Re: How to rise the secondary? (fwd)

---------- Forwarded message ----------
Date: Mon, 13 Jul 1998 22:17:07 -0700
From: lod-at-pacbell-dot-net
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: How to rise the secondary? (fwd)

"John H. Couture" wrote:

>   Coupling is not a critical adjustment for Tesla coils and exact coupling
> is not necessary. In fact, when the secondary is raised if only the
> coupling changed the only change would be a reduction in the TC output. The
> reason the output does change is because the tuning changes and this is very
> important and must be precisely set to obtain maximum output from the TC.

What you say makes sense from a theoretical standpoint, 
but _ONLY_ from a theoretical standpoint!  Otherwise,
why doesn't your program suggest a coupling around 0.6
or higher, to efficently transfer in a single cycle? 

If one gets up from the ol' armchair and ventures to put
actual equipment at risk, it is prudent (if not essential)
to be able to alter the coupling.  How is it possible for 
one to know beforehand the ultimate quenching capabilities 
of their rotary gap?  The coupling value must accommodate
the capabilities of the gap, to avoid excessive gap ablation
and obtain maximum performance.

Until your program can predict the quench performance of a
given gap electrode geometry, you must necessarily be able
to adjust the coupling in order to get optimum results.