Topband: "Is your feedline also an antenna?"

Tom Rauch w8ji at contesting.com
Mon Oct 10 11:42:17 EDT 2005


> There is one more point I'd like to have clear: some
people say that in this
> kind of switching, all antennas that are not in use should
be shorted to the
> ground. What do you think about it?

Another bad rumor. Shorting unused ports to ground almost
always guarantees maximum cross coupling in a switching
matrix.

Someplace between an open and short will be minimal
coupling. The exact value varies with your switching layout.

By the way, you could have a contaminated shield on your
outside cable from water ingress. I only bury cables with
flooding compound inside that are designed for burial.

73 Tom



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