Posted by
Ed - K9EW on
Mar 02, 2006; 3:14pm
URL: http://elecraft.85.s1.nabble.com/Coax-Switch-between-two-rigs-tp387104p387112.html
Hi Lee,
If your coax switch had 60db of isolation between ports (that's about the
most you could expect for small $$$), that would mean that a 100 watt signal
into Port A would produce a 0.1 milliwatt signal on Port B. While
0.1milliwatt into the receiver on Port B shouldn't destroy the front
end, it is
a whopping big signal. I used to switch my boatanchor rigs with coax
switches, but finally decided to use the method described by Don (the old
'disconnect and short' method). I have carried this method over to my QRP
rigs. I use a piece of aluminum angle stock from the local hardware store
with HF feedthrough connectors, to connect to the rigs. The antenna goes to
one of the rigs, and the other connectors have shorting plugs in them. Ron
makes an excellent point about SWR. One tune-up into a high SWR (who hasn't
done that?), could ruin your day. I'll trade the inconvenience of
disconnecting the unused rig for the peace of mind that neither rig will be
over-stressed. You can probably still monitor one rig with the other
without having a direct connection.
73,
ed - k9ew
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