The job was made simple, thanks to N1HFX - OM Mike Martell and his detailed article 'Build A 9 dB, 70cm, Collinear Antenna From Coax'.
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| A view of the Coax Collinear for 70cm |
A brass sleeve was soldered to the braid at the feedpoint and a SO-239 connector was used.
Both the ends of the antenna were waterproofed with epoxy.
SWR was close to 1.5:1 when checked at a power level of 50mW.
Signal strength with this antenna was 2-3 'S' points higher compared to that using a ¼ λ Ground Plane Antenna at the same height.
Related post: Direction-finding Yagi Beam for 70 cm
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