3 Element J-Pole Beam

[N6TZ]

:confused:
Some time ago I had seen an article about an ALL copper 3 element J-Pole Beam. The boom of the 3 elements was 1/2 copper tubing, as well as the rest of it. This is not the N3SDO design which uses a wood or fibreglass boom.

I do not know if changing the boom of the N3SDO design to copper would require changing the sizes of the director and reflector due to the change of boom material. Has anyone tried an all copper J-Pole beam with copper boom ?

Hal, N6TZ
N6TZ@arrl.net
:confused:

[WA7OET]

I do not know if changing the boom of the N3SDO design to copper would require changing the sizes of the director and reflector due to the change of boom material. Has anyone tried an all copper J-Pole beam with copper boom ?


Since there is no voltage at the center of these elements you could ground them to a copper boom. Maybe the other design didnt like the extra weight of the copper or wanted the higher gain of insulating them from the boom.

[AI3V]

Hello Hal,

My experience is that by the time you get above 2M in frequency, that everything about a antenna becomes critical.

I would not change any part of a antenna design unless you have a reliable reference antenna to compare the modified one to.

Rege