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New Groundmounted 80m 4 square


The thre lower alloy poles are 15m tall in total. Plus the 6 spoke capacity hat 6x 140cm I was resonant at 3800 khz. Maybe when I add the perimeter alloywire around the 6 spokes I will be at 3750
post 18 Sep 2020


Antenna 40 Meter Links

Shortened with 40 turns trap 7 mhz Dipole, GM4JMU
To construct each side of the antenna proceed as follows. Cut a 10.25 metre length of 24/0.076 insulated wire, and a 160 mm length of 40 mm o.d plastic tubing

Short dipole
The method of Linear-loading is a fancy way of saying fold back on itself It reduces the overall length of an antenna without resorting to loading-coils

Shortening your dipole
We are going to use an 80 meter 1/2 wave dipole for this discussion.An 80 meter dipole 3.8mhz is about 38.5 meters 126.3feet total length

Sloper sloping dipoles 40mt-80mt
Having only a single vertical support or limited horizontal space might be a problem.Such a problem can be solved by mounting a dipole at a slope

Super gain antenna project for 40 meters
It is based on the theory of super gain NVIS arrays, which reject QRM from low angles and produces a very high angle of radiation