"Jack Painter" wrote in message
news
3lvc.5786$Y21.4832@lakeread02...
C'mon ol' salt, you should know the inside of copper pipe is electrically
identical to both sides of copper strap when a bonding connection is made
to
either. Skin effect of electrical current is felt equally on both in
_that_
condition.
No it isn't. Consider a massive rod of 1". RF flows at the outside due to
skin effect. No remove the innards of the rod, leaving, say 1/16" of wall.
Why would current suddenly flow at the inner surface? It isn't, for the same
reason it was on the outside when the rod was massive.
Besides, heavy coils in radio stations are all tubes and cooled by running
water through them. Due to the skinn effect, the water is not 'touched' by
the RF.
Electromagnetic induction on a material from one outside
direction sees skin effect on the outside surface only of a closed
structure, cabinet, pipe, etc. But we are not talking about EMF's.
Yes we are. And EMF is exactly the reason why the electrons start to repell
eachother. And the only place where they are as far apart as possible is on
the outside of the tube.
Meindert