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Jeremy, KC5TEK wrote:
"I`m not terribly concerned with rust as I plan on painting the whole assembly anyway." My 2-meter groundplane uses a GM telescoping car antenna as a radiator and steel shelf-support channel from Home Depot as radials. These are solid rust after many years and they still work fine. Groundplanes are best for fixed locations unless you are using a vehicle body or the like for your groundplane in a mobile application. Commercially, the simple whip antenna worked against a car body has almost universal acceptance. For workboats to get a little height for greater line-of-sight we used coaxial antennas. The vertical whip was half a diploe. A brass tube skirt served as the other 1/4-wave part of the vertical dipole. It could be elevated as high as convenient and worked as well as a groundplane but with no risk of poking out an eye on a tossing and turning boat. My ARRL Antenna Book has no construction article for the coaxial antenna. I wonder why? Best regards, Richard Harrison, KB5WZI |
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