Art Unwin wrote:
On Dec 6, 2:38*am, Ian White GM3SEK wrote:
JP wrote:
Skin depth and what cause it:
http://en.wikipedia.org/wiki/Skin_depth
The Wikipedia treatment is not incorrect, but it may create a false
impression that the skin effect is limited to some particular type or
cross-section of conductor.
There is a more general derivation by Davidson that has far fewer
restrictions about the assumed geometry. There is a scanned copy
at:http://www.ifwtech.co.uk/g3sek/misc/skin.htm
Davidson shows much more clearly that the existence of a skin effect
does not depend on any particular shape or size of conductor, or any
particular type of electrical circuit. If RF current is flowing in a
conductor - regardless of the reason - then the skin effect will be
present.
That is a very powerful conclusion. Because we know the skin effect will
be present, it helps us to trace the RF current pathways on complex
shapes such as coaxial cables and shielded loops.
--
73 from Ian GM3SEK * * * * 'In Practice' columnist for RadCom
(RSGB)http://www.ifwtech.co.uk/g3sek
Thank you very much for the addition supplied. I never really
understood why hams could not accept this
From my point oif view the beauty of the Foulcalt or eddy current is
without this "pealing" on the chemical adhesion effect
that a particle has on a diamagnetic surface the ejected particle
would be without spin, and as such would not be able to have straight
line
projection within a gravitational field, a necessity for radiation.
Any book on wave guides will picture this eddy current on the inside
walls
and any book on non destructive testing will also corroberate its
presence
and yet it is still rejected by this group. When Maxwell inserted the
required units to achieve equilibrium per Newton it was the
mathematics that forcast
the presence of a levitation force that would not be identified for
several decades but stil ignored because of the dominance of wave
theory.
Cheers
Art
I only just read this reply.
NOTHING that I have said or referenced supports Art's ideas in any way.
His ideas are totally deluded.
--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek