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Re: TSG beginner Questions



Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, November 28, 2001 8:43 PM
Subject: Re: TSG beginner Questions


> Original poster: "Jon Tebbs by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jgtebbs-at-eos-dot-net>
>
> Hi Jim, All,
>
> Tesla list wrote:
> >
> > Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <jimlux-at-earthlink-dot-net>
> >
> snip--
> >
> > The idea is to trigger the spark gap as the primary cap reaches peak
> > voltage, but not before.
> snip--
> > With a triggered gap, same spark same time, every time.
> >
>
> If one has taken an oscilloscope to look at the currently accepted
> dimmer based driver, one may note the timing _jitter_ often runs as much
> as 2 milliseconds. IMHO, this is too far off the mark of "same time,
> every time". Resistive loading does help the jitter situation to some
> extent, at the expense of physically large power dissipating resistors.
> For QAD, this may be acceptable to many. For aesthetics, the Rotary Rules.

Indeed the jitter is quite high, but, has anyone looked at the jitter of +
vs jitter of - going transitions?  I would expect a difference, but the
jitter on each "class" to be reasonably low.  And, of course, I suspect that
the performance of TSG triggering circuits will improve quickly as the
subtleties of design become apparent.

>
> Regards,
> --
> Jon G. Tebbs
> <jgtebbs-at-eos-dot-net>
>
>
>