Re: 3 phase TC (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 3 Jun 2007 09:07:17 -0700 (PDT)
From: J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 3 phase TC (fwd)

360 / 3 = 120, not 60 :-))  Never heard of 120V
three-phase either, unless you speak of 208Y where you
have 120V between each hot and neutral.  In that case,
connecting two hots yields 120 * sqrt(3) = 208V.

Still, producing a "triplet" or "tri-mode" system this
way seems possible.  I'd hesitate to call it a
"three-phase coil", since it's really three coils
operating out of phase.  Since the angle of separation
would be less than for a twin system, and since you'd
be powering three coils instead of two, it seems like
it'd be a lot harder to get long sparks.  Still, it
would definitely be interesting!

Perhaps there is some way to produce an actual
"three-phase coil" (AC), though, using a special gap
or multiple gaps and maybe multiple primaries.  I
think this has been discussed here before.  It's hard
for me to see where such a system would have any
advantage over a single-phase system run at a higher
breakrate, though.

If there is such a thing as a "common" use for
three-phase power in the TC community, it is for DC
coiling.  The coil named "Electrum" is/was, I believe,
a DC coil fed with three pole pigs rectified.

Regards,
Aaron, N7OE


--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: List moderator <mod1@xxxxxxxxxx>
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Sun, 03 Jun 2007 01:21:25 -0400
> From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: 3 phase TC
> 
> Hey everybody,
>      A while back somebody asked about a 3 phase
> Jacobs ladder, what about a 
> 3 phase TC?  I don't know much about 3 phase power,
> but as I understand it, 
> connecting 2 hots on a 120 volt 3-phase line
> produces about 100 volts as 
> they are 60 degrees out of phase, and connecting all
> three give 0 volts as 
> they cancel each other.  Would it be possible to
> have 3 identical systems 
> running of a single three phase piggie, to get 3 TCs
> each 60 degrees out of 
> phase.  My thinking is that a twin coil is like a
> center tapped NST, 180 
> degrees out of phase, and a triple would be like
> 3-phase tranny, with all 
> the RF grounds coming together and happily canceling
> each other out.  I 
> obviously don't have the time or funds to make such
> a device, I am simply 
> curious as to whether it would be theoretically
> possible (or if somebody's 
> done it already).  Thanks.
> Scott Bogard.
> 
>
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