At the Herriman Amateur Radio Club meeting on July 11, 2015, seven members chose to construct a "Dual-Band J-Pole" antenna for the 2m and 70 cm bands. Jeffrey Bail (NT1K) redrew the original plans and added the dimensions needed to build the antenna. HARC member Lloyd Taylor (K7PV) purchased the materials and members got to work. The J-pole antenna required an SO-239-to-3/8-24 antenna adapter, 3/8-inch aluminum rod, and a short section of 1.5-by-1.5-inch aluminum angle.
Club members had to cut lengths of 3/8-in aluminum rod to craft the antenna radiator, and the matching stubs. The rod sections required a bit of grinding to remove cutting burs and to slightly bevel the ends for threading.
The builders ran into problems chasing the 3/8-24 threads on rod ends, probably due to tool malfunction. The project will continue at the August 8th meeting when we have a better thread die. HARC welcomes hams and non-hams to all club activities. --Jon Titus, KZ1G