Hey guys was surfing for some problem solving for my dx500 and came upon this site. I have to say lots of very knowledgeable people here. Didn't want to be counted as a robot so here i am. I'm out in my rig just put in this dx500 behind my general out a 5' skip shooter on a big gumdrop and getting a weird feedback after I key mic and release (is audible through cb speaker) feedback persists until relay in amp turns off....Most times anyways sometimes continues until I key a few times....on bench in shop (dubs in illinois) 2.5watt carrier 60watt swing barefoot 110watt carrier 480swing with amp on......In truck amp is on relay is clicking on but no noticeable difference in TX power from barefoot...sink gets too hot too quickly and that weird feedback (doesn't present on barefoot)...everything wired right no warm cables....The only thing I can think of is gumdrops or antenna a bad match but I'm fairly new to all this...was lookin to enjoy some skip but I'm stuck barefoot for now still until I get this solved