Re: Designing an optimized Magnifier
If you run a very large coilform the coeff. of coupling approaches 0.6 with
a single inline auto-transformer type coil. Use copper tubing on the lower
part and #4 or #6 AWG on the upper part. No flashover and insulation
You just increase the diameter (mathematically of course) until you get the
coeff. of coupling to 0.6 and then the flashover/insulation headaches go
away because the pri/sec coils evolve into a single autotransformer coil
with a driven tap for the high end of the oscillator. David Sloan used
this (Tesla's) idea in his investigations in 1940 prior to building the 150
kVA vacuum tube driven oscillator to develop 1 MEV for GE's resonance
transformer X-ray tubes.
Hope you can incorporate this information into your "ultimate magnifier
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Tuesday, August 03, 1999 4:26 PM
Subject: Re: Designing an optimized Magnifier
>Original Poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
>I have set up a small web page showing the optimum magnifier design,
>Essentially the same material that I posted, but with some extra
>comments and some pictures of simulated waveforms for several of the
>possible operating modes.
>Eventually I plan to build a device based on those design equations.
>I am not sure yet if there is some real advantage of the magnifier,
>even optimized, in relation to a properly designed conventional
>Tesla coil. The argument that for the same primary capacitor and top
>terminal sizes the magnifier allows higher voltage gain, because the
>self-capacitance of the third coil can be smaller, mostly fails when
>it is considered that the third coil must be long enough to sustain
>this voltage, and so must have a self-capacitance equivalent to the
>one of a secondary coil of a tesla coil. It is true that without the
>primary around, this capacitance may be somewhat smaller.
>Maybe the best argument in favor of the magnifier is that it allows
>quick energy transfer, without the compromise between tight transformer
>coupling and insulation of a two-coils system (modes 123, 125, etc.).
>And in this case, fast quenching may be really required.
>Antonio Carlos M. de Queiroz