A ¾ λ Ground Plane for 70cm

This antenna is my mast-mounted version of G2BCX OM F.C.Judd's design of a mobile
¾ λ collinear in his 'Two-metre Antenna Handbook'.

It is similar in construction to my ¼ λ Ground Plane for 70cm.

A ¾ λ Ground Plane for 70cm
A SO-239 connector is used.

The driven element, consisting of the ¼ λ lower portion, the ¼ λ hairpin stub and the ½ λ upper portion, is bent from a single brazing rod.

The blue plastic strut gives rigidity to the driven element.

SWR measured lower than 1.5:1 at 435 MHz.