On Sat, 03 Jan 2009 08:31:30 -0600, Cecil Moore
wrote:

Has anyone ever measured a difference between aluminum
tubing and a solid aluminum rod at the end of an antenna?

Maybe Horace Lamb or Oliver Heaviside? Skin effect is dependent on
frequency as well as the material, right? Is the thickness of the
aluminum tubing significant at the frequency where you plan to use it?

I missed the beginning of the thread, so what is the original question
pertaining to?

In any case, I believe the rod would be heavier. ; )

S.T.W.

Cecil Moore wrote:
"Has anyone ever measured a difference between aluminum tubing and a
solid rod at the end of an antenna?"

Unnecessary as the inside diameter of the tubing would have to be at
least 1/2-wavelength to admit significant RF energy.

Best regards, Richard Harrison, KB5WZI

Richard Harrison wrote:
Cecil Moore wrote:
"Has anyone ever measured a difference between aluminum tubing and a
solid rod at the end of an antenna?"

Unnecessary as the inside diameter of the tubing would have to be at
least 1/2-wavelength to admit significant RF energy.

Richard, it was a rhetorical question.
--
73, Cecil http://www.w5dxp.com