I recently had a conversation on the radio with another Ham who had built a 6 Meter wavelength band “J” antenna. He was getting some rather strange performance from this design, so I asked him where or how he had come up with the antennas dimensions. He referenced an Internet web page to me where
The mirror-image J-Pole is very easy to construct and requires only two T-Fittings plus a length of copper pipe.To visualize the antenna, one must only picture a 3 half-wavelength vertical and a 2 quarter-wavelength vertical positioned a few inches away from and centered on the the tall vertical. Construction of the mirror-image J-Pole is accomplished
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
Dear Fellow Hams Here are the numbers for the Copper Cactus J-Pole antenna!I hope you are already familiar with the construction of the standard J-Pole antenna, so I won’t go into any unnecessary detail. The antenna may be built as a MonoBander, DuoBander, TriBander, QuadBander or whatever with great success.You can either feed it with