CF-413B Comet 1.3-460MHz/840-1400MHz Duplexer If you are in need of splitting off your HF, VHF, or UHF signals, then Comet Duplexers are what you are looking for. * TX and RX from two radios at the same time into a dual-band antenna. * Combine a dual-band radio with separate outputs into a dual-band antenna. * Separate a single connector duplexed radio into separate antenna systems. * Allow a single coax run into two antennas at the top of the tower, and two radios at the bottom by using a duplexer at both ends of the coax run, avoiding additional coaxial cost and weight.