J-Pole Collinear for 2m

A makeshift, phasing-coil variant of a 2m J-Pole Collinear was recently homebrewed.

J-Pole Collinear for 2m - details

It was fabricated with a single length of 20SWG copper wire and taped to a bamboo pole for rigidity.

The coil section was 64 turns close-wound on a 10mm mandrel and then stretched to a length of 300mm.

SWR measured close to 1.5:1 across the 2m band.

Antenna performance exceeded that of a normal J-Pole at the same height.

A 16SWG rugged version, encased in a PVC pipe, is in the works.

Related post: PVC-encased Vertical Antennas for 2m
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