RE: GMHEICSLR....sort of

["sundog" <sundog-at-timeship-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Terry, Marc, all

  I am just using a voltage divider of 50 10mohm resistors, and an analog
MM.  I pull off the +DC of the caps to ground.  Gives me a nice ramp up to
~200v or so on the 7.5 kv tranny, and I cut out a string of 25 to use on the
4kv.  But firing it at 600v?  Even with my gap down to 1 (one, single)
millimeter, firstly the caps rapped off like mad, but I still got consistant
powerful sparks (white hot, thin but obviously powerful).  Since I can't tap
it (obviously!), I've been adding & subtracting caps till I got the most
powerful spark, then I began opening the main gap up till the caps got a
full charge (meter dropped -at- 190-200v instead of 80 or so.  The spark got
*much* hotter, and once I got the gap to a consistant firing every 2-3
seconds, I began opening the coil's output gap up.  I got to ~6" before it
began tracking.  Then right before I cut it off, it fired "one last time",
and the spark gap got *really* loud...before it was a little snapping
sound...I then saw the flash in the coil...Oops...  think I'll grab a variac
and tone down that 4kv tranny...run 1kv like Terry and see how his setup
cooks 'em, and expound from there...  Heh, I knew I grabbed a bag 'o those
1.2kv mylar caps for a reason!    C'mon everybody!  Let's de-throne Terry as
the King of the Ignition Coil!
And do be wary the sparks...mine just *sound* vicious...no way I'm gettin
into that!

									caio!
							          Sundog
-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, August 07, 2000 11:33 PM
To: tesla-at-pupman-dot-com
Subject: Re: GMHEICSLR....sort of


Original poster: Terry Fritz <twftesla-at-uswest-dot-net>

Hi Sundog and Marc,

I just thought of something that may help.  I had a high voltage probe and
meter so I could fairly carefully monitor the voltage.  Thus, I could go up
in little steps and set the gap just right.  Also, if the gap did not want
to fire, I knew "when to stop" and readjust it.  Also, dimming the lights
or having a dark background may help see the sparks.  However, they were
easily visible for me, but certainly not super bright...

Marc's 11 inch spark is sort of scary!  Almost too close for comfort!! :-)))

Cheers,

	Terry


At 10:40 PM 8/7/00 -0400, you wrote:
>terry, sundog
>this post makes me feel a little more confident about the results i had
>gotten. you see the one 11" spark that i did get was very thin and wispy
>(barely could see it), that's why i thought one of my hairs had got on
>the electrodes. all the 5" and 6" sparks where strong and bright. the
>long spark was only attained after i soldered up an mmc cap bank of
>1.6uf and made a better spark gap with needle points.
>i had to put that effort down for awhile it was driving me crazy, but
>i'll be back at it in the future.  good luck to those working on this
>and get a few coils, you'll need them.
>marc
>