At 10:04 AM 1/13/2005, Tom Rauch wrote:
In virtually all cases the antenna system, NOT the relays,
will set the ultimate isolation in a system like you
propose. My problems here at my house, for example, are
largely determined by antenna spacing and path loss (and I
have some antennas 1/2 mile apart).
Boy, is this right, and it's why stubs and/or bandpass filters remain
essential. WE9V did a rather neat article in NCJ a while ago in which he
quantified the available isolation in his station, and all the numbers are
much less than even moderately careful relay box design will
deliver. W2VJN of TopTen Devices has done something similar in his book on
interstation interference, plus he gives some good ideas on how much is
enough and how to get there.
73, Pete N4ZR
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