Re: Gemini Tesla Magnifier

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jason Johnson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>

Very cool! I've had the same bipolar magnifier idea kicking around in my
head for quite a while, but haven't got a round to it yet as you have.
You said draw was between 15 and 20 amps. Was this on a 120 or 240 volt
line? I like the sound of your ballast I haven't seen that idea anywhere
else yet. What was the other dimensions of your toroids? Also what is
the diameter of the barrel you have your primary wound on?

<< Jason R. Johnson >>
G-3 #1129
The Geek Group
http://www.thegeekgroup-dot-org/

"The two most common elements in the universe are hydrogen and
stupidity."
 -Albert Einstein

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, July 22, 2002 11:12 PM
Subject: Gemini Tesla Magnifier


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Teslamagnifier-at-aol-dot-com>
>
> Fellow Voltophiles,
> Thanks for all the information you have posted at pupman and all the
> superlative  and informative websites.  Having spent innumerable hours
reading
> and printing them, I've learned a great deal and, after a long hiatus,
have
> finally gotten back in touch with my inner nerd!
>
>       Late last year during a boring day at work, an idea popped into
my head
> which has taken a while to execute.  A basic magnifier coil had to be
built
> first and then elaborated on.  Tonight all the parts finally came
together, and
> it worked!  So there weas first light on a design which I haven't seen
> described in all that I've read so far.
>
>       The design:
>
> -120 VAC--} 14400 potential transformer (PT)
> -Current limiting with an isolation transformer (IT)in series with the
PT, and
> a variac shorting the secondary of the IT.
> The MasterBlaster spark gap ( I think it is listed under "blaster" in
the
> picture archives)
> -Two Maxwell (via Ebay) .03 mfd capacitors in series (.015mfd)
> -a primary coil of 50" 1/4" refrig tubing wrapped around a 15 gallon
drum.
> -inside and coaxial to the drum is an 8" PVC pipe with around 180
turns of
> domestic 14 ga insulated wire.
> -Each end of this secondary coil leads to an "extra-teriary-magnifying
coil."
> Therefore there are TWO tertiary coils.
> -The tertiary coils are 6" thin PVC with around 700 turns of 20 ga
wire.  Each
> is capped with a 4" dryer duct toroid.
> --Blower switch turns on relay which activates blower.  This relay
enables a HV
> relay which sends current to a variac.  Output of variac goes to IT
and then to
> PT (and back to Variac)
>       Forgive the approximate statistics for now.  Impulsiveness had
its way
> with me, (as usual with ADD) and I wanted to rig it all up and see
what
> happened.  When my abused digital camera gets back from Olypus, will
post some
> pictures and by then have more precise measurements.
>       Some observations:
> -- Best sparks with the primary tapped at the full 50 feet --around
13-14 turns
> around a 12+  inch diameter.
> --Secondary inside of the primary so it is well coupled.
> --Each tertiary+toroid had an isolated resonant freq of around 173 KC
> --The naked secondary had a resonant frequency of around 490 KC
> --Placing an additional 6" toroid on top of one of the tertiaries
seemed to
> inhibit break out.
> --Current draw somewhat erratic between 15 and 20 amps.  ( I dont
mind--makes
> things seem even more out of control!!!!!!!!!)
> --Both tertiaries broke out nice streamers with white arcs between the
> two--around 5 feet.
>       I wanted to be conservative with those Maxwell caps, so put two
in series
> to keep the stress down.  They add up to .015 mfd.  Tomarrow will
eliminate one
> to get .03 mfd, and play with the tuning.  I imagine that the
> tertiary----secondary---tertiary  coils coupled together might have a
rather
> low resonant frequency.  The .03 mfd in the primary might resonate
closer to
> their frequency.  Also have a .02 to try.
>       Tonight I didn't want to take all the test equipment (signal
> generator--freq counter--oscilloscope) outside to measure things.
Perhaps
> tomorrow will measure things and quit shooting sparks in the dark.
>       I'd like to hear any comments or observations.  Better Email
address for
> me is
> winchandle-at-aol-dot-com
>
> Thanks for the information and inspiration.
> Bill Shepard
>