Power splitter DCF77 4446, 4 ports, active (230V AC): If there are several DCF77 clocks in a building, you can use the 4x antenna amplifier with potential isolation. The structure of the device is the same as the FG444400 antenna amplifier, but without indirect lightning protection. The enclosure contains the main unit and several amplifier modules. The signal is fed through a preamplifier to 4 potential free output, and sent through insulated BNC connectors on the wider side of the enclosure