RE: Tesla magnifiers (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 16 Sep 2007 00:39:16 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: RE: Tesla magnifiers (fwd)


Jay,
     I'll let the experts get down and dirty with details, but every coil
plays a role in frequency (all three).  You can build a magnifier, and
tune it with any reasonably sized coils.  A magnifier is basically an
autotransformer, the first two coils act like a conventional TC, producing
high voltage, the third coil, through auto-transformer action steps this
voltage up higher, but it also greatly changes the systems resonant
frequency (I would imagine it lowers it, but I am not entirely sure).  
Think of it like a variac that is set to put out 140 volts, the third coil
is like the windings beyond the 120V input winding, except it is a
resonant transformer, not a conventional one.  You can swap a different
coil in for the "resonator" and still get decent sparks, if you re-tap the
primary, and if it is not beyond the tuning range of the device.  I had
the privilege of watching a pretty sweet (big) magnifier run once, they
are seriously cool.  There are a lot of fine points to building a
magnifier, that make it much superior to a conventional, over coupled,
really tall secondary toting conventional TC.  I hope this helps, good
luck with your paper (I have one due soon as well, but it is about farming
and oil, kind of boring). Scott Bogard.

> Date: Sat, 15 Sep 2007 20:01:02 -0600
> From: tesla@xxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Tesla magnifiers (fwd)
> 
> 
> ---------- Forwarded message ----------
> Date: Sat, 15 Sep 2007 21:33:29 +0000
> From: jhowson4@xxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Tesla magnifiers
> 
> Hello all I am researching about the tesla magnifier for an AP physics
> paper at school and I read a bunch of sites about how it works and I am
> still really confused.  basically I think I understand that the primary
> should be of a low inductance and should have a high coupling with the
> secondary which should be of a slightly larger inductance, and that the
> point of that is to generate a high voltage through normal transformer
> action no resonance.  This is where I am lost how is the resonant
> frequency of the 3rd coil found.  Is it a sum of the secondary inductance
> and the 3rd coil inductance with the capacitance of the top-load.  Or is
> it just the 3rd coil and its top-load giving the resonant frequency.  and
> how is this frequency produced.  Is the driver circuit frequency the same
> as the resonant frequency of the 3rd coil and it is just having the
> voltage increased by the secondary which is feeding the 3rd coil or what
> As you can see I am baffled by this and my paper is due Tuesday (at least
> it is not Monday) my paper is about tesla and how he did some of the
> things that he did and i am trying to describe how his magnifiers work and
> some of his other inventions like the induction motor and the normal tesla
> coil etc.
> 
> 
> many thanks jay
> 
> 

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