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Re: Pri/Sec coiling
Tesla List wrote:
>
> Subscriber: Rodney.Davies-at-anu.edu.au Fri Feb 7 00:04:19 1997
> Date: Wed, 5 Feb 1997 23:30:27 +1100 (EST)
> From: Rodney Graham Davies <Rodney.Davies-at-anu.edu.au>
> To: tesla-at-pupman-dot-com
> Subject: Re: Pri/Sec coiling
>
> On Tue, 4 Feb 1997, Tesla List wrote:
>
> Hi Robert,
>
> > rwstephens: The wind direction on Tesla coils is very definitely critical when
> > building a tandem coil system with a separate secondary in each of the two
> > primaries, or the same primary with two secondaries suspended within it.
> > In this case, given that the primaries are wound the same direction, or you use a
> > single shared primary, then the secondaries will have to be wound
> > opposite sense from each other to get a 180 degree phase difference
> > between the top terminals. If you do not do this the two coils will
> > not speak to each other with hot streamers.
>
> Hmmm, I was wondering as to how the two coils arced to each other. I
> figured such that to make them arc, they have to be effectively
> either partially (at least 90 degrees) or completely out of phase (180) as to
> setup a large enough potential difference, else, I guess it might make a
> display kind of interesting if two coils were attempting to arc to each
> other and were in phase! Hmmm...has anyone done this?
>
> > As mentioned by the others, in a classical two coil, or magnifier,
> > the sense of the coils matters not.
>
> Ah! <Click...bzzz, brain kicks in...> I thought I had a problem there,
> however, both the secondary and primary on my coil are wound in the same
> direction..
>
> Thanks Robert, much appreciated!
>
> Cheers!
>
> Rod
Is the coil winding something you guys take for granted? I mean, I am
getting ready to build my first, and that thought came accross my mind
many times, I saw pictures apon pictures of coiling, and they went the
same direction, so I didn't give it any more thought. But I guess we all
have it clear, they SHOULD wind in the same direction right?
So the whole deal with magnifier coils is that they are directly
(inversely) out of phase, so each primary oscillation would cause both
secondaries to release at separate identical times? (Newbee alert ;).
If anyone here has ever built a tesla coil running off one 12Kv 30ma
neon, let me know, this will be my first. And possibly make another with
two 15kv neons ;) if the first is successfull, and I take it I will
learn a GREAT deal of information upon the completion of the first?
Isn't that what practice is?
Also, let me know if these prices are cheap for used neons.
12KV 30ma - 20$ (Franceformer)
15KV 30ma - 25$ " "
9KV 60ma - 20$ " "
If they are good, I will order me up allot.
Also, I need to know if it is definatly a must to remove the transformer
from the tar and metal caseing, and why people do it? I have heard
people saying they boiled theirs in desel to get the tar off, and at
what cost?
Thanks people! Also (Man I am loaded today!!) if anyone has any "safety"
notes for neon transformers let me know, things like, power is left in
the neon after being unplugged, but not discharged, use a light build in
the series of the power in to prevent the neon from being over worked.
Etc!
Thanks again!
Jeremy Bair