Re: GMHEICSLR....sort of

[Terry Fritz <twftesla-at-uswest-dot-net>]

Hi Sundog,

	I was just dusting off the Fabulous GMHEICSLR cup tonight!  Every time I
see GMHEICSLR in a subject line, a cold shiver goes down my spine!  Oh oh,
will this be... :-))

Submersing the thing in oil will stop the tracking problem.  Be sure to
keep it in a cantainer since the oil will "jerk" under the stress and
something my let loose...

It is important to get the thing tuned at lower power.  I think if the
tuning is off, the primary cap vents its furry into the coil without
anything coming out.  Thus blowing it's guts out.  I would get the thing
going at maybe 600 volts first and play with the tuning, arc points,
polarity and get everything just right and peaked.  Then carefully turn up
the voltage bit by bit.  The coil is at the edge of destruction so you have
to be sure it is right before "going for it!"  then you should be able to
get to 13.24999 inches! :-))  You want the power to go through the coil,
not into it.

The long sparks are kind of thin but snappy.  If they are bright and
powerful, that may mean the tuning is off.  Be sure to try both polarities
too.  I also had mine on a concrete floor which may have provided a nice
ground plane.  Perhaps being on a table whould have an effect?

I know Marc and Sam were working on this too but the prise still eludes
them :-))

http://www.powerlabs-dot-org/gmheicslr.htm

Be sure not to get shocked by it.  The 10kHz high voltage RF will send you
through the roof!!  Since mine was so dependeant on polarity, perhaps there
is a lot of net DC too?  

Cheers,

	Terry


At 10:02 PM 8/7/00 -0400, you wrote:
>Hi All!
>
>
>     Nope, haven't broken Terry's record yet.  What I can say for
>it...Man..this is tough!  My scanner is fried (back on it's way to
>the manufacturer), so please be patient with me.  But as one
>project has to hold, others progress.
>
>  So far my observations...
>    Using a 4kv NST to charge a bank of caps works fine..I
>re-connected my diode banks to do half wave rectification on a
>7.5kv nst, and reconfigured the caps.  I got maybe half a dozen
>good hot 6" discharges from it before the coil died in a orange-ish
>flash of light.  It arced internally, and despite being in the
>middle of the coil, you can see the flash of shorted turns through
>the expoy the factory uses..Yipes...
>  These were dry runs (not submerged in HV oil), just so I could
>get an idea what the coil will take.  Next run I'm back down to 4kv
>and loading up on capacitance.  Also going to submerge the thing.
>But, I have to admit, my #1 problem with it is insulating the HV
>button from the rest of the coil...I kept getting consistant sparks
>through my epoxy, silicon, and lexan from the button to the inside
>of the core....It seemed to ignore the wires and just want to
>track.  Hmm...Hopefully an oil bath will help it.   This is a pain
>of a project...I'm findin' out really quick it takes a bit more
>finesse than brawn.  But I got time...and funds..(somewhat)...The
>late-night sparks will continue as soon as I grab another coil or
>two....Thank goodness there's a discount Auto just around the
>corner.... :)
>
>
>Caio all!
>                                                            Sundog
>
>