Re: Pri/Sec coiling

To: tesla-at-pupman-dot-com
Subject: Re: Pri/Sec coiling
From: Rodney Graham Davies <Rodney.Davies-at-anu.edu.au>
Date: Wed, 5 Feb 1997 23:30:27 +1100 (EST)
Subscriber: Rodney.Davies-at-anu.edu.au Fri Feb 7 00:04:19 1997

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