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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