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

[Bert Hickman]

Hi Chip,

I did indeed see this post from Dr. R.

However (as with a couple of of my earlier postings) I still don't seem 
to be receiving copies of postings that I make. This just happened again 
- I never saw a copy of my posting to Vladi yesterday. However, the 
message shows up in the archive and Vladi clearly received it. When 
messages are forwarded from the Pupman mail server, is it possible that 
the originator's email address is being suppressed?

Bert

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 <resonance at wildblue.net>
> Reply-To: Tesla Coil Mailing List <tesla at pupman.com>
> To: Tesla at pupman.com
> 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