KB8QEU's
Super J-Pole Antenna
(Collinear Design)

Below is a Javascript, the one of two places, for calculating the lengths of copper pipe to be used for the construction of a Super J-Pole. The antenna I constructed was made of 3/4" copper pipe.


Frequency 
Top Section (A) " From tip yo top of Matching loop.
Bottom Section (B) " From Bottom of the matching loop
to top of the copper crossover.
Matching section (C) " From top of copper crossover to tip.
Matching loop section (D) " From top of copper crossover to tip.
Full length " From top to copper crossover.

Bend the loop in a 6" Radi arround the antenna.
(Showen below left)
Solder the wires to the copper pipe at pre-drilled 1/8" holes.
(Showen below Right)

kb8qeu 20070419