JT's coil pictures - This is the RF chokes guy

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Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Jason,

............

You could probably benefit from a much larger toroid.  I am not sure 
they can be "too big"....  Bigger ones seem to work much better.

The alligator clips such as:

http://hot-streamer.com/temp/JT-Bowles/~IMG_3378.JPG

Probably can't handle 500 amp currents well at all!  You might try 
fuse clips or something the has more contact area.  That is probably 
not a big problem, but is sure does not help.  I can send you some 
clips if you need them.

The safety gap looks great!

It looks like you have a nice MMC.  Can you tell us the value of it, 
or it's caps, and how many, in uF or nF?  We really need to know the 
capacitance as a solid "number".

The coil sounds "odd" in the movie.  That might certainly be just 
because it is a converted AVI file movie and all that...  It seems to 
sound like it is not firing right and has a "woooh - woooh" sound to 
it.  But that might just be the movie and not the coil.

It "should" have bigger sparks...  Get a bigger toroid and definitely 
a solid direct ground!!  The AC line ground is worthless for a coil 
like this.  Just pound a few feet of any spare pipe into the wet soil.

I still wonder of one half of the NST might not be working well?  Do 
you know for sure if both sides are working ok?

There might be a tuning thing going on, but fix the other stuff first.

It looks very nice ;-))

Cheers,

        Terry


> 1st picture: safetygap with earthed middle
> 2nd: entire safety system, with two 7.4uH chokes, with Saf.G.
> 3rd: my proudly made variac box
> 4th: spark gap setup
> 5th: sparkgap in my coil, I USE ONLY 3-4 GAPS OUT OF 5. Sparkgap is 
> set at 7000volts +/- 1000
> 6th: my primary tap
> 7th: my primary/secondary arrangement and spacing
>
> 8th picture: showing my primary angle(45) & supports.   Primary is 
> 15.5 turns. only 13.5 are used
> 9th: ALL connections are made this way
> 10th: ends of my secondary(sec. is 1120 turns of 26 gauge, 3.5 dia, 
> 18 inches tall)
> 11th: my quench fan
> 12th; toroid connection
> 13th: my sweet secondary- with 30 coats of even varnish on it
> 14th: MY OVERALL COIL- WHAT A BEAUTY
>
> 15th picture: performance - long strikes are 15" to a grounded rod
> 16th: just a fun shot
> 17th: some nice arcing
> 18th: a very good video. Must see it.
>
> OH, I think i know why my coil sucks. I have a homemade toroid, that 
> breaks out too often, and i use the MAINS GROUND. Hahahahah mains 
> ground silly me. OH WELL, I WANT TO KEEP USING MAINS.
>
> Look over this vast amount of imaging and video ok??? Tell me what 
> you think of my monster.
>
> :P