Re: [TCML] Did anyone get this: Design for a classic mini-TC (fwd)

[Scott Bogard <teslas-intern@xxxxxxxxxxx>]

I got it.

Scott Bogard.

Chip Atkinson wrote:
> I know I got it and I know it made it to the archives but did anyone
> outside the mail server get this one?
>
> Chip
>
> ---------- Forwarded message ----------
> Date: Sun, 13 Apr 2008 17:15:44 -0700
> From: DC Cox 
> Reply-To: Tesla Coil Mailing List 
> To: Tesla@xxxxxxxxxx
> Subject: [TCML] Design for a classic mini-TC
>
> I have completed a "classic style" design for a nice mini-coil. It is
> portable, light-weight, uses only 3 Amps at 120 vac, and is ideal to
> transport to schools, Boy-scout meetings, etc., for demonstrations.
>
>  It uses a 6500 VAC, 20 mA nst that has been modified (some shunts removed)
> for operation at 50 mA intermittant duty.  Also, uses 12 pcs of 0.22 1600
> VDC MMCs in series (.0183 uF total), and a commercial high freq welder type
> sparkgap (2 gaps) that is blower cooled (500 cfm).  It can be constructed in
> a small 13.5 x 9.5" wooden box, antique looking, and I used a 3/8 inch thick
> granite tile (local flooring shop) cut to fit with 1/2 inch overlap all
> around (again, for the antique look.  Blower is fitted to one end with a
> vent on one sidewall and exits out base vent for airflow.
>
> I will be winding up a series of the secondary coils on my lathe.  We are
> using  a fine 36 AWG wire with winding length of 8.75 inch x 2 inch OD on a
> 9 inch long vertical tube. The sec resonants at 512.4 kHz using a 2 1/2 inch
> brass ball (McMaster-Carr or O.W. Langdergren).  I could probably get a
> discount on the 2 1/2 inch spheres if we all ordered them at the same time
> in a bulk order.  Spark output should be in the 5-6 inch range (may exceed
> this performance).  The complete design was done in JAVATC.  Uses a 5.6 turn
> primary of GTO silicone wire or it could be #6 AWG bare copper ground wire
> slightly spaced.  Coeff of coupling was set at 0.122 for good energy
> transfer and performance.
>
> If anyone is interested in purchasing some of these coils for their own
> mini-coil, I will be running a group of them in May.  I will furnish the
> complete schematic with the coil.  I also had to order the 75 pc minimum on
> the caps, so I will have extra caps available.  I can also furnish the high
> freq welder spark gaps.  You would mount them on some small insulators or
> fabricate simple plastic stand-off insulators.
>
> If there is enough interest I may offer a complete kit including coil,
> sphere, spark gaps, caps, and even the xmfr.  I get a price reduction on the
> xmfrs as I order them in bulk for my large Van de Graaff generators. All
> components new, not used.
>
> If John Feau is still occassionally doing some toroid and sphere spinning,
> perhaps he might be interested in doing a 2.5" copper sphere or perhaps a
> small .75 x 2.5 inch toroid for these babies.  The copper or brass look adds
> to the antique look of the finished unit.  I used some special antique sand
> blasted copper laminate on the exterior of my boxes.
>
> Please contact me off-list if you need the coil.  I will also be selling the
> completed coil with box, all parts installed, wired, and tested.
>
>
> Dr. Resonance
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>
>
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>
>
>   


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