I have a Bel RX-65 Rev. 6.3 (if that makes any difference) and it has all of a sudden stopped alerting to K-band. Passed an LEO in a speed trap where I know uses K-band. Then went to the CVS which uses a K-band door opener and did not alert me at all, but my old Express 936 did so I know it was on. X and Ka band both still work great, even had a very long range alert on a 34.7 NYSP yesterday.
Anyone know what the problem could be? I reset the detector and it still has the problem. Thanks guys