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Re: Over Quenching?
Hey, J.B., All,
I dunno if you're *overquenching* it. My guess is with the
bigger cap you're taking longer to charge it, because you've
increased the capacitance and kept the charging current the same.
Cap takes longer to charge, means longer wait for the voltage to
build up to the firing point, means the gap resistance goes up (due
to the cap taking longer to charge), so a bigger bang. The sparks
and gap would sound raggedy because of the delay. Maybe try
closing up the gap a little bit, or an srsg? How much gap are you
running now?
Just my $.02 :)
Sundog
-----Original Message-----
From: Tesla list <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Tuesday, July 25, 2000 11:30 PM
Subject: Over Quenching?
>Original poster: "J. B. Weazle McCreath" <weazle-at-hurontel.on.ca>
>
>
>Hello Coilers;
>
>I've been playing around with various cap values/primary turns
>on my coil which is powered by a 6 KV, 500 mA. radar tranny.
>The changes require re-tuning after each change as expected,
>but I've also noted that the sound of both the RQ gap and
>the streamers off the topload sound more ragged and have a
>lower tone when I use the larger cap, fewer turns setup.
>
>The first configuration is .0033 uF. and about 11.5 turns
>while the second configuration is .016 uF. and around
>6.5 turns on the primary.
>
>Is it possible that I may be over quenching the RQ gap when I
>have the larger value cap in use? I'm using an old Filter
>Queen motor/compressor to draw air thru the gaps between the
>pipe sections, with it running full tilt. I'm going to try
>to borrow a smaller variac so that I can thottle down the
>the air flow, but I'd be interested in hearing any comments
>you fellows can offer in the meantime.
>
>
>73, Weazle, VE3EAR/VE3WZL
>
>Listening: 147.030+ and 442.075+
>E-mail: weazle-at-hurontel.on.ca
> or ve3ear-at-rac.ca
>Web site: www.hurontel.on.ca/~weazle
>
>
>
>