"Bruce in Alaska" wrote in message
...
In article ,
"Dave Morschhauser" wrote:

All --

Please comment on the following:

What about using copper tubing as an RF ground connection? Since the
current flows on the surface, a tube seems to be the most space
efficient
way to get a large surface area. PI*R seems to say that a 1" copper
tube
would be as effective as a 3" or so copper foil.

Any thoughts?

Thanks,
Dave.

"Bruce in Alaska" wrote in message
...
In article ulztc.40$Y21.34@lakeread02,
"Jack Painter" wrote:

"Bruce in Alaska" wrote in message
"Jack Painter" wrote:

Major snippage



I don't know who taught you your math but 1" cooper tubing doesn't even
come close to the surface area per length of 3" copper foil. It isn't
the DC amps that you need to worry about it is the Impedance of the
connection between the RF Ground System and the Ground stud on the
Antenna Tuner. Lower impedance better Rf Ground. It is the Ground
that makes the Antenna work.

Pi*D is circumference, or Pi2R.

1" pipe exceeds the surface area of 3" strap. As totally impractical as
copper pipe would be as a bonding conductor in almost any application, it
would make an excellent RF ground connection on shore facilities where it
would offer several times the surface area of a solid ground rod half it's
diameter. Copper pipe is commonly filled with conductive salts which leech
through holes in the pipe to maintain high conductivity in ground rod
installations.

Best regards,

Jack Painter
Virginia Beach, Va