In article Wmnvc.6104$Y21.5577@lakeread02,
"Jack Painter" wrote:

Meindert, water is not a good conductor, with average tap water having
100,000 ohms resistance across 1 meter of 15mm plastic pipe filled with
water. Even at RF frequencies, where skin effect is most pronounced, a
bonded connection made equally to both inside and outside of a copper pipe
should exhibit skin effect throughout most of the entire cross section of
the copper pipe. This is because the wall thickness of the copper pipe is
not materially different from copper strap.

Example:

For copper tubing used as a inductor in antenna tuners:

coil length
R= ---------------------------------------
conductivity *skindepth*2pi*coil radius

Now, applying voltage to the outer surface only of copper tubing with closed
ends, whether by EMF attachment or bonded connection to the outside only,
would exhibit surface-only skin effect similar to if a faraday cage was
constructed of the same copper strap we are talking about. The outside
surface would carry most current. But if the voltage connection was bonded
to both inside and outside of an opening of the faraday box or the copper
tubing, then current via skin effect would be nearly constant on the inside
and outside surfaces of the box, defeating the faraday effect. The
condition I originally described, that of a bonded connection, applies
voltage equally and carries current equally on the entire skin of the
conductor, inside and out, 360 degrees, as efficiently as a piece of copper
strap of similar cross section.

Best regards,

Jack Painter
Virginia Beach, Va

Jeeezzz Louise Jack, where did you learn all this BS that your spreading.

But if the voltage connection was bonded
to both inside and outside of an opening of the faraday box or the copper
tubing, then current via skin effect would be nearly constant on the inside
and outside surfaces of the box, defeating the faraday effect.

Please explain how one "BONDS" a connection to only the inside of a
copper pipe. All of the Physic Professors of the World would really
like to know. Are you saying that if one made a "RF Connection",
to only the inside of a copper tube, that no RF would flow on the
outside of the tube? That is just plain wrong, and a stupid statement
on it's face.

ok, enough of this BS, CFR!!! (Call for Reference) Let's see if old
Jack can actually come up with some documentation that RF flows on the
inside of a connected copper tube or pipe. Lets go for some Peer
Reviewed Documentation here, the straight, No ****, Textbook, kind
of documentation, written by some really Qualified Physics Phd's.

Hmmmm, all the PhdEE's that I asked, just laughed and ask how the
weather and fishing was.........

Bruce in alaska
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add a 2 before @