Re: Magnifier system

To: tesla-at-pupman-dot-com
Subject: Re: Magnifier system
From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
Date: Wed, 20 Nov 1996 10:29:29 +1200

Bert,
       I think the point you make about this explains something i've 
been wondering about quite well.......

<lottsa snip>
> The Corums' open-circuit helical resonator model probably comes closest
> to modelling actual behavior. An unloaded helical resonator behaves very
> much like an open-circuit high-impedance transmission line driven at its
> 1/4 wave frequency. The amplitude of the voltage as we progress up the
> coil should increase approximately as the sine of the phase distance
> from the bottom, rising to a maximum at the top (90 degrees). Fully 50%
> of the output voltage is reached only 1/3 of the way up the coil! This
> certainly agrees with your statement that the maximum volts/turn
> gradient is at the base of the resonator. Similarly, the current
> amplitude should vary approximately as the cosine, with the maximum at
> the bottom, decreasing to 0 at the very top. However, fully 50% of the
> coil base current would still be present 2/3 of the way up the coil.
<oodles more snip>

It _is_ a distributed resonator (being << 1 wavelength long) and what 
you suggest makes sense of that! Would I be correct in thinking that 
the V.I product (phase angles accounted for) at any point is the same 
for any other point? If so, the observation about 0.5I being present 
2/3 of the way up makes sense and also supports Greg's view that the 
M in the structure doesn't really count! So much for my turn-turn 
induction idea :(

Malcolm