First build a regular MonoBand J-Pole from the Copper Cactus plans for a 2-meter antenna, leaving off the top pipe cap.
Build a second J-Pole, which will look like an L-Pole, the vertical is
38-3/4 inches from the top of the antenna, down to the centerline of the
horizontal member.
The lower leg of the L consists of two
horizontal pipes spaced as close together as you can get them using standard 90
degree elbows.
From the centerline of the vertical, to the
centerline of the fittings at the end of the horizontal members the distance is
18 inches for 2-meters. I have not calculated the exact measurements for any
antenna other than the 2-meter band. A final 90 degree elbow is placed directly
under the vertical section and is soldered to the top of the existing
J-Pole.
The finished product resembles an L on top of a J, of course the lower leg of the L is two pieces of horizontally positioned pipe.
I hope you can visualize this. As soon as I get the time, I will try to make a new posting with drawings included.
73+ de Gary - KGØZP
Document Revision Date 2/26/98 Applicable To This Page Only