Digital Filter, Digital Signal Processing Filter, Adjustable Frequency SSB CW Amateur Radio Digital Filter, with OLED Display, for YAESU/ICOM ft-817 857 897 kx3 ft-818 : Amazon.in: Electronics
How to assemble a narrow CW filter for your Yaesu FT-817/FT-818/FT-857/FT-897 (an affordable YF-122C equivalent) | Q R P e r
How to assemble a narrow CW filter for your Yaesu FT-817/FT-818/FT-857/FT-897 (an affordable YF-122C equivalent) | Q R P e r