Steve, I was thinking it might have been you. I often snap on the DSP instead of the noise blanker but as is the case with so many pulse noise blanking circuits, super loud signals up and down the band trigger the noise level up and down. I figured that would be a thing of the past in a more expensive radio these days but it reminds me of the good old days when I would snap on the noise blanker in my Ten Tec Triton One. It helps, in a weird sort of a way, by copying a signal several KHz up the band without tuning the receiver up there when listening to the dits and daws of the line noise bleeping off and on, haw. Phil. [log in to unmask]