Re: big coil history

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Paul Nicholson <paul@xxxxxxxxxxxxxxxxxxx>

Dr. Resonance wrote:

> The 1/4 lamda myth was strongly advocated and propagated
> by a number of Physics textbooks many of which referred
> to it as "the Ferrenti Effect"

The 'Ferranti effect'.  This refers to voltage rises on
power transmission lines occuring due to resonant effects
brought on by impedance mismatches and so on.  The light-
speed quarter-wavelength applies here, approximately,
because such lines are more or less straight rather than
coiled up, so the velocity factor is only a little less
than unity.   It was wrong to apply this quantitatively to
propagation along solenoids.

--
Paul Nicholson
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