Re: How to rise the secondary? (fwd)

---------- Forwarded message ----------
Date: Thu, 16 Jul 1998 06:02:31 +0000
From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: How to rise the secondary? (fwd)

  John F. -

  I was reviewing your March and April posts of 1997 and found that you have
forgotten that some of your tests agree with what I have been saying.

  Good tuning is a prerequisite to good quenching
  At K = .11 got 1st notch quench
  At k = .16  quench moved to 2nd notch and destroyed secondary
  Sparks were longest at low K values. The JHCTES program agrees

  March 30,1997
  You made 6 tests with your coil by raising the secondary. You said you
thought that the best output was when the bottom of the secondary was almost
level with the primary compared to the raised positions..

  John Couture


At 02:58 PM 7/14/98 -0600, you wrote:
>---------- Forwarded message ----------
>Date: Tue, 14 Jul 1998 10:42:49 EDT
>From: FutureT-at-aol-dot-com
>To: tesla-at-pupman-dot-com
>Subject: Re: How to rise the secondary? (fwd)
>In a message dated 98-07-14 00:55:08 EDT, you write:
><< snip> Quenching is
>> not changed by coupling but it may be changed by tuning and other
> >  John Couture
>  >>
>John, all,
>If only that were true....  Then we could all couple our TC's at k = .385, 
>k = .6, etc, and quench them easily at the first energy transfer or notch.
>It won't happen using a spark gap (unless there's a breakthough
>in quenching).  Crossed H2 thyratrons can do the job.
>Coupling affects the quench because tight coupling causes faster
>energy transfer which means there's less time available during the
>"notch" for de-ionization to occur within the gap.  Also, fast energy
>transfer means less losses in the gap, so there's more energy
>available to *want* to reflect back to the pri after the first transfer.
>In other words it's more likely the gap will re-ignite after the first
>energy transfer with tight coupling.
>This has all been discussed innumerable times on this list and
>elsewhere.  Fiddling with primary tuning or other adjustments does
>not solve this.  Have you looked at Terry's valuable papers which
>show these effects clearly?
>John Freau