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INRAD Antenna Disconnect Actuators
Reduce the chance of station damage from lightning. INRAD Antenna Disconnect Actuators automatically disconnects the antenna and feedline from your radio and grounds the antenna.
Prevents static discharge, surges and lightning-strike effects from damaging your radio and associated equipment.
The disconnect actuator is installed at the output of the transceiver, amp, or tuner in line with the antenna. Plug the DC cable into +12VDC (ideally from the transceiver). When transceiver power is on and +12VDC is present, the antenna is automatically connected. When DC is off, the antenna's signal and ground are shorted together and grounded, and both are disconnected from the radio. 1500 watts power capability, 1.8-50 MHz. Available in two versions. DCA1 allows a single transceiver connected to a single antenna output. DCA2 allows two transceivers to be connected to two antenna outputs.
Read the operation manual here.