VHF Portable Antennas
Open-stub design from Arrow Antennas.
Base angle: hole centers= 3″ drill and tap 3/8-24 the short element, 1/2″ for mounting the SO-239 stud mount.
Elements are 3/8 Al round 6061T6
Cut long element= 37 3/8″ , thd 1/2″ as 3/8-24
Cut short element= 12 3/8″, thd 1/2″ as 3/8-24, add jamb nut
drill and mount a TV mast U-clamp on the face of the angle stock.
Dimensions for 2m:
Al angle 2x2x5″ hole centers 4″
Cut long element= 57 1/8″ thd 1/2 as 3/8-24
Cut short element= 19 3/4″ thd 1/2″ as 3/8-24
For more details and parts go to Arrow Antennas .
Note: These are not advised as a base station antenna without a lightning arrestor!