I have the Sotabeam cw DSP filter as a peripheral, using it on another rig, and it is good. ?I tried it on the uBitx and it is a definite improvement. ?However, I'm also going to try my old favorite, the Hi-Per-Mite SCAF from Four Square QRP Group (). I have one with for each of my rigs and love it. ?The excellent QCX transceiver uses it as well.
Howard K4LXY
