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Initial New Coil Test
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From: Ed Phillips [SMTP:evp-at-pacbell-dot-net]
Sent: Monday, August 17, 1998 7:48 PM
To: Tesla List
Subject: Re: Initial New Coil Test
"
I had not properly attached the outer flex duct to the
center disc in all
areas. Just to keep the story short, during power on the
inner disc would
arc to the outer flex duct and the resonance originally
"detected" was way,
way off, as it effectively more than doubled the surface
area (and
capacitance?) of the toroid."
A metal plate for the top and bottom toroid mounts will
work just fine at providing good conductivity to the duct.
So will the method I use, which uses a couple of discs of
Masonite with aluminum tape on one side, so arranged that it
contacts the ducting all the way around, and also connects
to the top of the coil. Of course, only a single point of
contact is really needed.
EdTesla List wrote:
>
> ----------
> From: Chuck Curran [SMTP:ccurran-at-execpc-dot-com]
> Sent: Sunday, August 16, 1998 6:05 PM
> To: Tesla List
> Subject: Initial New Coil Test
>
> Hello All:
>
> This weekend I was able to set up my newest coil and actually put power to
> it. The mechanical side of moving it into position and going from the
> horizontal to vertical proved to work out quite well, even with the 240-270
> pounds. My first technique of lifting the 78" toroid up to the top which is
> around 12 feet up, turned out to need a methods change. That worked out and
> 15 minutes later I was able to resonate the secondary and go for the primary
> tune point. The system resonated higher than I expected and this turned out
> to be a clue for a pending problem.
>
> I had not properly attached the outer flex duct to the center disc in all
> areas. Just to keep the story short, during power on the inner disc would
> arc to the outer flex duct and the resonance originally "detected" was way,
> way off, as it effectively more than doubled the surface area (and
> capacitance?) of the toroid. The results were 7-8 foot sparks at a similar
> Kw input level, very weak and wimpy looking relative to my smaller coils
> performance from last year. The good news was that it became very clear
> immediately what had been done wrong, so now that the toroid has been
> repaired and is electrically "a one piece assembly", it's time to retune and
> try again. The low power testing went well for the new power cabinet and I
> am at least pleased with the success of that part of the project.
>
> I stood the coil up in the middle of the driveway on Saturday around noon
> hour. All Saturday afternoon and evening as the occasional car went slowly
> by, there must have been a number of interesting guesses as to what that big
> round thing was. As always, Saturday night some of the neighbors came out
> and are asking for video tapes of it! I think I'll give these away in order
> to keep things on good terms with all! I'm close to having a web page
> finished and I'll have some of the photo's of this coil on it. I'll give
> out the URL when it's up and functional, in about 2 weeks.
>
> Chuck Curran
> Cedarburg, WI