W4RT Electronics OPF-Y-BOTH-500
For Yaesu FT-857D
Great for CW & PSK CONTESTS
Improve your CW and PSK operating experience with the 500 Hz CW filter using factory-fresh Collins Mechanical Filter. Essentially identical to the Yaesu YF-122CN. Easy to install. Just remove the cover and set the menu as explained in the FT-817(ND), FT-857(D), & 897(D) Manuals.