In my comments regarding phantomed relay switching of the feedline,
I did not consider the
higher impedance situations. Gary is quite correct, in his
observation (below). It's
of greater concern if the plan is to drive the antenna in modes where
sees >600 ohms. Like an 80m dipole fed on 40m, which would have 2k
or so. Voltage breakdown would become a significant factor.
You will want to have something better than the type of relay used to
50 ohm coax though. 1500 watts at 50 ohms is 273 volts. 1500 watts at
ohms is 948 volts and that is providing the swr is 1:1.
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