Good day, Today I installed the Inrad #1303.2 (455.8 kHz) 500 Hz CW-filter in the FT-1000D's Sub Rx. Please have a look at http://www.remeeus.nl/english/hamradio/ft1000subrxfiltering.htm -- 73, Hans Remeeus (PA1HR) http://www.remeeus.nl Communication is about people, the rest is technology.