Description
Aftermarket Heathkit 404-283 SSB crystal filter mfd. by Filtech, model # 2033, fits many SB and HW series receivers and transceivers; SB-301-401, SB-101, SB-310, HW-100/101, possibly others. No bandwidth or impedance specs available, however unit has been described as having similar specs to Heathkit’s 404-283 with better quality. (G1W) Used checked.