While trying to figure out how to move up a notch from my inverted V
antennas on 40 and 30 meters I came up with a crazy idea. I was
looking at building a rotatable dipole for 40 meters, either full
size or possibly shortened. A 70% of full size linear loaded 40
meter dipole is nearly a full size 30 meter dipole. Various articles
claim only about 1 dB reduction in "gain" from a full size dipole on
40. Could relays be used at the dipole feed point to short out the
linear loading, making a two band antenna? It seems good in theory
but if it were that easy, wouldn't someone have done it already? I
have no idea whether RF voltage across the relay contacts when
operating on 40 meters would be high enough to make this
impractical. Any comments, wisdom, or wild guesses?
Any alternative thoughts on building a 40 and 30 meter rotatable dipole?
73,
Paul N1BUG
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