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Re: Confessions of an EE

Subject: 
        Re: Confessions of an EE
  Date: 
        Thu, 20 Mar 1997 22:40:04 -0700
  From: 
        "DR.RESONANCE" <DR.RESONANCE-at-next-wave-dot-net>
    To: 
        "Tesla List" <tesla-at-pupman-dot-com>


to: Skip Greiner

Noted your post on an excellent design for a medium size coil with great
performance
with little input power.

We use a very similar design in one of our units.  Sec. is 18" dia. x
36"
long.  Pri cap is
.05 MFD on a 3 3/4 turn pri.   Sec. elevated 2.25" above primary.  
Inner
primary winding
exactly 2" from coilform.    Top HV electrode 7" x 30" toroid.

Rotary non-snychro sparkgap  10 electrodes x 1725 RPM  (4 total gaps).  
Driving with a pole
xmfr and series current limiting inductor at 6 KW produces a continuous
84"
long spark.

If you increase only your drive current with your design you should see
some dramatic improve-
ments.

DR.RESONANCE-at-next-wave-dot-net


----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-poodle.pupman-dot-com
> Subject: Re: Confessions of an EE
> Date: Thursday,March 20,1997 10:36 PM
> 
> Subject: 
>             Re: Confessions of an EE
>        Date: 
>             Thu, 20 Mar 1997 17:41:45 -0800
>        From: 
>             Skip Greiner <sgreiner-at-wwnet-dot-com>
> Organization: 
>             Greiner, Ltd.
>          To: 
>             Tesla List <tesla-at-pupman-dot-com>
>  References: 
>             1
> 
> 
> Tesla List wrote:
> > 
> > ubject:
> >         Re: Confessions of an EE
> >   Date:
> >         Mon, 17 Mar 1997 20:37:10 -0800 (PST)
> >   From:
> >         "Edward V. Phillips" <ed-at-alumni.caltech.edu>
> >     To:
> >         tesla-at-pupman-dot-com
> > 
> > Skip:
> > "I put together what appeared to be a pretty impressive 700w TC,
> > something like 48"(+) discharges and thought the design was worth while
> > to push to 2kw. "
> >         Sounds pretty bloody impressive to me.  Details?
> > Ed
> 
> 
> Ed:
> Here are the latest specs
> 
> Sec: 17.5" x 24" (D x H), 192 turns #14 ga machine tool wire
> 
> Pri: 23" dia. solenoid wound. 6 turns .375" copper tubing spaced .25"
> 
> Cap: .014uf
> 
> Toroid: 5.5" X 28"
> 
> Input: 12kv -at- 60ma
> 
> Gap: sync rotary, 1800rpm, 4 gaps, 1 closure per each 1/2 cycle
> 
> Sec Fr with no toroid: 350khz
> 
> sec Fr with toroid: 260khz.
> 
> k: .21 with sec mounted 3" above top turn of primary 
> 
> Due to the shortness of the secondary, no strike rail is required.The
> cap and tranny are in very close proximity to the primary and they do
> not take any hits from the toroid either. They are nearly at the same
> level as the primary.
> 
> I'll report more as I increase the power to the 2kw level.
> 
> Skip