Magnifyer Coil Question

From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent:  Friday, June 12, 1998 12:43 AM
To:  Tesla List
Subject:  Re: Magnifyer Coil Question

Hi Adam,

> From:  Adam Parker [SMTP:park_e_r-at-hiwaay-dot-net]
> Sent:  Thursday, June 11, 1998 1:18 PM
> To:  Tesla List
> Subject:  Magnifyer Coil Question
> I'm interested in building a coil with a magnifyer type tank design.
> Will I need a rotary gap to achieve this well?
> I haven't been able to find much info on the 'third coil'
> on the magnifyer circuit, what purpose does it serve exactly and
> just how is it physically positioned?
> BTW: Did tesla use a magnifyer type coil during his experiments with
> wireless power? (That would be neat novelty application for my coil.)
> Thanks in advance for any feedback.
>      Adam

Depends on the power level in my experience. I've had the same good 
success at low power with a magnifier (a few posts ago) as I've had 
with two coil systems using a single static gap. Higher powers would 
demand a rotary.