Discontinued Yaesu XF-127CN - CW Narrow Crystal Filter

300 Hz CW Narrow Crystal Filter. The Down conversion 9 MHz 1st IF frequency receiver construction, can realize narrow 300 Hz (optional), 600 Hz and 3 kHz bandwidth roofing filters. Implementing the extra sharp Crystal Roofing Filters provides superior close-in dynamic range and affords the best receiver performance possible. 300 Hz CW Narrow Crystal Filter for the FTDX-3000