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Bought a homebuilt once. Both radio antennas had been installed the same
way - with the cardboard drilling pattern glued to the aluminum - then left
there, and the antenna installed over the top of it. No ground plane.
The SWR was OK (<1.8:1), believe it or not. It worked out to 10 miles or
so - then things started getting weak and scratchy.
Even a fancy Anritsu test set I borrowed from work showed no great problem.
But when I removed those drill patterns, things started working fine.
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Re: "scratchy" radio transmission
