I just read a review on radartest.com of the Whistler SRT-30R.
I just drove from SLC Utah via I-80 yesterday to Santa Cruz, California. About 850 miles, most of it open desert. I was using a borrowed SRT-30R unit, (still waiting for my Redline) and according to radartest.com, this low end, under $100 unit will pick up Ka at over 10,000 feet.
Best Radar Detector Under $199: Review of BEL (Beltronics) Vector 955, Cobra XRS 9950 and Whistler XTR-695
I was cautious during the drive, and encountered 3 Nevada Highway Patrol cars who had already pulled someone over. The detector 'warned' me when I passed them on the side of the road, perhaps 150 feet away. (Not impressive).
When I hit California going over the Sierra there are a couple of Ka 'speed signs' that the unit picked up about 1/4 mile away.
I also got zero hits when passing through "CHP on duty" construction zones, passing perhaps 12 CHP units spread over a 15 mile stretch. Zero, nada.
My older (now broken) detector ALWAYS warned me of these construction zone protection units. 100% of the time they had their radar on. I find it hard to believe that none of the dozen units I passed had their radar on.
Of course this borrowed unit could be bad, but it is a new unit and the guy never used it, put it in his desk when someone gave it to him as a gift - he already had a better unit.
Anyway, just wondering if anyone is picking up Ka at over 2 miles 'real world' on any of their units. Particularly open road Interstate driving.