Greetings, I have recently gotten my K3 # 661 back from Elecraft where all updates were installed. Running 4.51. I tried to use Noise Reduction, and when pushing the NR button, I get N/A. When holding the NR button, I get N/A. I don't find any NR menu items for NR. Is there some way that the NR can be toggled off? Any ideas from the gang? 73, Ken N6TZV