Re: Magnet Wire Sources

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

Original poster: "Daniel Barrett" <dbarrett1-at-austin.rr-dot-com> 


 > Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
 > On your upper base assembly add a small drilled and tapped 1 x 1 inch x
3/8
 > inch thick piece of brass.  The sec coil should also have a brass stud out
 > ...
 > speed elec. drill or small DC gearmotor.

     Great idea! I'll do that on the new sec for a real time adjustment.

 > Most experimenters way over-couple their coils and lose performance that
 > they are not even aware is available.

Hmmm... When I was bringing up model #1 I set the coil on a series of 1/4
inch thich plywood slabs and took K and spark length measurements for a
range of sec heights from 0 inches (definied as sec bottom turn level with
pri plane) all the way up to about 2 inches. I found that the spark length
went up as coupling went up, until the point of racing arcs. I didn't see
anything like a peak at a given K level, rather just an increase until
flashover....

 > After you do this with your proposed 8 inch coil please report back to the
 > list the results of your experiments.  I'm betting with an 8 inch dia.
coil
 > you will require an elevation of around 5 inches (first lower turn to sec
to
 > horizontal plane of primary measurement).  Let us know your results.

     I'll definietly do that. However, on model #1, I know I would have
almost no output at 5 inches- the fun begins at about 1 inch. Do you think
this is because of the lower power level? It runs about 1.44kVA, 8J/bang.
I'm puzzled here because my results seem so different from yours...

db