Re: More topload troubles

To: tesla-at-pupman-dot-com
Subject: Re: More topload troubles
From: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Mon, 28 Feb 2000 17:43:51 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi Jason,
                  Unless I've misread this the clue to your problems is in 
the "18 bottles".  If you are trying to use a much larger primary cap 
with the same primary coil tappings and same secondary, your coil 
is completely out of tune. Less primary turns should = better results 
but I also suspect that a 16" long coil is going to be a problem at 
much higher primary energy levels. You may need to loosen 
coupling considerably as well. However, try cutting out a few 
primary turns first. 

Best of luck,
Malcolm

> Original Poster: "Raycroft" <k.raycroft-at-worldnet.att-dot-net> 
> 
> Finally, the garage is dry!
> 
> After about 2 months of standing water in the garage, it finally dried
> out and I was able to run my coil again.  Originally, it was a 15/30
> with 6 beer bottles, 4"X16" #24 secondary with 3"X12" (center to center)
> toroid.  With this and a single spark gap i could get 18+inches, and it
> was in tune for about one whole turn of the primary.
> 
> Enter new transformers, fans, and beer bottles, and cables.  All else
> the same, I am now using a 12/60 transformer, with the possibility of
> adding another, 18 beer bottles, and the same gap, only with a fan
> across it, and the wires in the tank now have better connections. 
> Before, i had bolts sticking thru the base, then a washer, wrapped the
> end of some GTO around the bolt, another washer and then a nut.  Now,
> the ends of the wires are terminated in a flattened section of copper
> pipe (1"x1") with a hole drilled in it to put the bolt thru.  
> 
> Results:    ARRRGGGGHHHHHHHH!  With topload, there is a section of the
> primary about three inches wide where I can tap and pull an arc 3" long
> to ground.  Yes, i did say three whole inches.  No sparks to air.  With
> no topload, there was a six inch section of the primary where I could
> get it to pseudo tune, and get 6 " arcs to ground, 3" to air.  Does
> anyone have any ideas on this?  I just don't know!  A tried every
> quarter inch of about a turn on each side of where I could pull some
> arcs, but nothing!  with the 12/60 I would have expected at least an
> extra inch, but instead I lost a foot!  If you can't come up with
> anything, Ill try again tomorrow.
> 
> Thanks,
> 
> Jason
> 
>