Antenna Builders Converge

Antenna builders cut 3/8-in. aluminum rod for their J-pole antennas.

Antenna builders cut 3/8-in. aluminum rod for their J-pole antennas.

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.

Drilling and grinding took advantage of shade provided by an "inverted" hex-beam antenna also known as an umbrella.

Drilling and grinding took advantage of shade provided by an "inverted" hex-beam antenna also known as an umbrella.

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

About Jon Titus

Jon Titus received his first amateur-radio license as WN2KCZ in 1963. He returned to the ham world in the late 1970's and now holds an Amateur Extra class license, KZ1G. Jon has college degrees in chemistry and has worked in the electronics industry for many years
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