Simple ¼ λ Ground Plane for 2m

This simple ¼ λ ground plane antenna is based on G3OGR - OM F.G. Rayer's design for a 2m vertical antenna.

 ¼ λ Ground Plane for 2m - details

It's built-in at the top end of a 25 foot long, 2-piece telescopic aluminium pipe mast with the elements made of 3/8" aluminium tube.

A view of the ¼ λ Ground Plane for 2m

The elements are flattened at the ends to facilitate sealing/mounting/coax connection and the joints are made water-tight/corrosion-resistant with epoxy sealant.

This antenna has been up for more than 10 years and still going strong.

Related post: Moxon Antenna for 2m
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Coax Collinear for 70cm

This 70cm Coax Collinear Antenna was homebrewed one evening in the year 2008.

The job was made simple, thanks to N1HFX - OM Mike Martell and his detailed article 'Build A 9 dB, 70cm, Collinear Antenna From Coax'.

A view of the Coax Collinear for 70cm

All instructions were strictly followed.

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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