I live on a city lot with a pretty good amount of RF noise. I am talking about 'static' that from time to time will blanket 2MHz-15MHz. I have no problem getting my signal out with 100w, but sometimes only the strongest stations are readable to me. This is particularly a problem in that I am a net controller for an 80m SSB traffic net that gets 50+ check-ins daily. After investigating and experimenting with various possible solutions (different antennas, different installations, different locations on my 1/2 acre property [narrow and deep]), I have found that 100ft wire arranged in a loop on the ground gets rid of the noise and allows me to copy everyone--with lower signal level, but GREATLY improved signal to noise ratio. What I am now after is pretty accurately described in the thread title. My radio has only one antenna connection for HF, and I am not about to spend $2K on a new radio that I do not need just to get a second antenna connector. I was somewhat surprised to find that such switches seem to be available for SDRs, but none are speced for usage the other way round. Any ideas (about a switch)?