[Elecraft] RF on pipes

[Nick-WA5BDU]

A hollow conductor is not analogous to a coaxial cable.  It has no 
center conductor.  In the case of the hollow conductor (copper pipe), 
current will flow on the outside surface only.  Skin effect still 
applies and works exactly as if the conductor were solid.

73-

Nick, WA5BDU

On 7/9/2011 4:51 PM, Jim Dunstan wrote:
> Yes, as in coax for an example.  when transmitting eg via coaxial cable which is properly installed the rf currents flow on the inside surface and not on the outside surface.  I mention proper installation .. In which case steps are taken to keep the inside and outside surfaces separate (at rf).  In your example,  plain copper pipe wil have a total surface of the inside + outside.  If you solder on caps then you will have just the outside.
>
> Jim
> VE3CI
>
> Sent from my iPod
>