DX Engineering is excited to now offer the A/B Station Selector Interlocked Coaxial Relay—a drop-in replacement for the legacy Top Ten Devices A/B Station Selector. DX Engineering acquired Top Ten Devices in 2021.
TheA/B Station Selector is designed for two-station multi-operator or Single Operator Two Radio (SO2R) contesting from 160 through 6 meters. Two radio inputs and one output for an amplifier, antenna or another relay allow the A/B Selector to function as two interlocked SPST normally open contact coaxial relays when controlled by a user-provided SPDT switch or antenna selection automation.
Featuring excellent port-to-port isolation, low SWR, and low insertion loss, this device is a critical component that enables a single radio to access the shared output port while simultaneously isolating the other radio from that port. With over 80 dB of isolation between the selected and unselected ports, there is no danger to the opposite receiver from high energy overload or burnout.
In place of a manual switch, the A/B Selector can be controlled from a distance, or remotely with automation, to select between two antennas or two remote antenna switches for one station feedline. It can also be used to remotely toggle a transceiver, amplifier, or station output to either an antenna switch for normal operations or a dummy load for testing and tuning, instead of using a port on a remote antenna switch for the dummy load.
Other features include:
- Two A/B Station Selectors may be configured as a DPDT reversing switch. This is useful for switching two transceivers to two different towers, two antenna switches or two amplifiers that are tuned to different bands or segments, for SO2R stations.
- Multiple A/B Selectors can be configured for a Multi-2 or Multi-Multi contest station in combination with third-party multi-port antenna switches and band decoders to create an automated band-specific antenna selector system.
- This relay features three UHF female/SO-239 connectors, Radio-A, Radio-B and Common, and a removable control connector with compression screw terminals. DC voltage input is +12 to 14VDC @ 110mA with sink-to-ground connections for A or B port selection.
- It may be used for two different switching systems: one common input to two outputs or two inputs to a single common output.
- A single radio or amplifier connected to the common port can be remotely switched between two antennas connected to A and B, or between two amplifiers feeding separate antennas. Alternatively, a station may use the switch to select between an antenna and a dummy load.
Visit DX Engineering for more details about the A/B Station Selector Interlocked Coaxial Relay.
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