Twice today, while calling someone using JT mode, I heard this horrible tree shredder like noise coming from the radio. Couldn't figure out what I had done. I'm religious about keeping the side air vents clean. But the noise was loud and frightening. After that first noise episode, all other transmissions were quiet and normal sounding.
I really panicked the second time it happened till I realized, ....duh I had moved my leg and bumped the paper shredder under my desk which just coincidentally had the same cycle time as a minute of JT transmission.
Don't get old fellow Flexonians...it really sucks!