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Model CF-416B is the duplexer for transmitting/receiving all 2 bands of 144 MHz (included HF to 50 MHz) and 430, 440 MHz at the same time. Using one, or two CF-416B, you can connect transceivers and antennas by one coaxial cable. The combined high quality filters of CF-416B work to prevent of occurrence of TVI on the other hand (isolation of each connectors are over 60 dB). When using CF-416B for one frequency, the other connectors can be remain as (open), but additional dummy load will be much better.
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