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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