On my drive home this afternoon I started getting an intermittent K-band alert, which never happens. I figured it must be a LEO, right? Well, I kept moving through traffic as it ramped up over the course of 3 or 4 miles which told me I must be creeping up on the source, whatever it is. (I got all excited when I saw a pair of SC staties on the opposite side but knew they weren't the source when the arrow kept pointing ahead.) Eventually the thing went full-scale on one K-band source and the arrows turned around. So I look to my right and there's this red minivan, some guy talking on his cell, and some crappy RD that I didn't recognize stuck to the windshield. The arrows pointed to the side, right at him, and then behind as I passed. I eventually got the idea to turn off POP, and the alert did go away. I was a quarter mile ahead of him by that time but the signal was so strong I ought to have been within range still.
I'm surprised. I've seen this kind of thing on Ka, but never K. Could I have found one of those old Uniden RDs? I know, I know..."turn off POP!" Today was the first time it gave me trouble in two weeks. Off now, though.
After looking through a few dozen pictures, the only thing that comes close to looking like what I was is a plain-old Cobra XRS****. I definitely would have expected a Ka false from that.