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High voltage switch/relays for antenna?
TF3KX wrote: Any comments or suggestions? I assume you are going to switch the loop for lowest band into a bent dipole, and close the relay on higher bands. You might consider a trap, because a relay would have to be very special at any power level. You are deealing with much more than twice the voltage at the ends of a normal dipole from contact to contact. I think your only hope for a relay is a high voltage vacuum relay with wide terminal spacing and good coil insulation. One of the large high voltage glass vacuum relays would be best. It might be possible to build a trap and adjust antenna length so it would work, but the trap would have to be very special in construction. It may not be practical. 73 Tom |
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