inventor Horace Martin. Designed for 20-50+ WPM. 110 Standard Painted base/chrome ...
Yaesu FT-817, 857 and 897 radios. The 500-Hz CW filter contains a 7-pole Collins ... FT-857 or FT-897 to recognize it as a 500 Hz or 2.3 kHz filter. OPF-CW $114.99 ... II with KENWOOD radios such as the TS-50 and TS-480, requires the LDG K-OTT and ...