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Re: Coil at Frys
To Steve, All
No, the coil at Fry's *is not* the "other half" of the Griffith
Park Observatory. It is all new construction. The coilform
itself, is cast from fiberglass, with a wooden top and bottom
plate. It measures 48" tall, by 36" diameter at the base, by
18" in diameter, at the top. It is wound with PVC insulated
#14 AWG stranded wire, close space wound, and covered with
a number of coats of red glypt inuslation varnish. As installed,
it is only running at about 1/3 of full power. The arc distance
(straight line,) from either corona tip, to the side walls of the
gazebo, is 72 inches.
Best regards,
Bill Wysock.
> Date: Thu, 13 May 1999 06:42:10 -0600
> To: tesla-at-pupman-dot-com
> Subject: Re: Coil at Frys
> From: Tesla List <tesla-at-pupman-dot-com>
> Original Poster: "Steve Young" <youngs-at-konnections-dot-com>
>
> Hummm, sure sounds like it may be the other half of the TC at the Griffith
> Observatory in Los Angeles!? I understand originally it was a bipolar
> design.
>
> --Steve
>
> ----------
> > From: Tesla List <tesla-at-pupman-dot-com>
> > To: tesla-at-pupman-dot-com
> > Subject: Coil at Frys
> > Date: Tuesday, May 11, 1999 8:54 AM
> >
> > Original Poster: "LWRobertson" <LWRobertson-at-email.msn-dot-com>
> >
> > Hi ...
> >
> > For those in the SF Bay area there is a very nicely built
> > coil at Frys Electronics new store at 680 and Automall
> > Pky ( formerly Durham Rd. ) in Fremont. Entrance off of
> > Osgoode. If you talk to a salesman they'll get someone
> > to turn it on for you.
> >
> > I guess it was built to emphasize historical accuracy over
> > raw performance .
> >
> > The secondary is conical, about 3 feet in diameter at the
> > bottom, and a foot or so at the top, wound with around
> > 300 turns of quite heavy space wound wire. A foot above
> > the top is a copper sphere also about a foot in diameter
> > with two discharge points arranged diametrically opposite
> > each other.
> >
> > Primary is 2 inch or so copper strip, nicely polished, as is
> > the capacitor - gap - coil connections. Seems to be tapped
> > around turn four.
> >
> > The gap is a really pretty rotary driven by a cogged belt
> > from a motor hidden underneath.
> >
> > It's in a Faraday cage made from heavy chain link and built
> > into a gazebo.
> >
> > Makes fairly strong connected arcs to the chain link probably
> > 4 feet away, easily visible in the well lit store. The inside of
> > the gazebo is black, which helps.
> >
> > When a keyswitch is turned it starts up a little while later
> > for a few seconds (10 or 15 or so).The guy who had the
> > key didn't know who made it, but the workmanship is superb.
> > Someone put a lot of time on this one.
> >
> > LR
> >
> >
> >
> >
>
>
>
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