I was going to a restaurant tonight, and was driving down a row of cars to find a parking place when my Pro 78 went up to 9 on KA band, almost instantly. I was driving slow, and I thought maybe a LEO was in the lot and forgot to turn off his radar, but I didn't see any cop cars. After about 4 seconds the alert died completely, and the detector was silent. I noticed a car that I was driving past (it was parked facing the passenger side of my car) had a radar detector in the window, and I was almost 100% sure it was a Cobra because it was (literally) pointed at the sky. I turned down that row and found a spot right next to him. Sure enough, a brand-new '08 Toyota Avalon with a Cobra (not the cheapest model, maybe around $100) on the windscreen.
Since I saw no other RDs around in other cars and no LEOs, I assume my strong KA alert was from this Cobra.
Here's the question: Is something wrong with my unit? I have Rev. C with Filter 2 and POP off. I had never seen it do this before when i've been around other Cobras.
From what I've heard here, the settings I use (POP off and Filter 2) are suppose to eliminate falses from other units.
Kinda liked seeing it light up though, it hasn't gone off for any LEOs in weeks (maybe even a month). Police presence has really dropped here, but that's another story.
I'm sure it's working because there is a false K band alert around my school that I still get.