Re: Extra coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Nele,
         I thought there might have been a smattering of theoretical 
musing in your post ;)

On 7 Feb 2002, at 21:58, Tesla list wrote:

> Original poster: "Nebojsa Kovacevic by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <morfeus-at-EUnet.yu>
> 
> Hello All!
> 
> Thank you all for the comments about the extra coil. I was
> considering that coil strictly from the theoretical point of view,
> don`t have any experiences with coils like that, only with
> 'regular' ones. But I would like to know from all of you who had
> the practical experiences with extra coils, what are the diferences,
> comparing the three system with two system coil? Is there any
> dieference, and is it really irrelevant? 

On building my first magnifier, I tried to make it work as Tesla had 
prescribed (the 1/8 wave, 1/4 wave thing) and was shocked to find it 
didn't work. A second attempt with different coils also failed. Then 
I simply put the scope and signal generator onto it and what I found 
matched none of the CSN theory that was supposed to describe it (and 
that was driving it from a *real* voltage source). I quickly 
discovered a single strong resonance (and a multitude of weak ones), 
tuned the primary to the strong resonance, and voila!

To this day I have not found any difference in output between a mag 
and 2-coil for the same primary drive conditions. Output=input-losses
still holds good in my experience.

     From all this, I concluded that the best thing about a magnifier 
is that it allows one to move the business end of the secondary 
system well away from the primary circuit which is a good thing. 

Regards,
Malcolm
<snip>