolds by way of Terry Fritz <teslalist-at-qwest-dot-net>" <gerryreynolds-at-earthlink-dot-net>

Dr R,

What is the final relative positions between the primary (I'm presuming flat
spiral) and the bottom turn of secondary.   Does this change from design to
design or do you see a trend.   Also, what is best coupling (what ever gives
the best spark or the largest K value)?

Gerry R
Ft  Collins, CO


 > Original poster: "Dr. Resonance by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >
 >
 > Adjust your coeff. of coupling --- with the coil running.
 >
 > We use a small 10 RPM DC gear motor mounting 90 degrees on an angle
bracket
 > and a stiff piece of phenolic rod which joins the motor to the brass rod
on
 > the bottom of the sec.   We use a short stiff 3/8 thick piece of brass
that
 > is tapped 3/8-16 (1/2-13 for larger coils) and affixed to the bottom of
the
 > upper piece of our "test stand".  We can stand back 15 feet and run the
 > motor which runs the sec both up and down --- while the coil is running!
 >
 > With new designs we can dial in the best coeff. of coupling in about 30
 > seconds.  Then we log the data so on future windings we can just start the
 > winding up the sec. the correct distance above the primary.
 >
 > If anyone wants to use it for tuning their coil at our Teslathon we will
 > have it available.  Just be sure you sec. botton has a 6 inch long x
3/8-16
 > brass stud sticking out of the bottom of your sec.  Drill a small 1/8th
 > hole crosswise through the stud near the lower end --- this will coupling
 > to our motor directly.
 >
 > We can hit the very best coeff. of coupling and give you another ft. of
spark!
 >
 > Dr. Resonance
 >
 > Resonance Research Corporation
 > E11870 Shadylane Rd.
 > Baraboo   WI   53913
 >
 >