I bought a signalink at the Deerfield nearfest last fall and tried to get it to work all last fall and winter and finely sold it last may. Back in July, I got a brand new,right out of box signalink and set it up as shown in the instruction manual and I could not get THAT one to work properly. Another ham told me it is probably RF that is causing it not to work and tried torrides and also have RFI inline filter ( the in line filter was on BEFORE the signalink ) and still no work. I reduced power to 1 watt,nope. Did just about everything humanly possible and nothing worked,redid the settings,nothing. So to settle my frustrations, I gave it away to another ham ( next town over ) and wouldn't you know it, he got it to work perfect! he asked if I wanted it back and I said NO WAY IN HELL!!!!!you own it and I'll keep doing it acoustically like I have for the past 10 years!