Moskog wrote:
I just made a 2m jpole antenna out of 1/2" copper pipes, like this one:

http://www.qsl.net/wrav/2mjpole.htm

On this web site the center conductor of the coax is connected to the
longest pipe and the shield to the shortest.

Now looking at other sites I find the center conductor connected the the
shortest pipe.

So what is the correct way to connect the coax?

Theoretically, it doesn't matter. The bottom 1/4WL of a J-Pole is
simply 1/4 wavelength of a balanced feedline similar to the original
Zepp antenna. I would install a choke on the feedline, however, to
try to keep the feedline from being part of the antenna.

As a point of interest, what is the feedpoint impedance of a 2m
J-Pole if the short is removed at the bottom and the antenna is
fed at that point, aka the original Zepp antenna? Is that like
the Arrow Antenna's J-Pole design?
--
73, Cecil, http://www.qsl.net/s5dxp