Having used a PFR-3a for some time, I was quite spoiled by the narrow / sharp filter - the signals seemed to just pop up out of the silence, quite eerie for the first few times. I recently purchased a 300 HZ Collins filter for my FT-817 - while they could still be had. My goodness. what a difference it makes. As other have noted, use a wider BW for calling / searching, go to the narrow filter for a chat.