I've been using the Panasonic HD AVCCAM and Sony UTX-B2 wireless Transmitter and Receiver for several years with no issues. Lately I have noticed the recorded audio drops a lot as the transmitter is moved away from the camera and Receiver. Fifteen feet makes a hugh difference. Also, when the cable, going from the Receiver to the camera's plugin mic hole, is plugged all the way in the sound will not work at all. When the cable is plugged in by about 75% it works very well up close, but as I mentioned, not from further away.
Any info would be greatly appreciated,