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CW/Audio Filters.

MFJ-751B - Super Tunable CW Audio Filter

The MFJ-751B - Super Tunable CW Audio Filter. Zero in SSB/CW with tunable peak and notch filters. Eliminate interference. Tune frequency 300 - 3000 Hz. Vary bandwidth 80 Hz to nearly flat. 50 dB notch. 12 VDC at 300mA. Read more

MFJ-722B SSB & CW Audio Filter

The MFJ-722 SSB & CW Audio Filter.One of our most successful products for improving reception, particularly favored by the CW enthusiast. Audio filters can provide very cost effective narrow bandwidth reception. Some operators actually prefer ... Read more

MFJ-752C - Dual Tunable CW Audio Filter

The MFJ-752C all mode dual tunable filter has variable bandwidth 40 Hz to almost flat, eliminates noise and heterodyne notch depth to 70 dB, input for two rigs switch selectable noise limiter, and more. Read more