Some radios seem more susceptible than others. When a newly licensed friend
got arcing and shocks from a Z match feeding a low 210ft doublet, I fitted
2k2 carbon resistors from each feeder to ground.
David
G3UNA
For the future, disconnect the antenna when not in use. The most likely
cause of those diode failures is a static surge. Even in the winter
months, snow/rain/wind static can build up a substantial charge even in
the absence of lightning.
73,
Don W3FPR
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