I realize this isn't about taping, but it is about microphones, so...
I have a Sennheiser EW 300 G3 wireless mic system, used in a Catchbox throwable mic. Every once in a while, I get some interference that sounds like white noise. It comes at random, rare intervals, and doesn't seem to be caused by anything in particular. I've had it sitting on my desk for the last several hours and haven't gotten a peep out it, so I can't reproduce the condition. It's set at 533.550 MHz. The other mic in the room is an AT, set at 495.500 MHz.
Any ideas? Thanks!