I recently acquired a Drake PRN1000 that is in excellent condition, to replace my ICR-71A that was far too complicated for the type of SWL I do. I noticed that the Drake, when connected to an antenna made of speaker wire, tends to pick up some sort of interference from some local FM stations. The interference was incredibly strong and washed out the entire 7 MHz band, and parts of the 9 MHz band as well. In my playing around with the antenna, I noticed that if I disconnected the antenna from the ground terminal most of the interference went away, although some still persists in the 9440-9550 kHz area. Also, I've been noticing that I'm only picking up stations from Asia, although that problem began long before I switched radios. What's going on here?