If I've learned one thing about my V1 it's that Ka = cop. No questions, no variation. (If only that were the case with K-band alerts!) But I just got my girlfriend a Cobra XRS 9700 and I'm not so sure that the pattern stands with this detector. On one of my around-town test drives with it I picked up two or three 1/4-2/4 signal strength hits that I couldn't explain. One was near a highway overpass, so it could have easily been radar passing overhead. But the other two are a complete mystery. (They generally went away after a few seconds.) I wandered around a bit looking for someone running instant on but I couldn't find anything.
Have any of you seen similar behavior when using lower-end detectors? It seems to have OK range and filtering in other circumstances. It's just odd to me that it would false noticeably on Ka.