Bob Selbrede, K6ZZ wrote:
> I went up the tower yesterday to take down the Christmas
> lights and noticed something disturbing. I happed to notice
> that the boom to mast plate (stock 1/4" aluminum plate) on
> my KLM 40M4 had stress cracks radiating out from the points
> where the four clamps attach the plate to the mast.
This is one reason to use heavy galvanized steel plate instead of
aluminum. There's just too much stress on these plates to use anything
which fatigues easily.
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