Re: Sync gap test 3

["Tesla list" <tesla-at-xxxxxxxxxx>]

Original poster: Esondrmn-at-aol-dot-com 

In a message dated 12/2/00 4:48:50 PM Pacific Standard Time, tesla-at-pupman-dot-com 
writes:

<< Ed,
 
 This sounds like you are saying that 120 BPS operation is too much for your
 coil.
 I can't see how. My gut feeling is that something else went wrong somewhere
 between the break changes or the cap change. My guess is that either the 
tuning
 or coupling was "way" off causing the initial breakouts and eventually
 secondary
 breakdown. Is the coil not repairable? If so, it would make a nice test coil 
to
 identify the "real" problem.
 
 Bart >>

Bart,

I have had this coil operating in various configurations for a couple of 
years.  I know all of it's component values quite well, both from 
measurements and calculations.  Using these, I have reverse calculated the 
toroid capacitance, then used that in further calculations to find the 
correct tap point with different amounts of capacitance - and have always 
came up with the correct actual tap point, verified later by running the coil 
and confirming the best tap point for tuning.  The tap point for the .008 ufd 
cap was turn 12 and the tap point for the .0321 ufd cap was calculated at 
turn 6.5.  This may not be exactly the best tuning point, but should be quite 
close.

I am still thinking that coupling is the problem.  The lowest secondary turn 
was right even with the top surface of the primary, or maybe .10" above it.  
I suspect this was perhaps tightly coupled but ok for the power levels I was 
using but too tight for the much higher power the .032 ufd cap and 120 bps 
was providing.

I have already stripped the wire off the secondary and plan to rewind it.

Ed Sonderman