fine tuning a secondary coil

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <DR.RESONANCE-at-next-wave-dot-net>


Now that you have your coil running and in a state of "tune" then you need
to do some "fine tuning" by adjusting the coefficient of coupling between
primary and sec. to achieve optimum performance.

Try using some scrap 1/2 in. plywood wedges under the sec. coil to elevate
it in 1/2 in. increments.  As you do there will be a "sweet spot" where the
coeff. of coupling is just correct to allow maximum energy transfer.

It takes a bit of time but is well worth the effort.  It also allows yours
caps to run without possibility of any destructive energy reflections from
the secondary coil as it's magnetic field collapses.

Best regards,

D.C. Cox

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, July 04, 2002 10:28 PM
Subject: Reporting


> Original poster: "cd by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<vbprg1-at-hotmail-dot-com>
>
> Hello everyone
>
> I would like to report SUCCESS
> with 1x 12000v 30ma NST  at 90 percent power on the variac
> I have created 12inch sparks
>
> I am still narrowing in on optimal tuning but here is what it took
> perhaps this will help someone else
> all tests run up to 90 percent power
> test1
> tap 12 turn  TOPLOAD large torus- no sparks weak glow in f tube
> test2
> tap 10 turn - TopLoad Aluminum pan- very small sparks
> test 3
> tap 12 turn TopLoad aluminum pan - no sparks
> test 4
> tap 8 turn Topload aluminum pan - no sparks
> test 5
> tap 10 turn Topload aluminum can - 2-4 inch sparks
> test 6
> tap turn 11 Topload Aluminum can - no sparks
> test 7
> tap turn 9 TopLoad Aluminum can - 10 - 12 inch lightning :
>
> Further testing remains to be done with the 4 torus's I have built
> but I thought you guys might like to know
> I GOT MY FIRST COIL TO MAKE LIGHTNING
> WHOOOOOOHOOOOOOOO
>
> Thanks for all the great information
> Chris Dowdy
>
>
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>
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>