The DSP CW Peaking Filter (DBF) on the FT-857D is incredibly effective. I have owned another FT-857 and that had the YF-122C, 500Hz and YF-122CN, 300Hz filters in. But, when you use this DBF, it makes you wonder is it worth spending the extra on the Collins filters? The width of the DSP filter can be set to 240Hz,120Hz or 60Hz and considering its "only" AF DSP, not IF, it's really very good indeed - just what you need when the bands are crowded.
Hello! I have bought the 300 hz filter,but my radio de ft 857 is not a D so no DSP inside? 73 Robert pa3geo
ha5orp 1 year ago
Roger on that, i have a ft-879d same radio almost, and the DBF although AF dsp is very good i have a 500hz filter installed also.
73's de oy1r
Dreamlgider 1 year ago