The 4O3A RX Master Receive Antenna Controller allows for up to 4 receive antennas to be interfaced to a single transceiver. Built-in RX-only bandpass filters with ~45 dB of out of band rejection for 160, 80, 40 meters with automatic band switching possible from band decoders to a 15 pin jack on the back of the unit. Antennas can be manually switched from the front panel or controlled by +12VDC inputs on a rear panel DB-9 connector.
+12 VDC can be sent as an output from the unit on any of the 4 antenna jacks by front panel selection for actuating remote preamps or other antenna switching.
16 dB low noise preamp, variable, built-in. 36 dB range variable attenuator (-6 to -42 db). S/N input check puts a 50 ohm load on the front end to set RF gain on the transceiver properly.
Alphanumeric display plus LED indicators on front panel to show switching status at any given moment.