Setting up the LPX-14 Duracomm

The LPX-14 Duracomm is an ideal system for creating a homebase system. 

The LPX-14 provides a regulated 13.8 volts DC, which is ideal for powering Midland MicroMobile radios safely and reliably indoors, such as in a home, garage, or shop. 

Please follow the instructions to seamlessly connect your Midland MXT radio to the Duracomm system to get your new homebase up and running.! 

Begin by placing the LPX-14 power supply near both an AC outlet and your radio. Plug the LPX-14 into the wall using the included AC power cord, but do not turn it on yet. Locate the removable two-pin DC output terminal block on the LPX-14, which is where the radio power cable will connect. To get started, you will need a Phillips screwdriver and wire strippers. 

Next, prepare the Midland MicroMobile power cable. If your radio uses a cigarette lighter plug (such as the MXT105, MXT115, and MXT275), cut the plug off and strip about a quarter inch of insulation from both the red (positive) and black (negative) wires. If your power cable has ring terminals (such as the MXT575), cut the ring terminals off and strip the wire ends the same way. Make sure the radio is not connected to any power source during this process.

Once the wires are prepared, insert the red wire into the positive (+V) terminal on the LPX-14 terminal block and the black wire into the negative (-V) terminal. Tighten the terminal screws securely so the wires cannot pull loose, and ensure no bare wire is exposed. After securing the wires, plug the terminal block back into the LPX-14 DC output connector.

With all wiring complete, turn on the LPX-14 power supply and verify that its power indicator light comes on. Then power on the Midland MicroMobile radio. The radio should start up normally, just as it would when connected to a vehicle’s electrical system. If the radio does not power on, double -check the polarity and make sure the terminal screws are tight and the terminal block is fully seated.

For safe and reliable operation, keep the LPX-14 in a dry, well-ventilated area, and ensure all wiring is properly insulated to prevent shorts. Always connect an antenna to the radio before transmitting, just as you would in a mobile installation. This setup only changes how the radio is powered; microphone, antenna, speaker, and other accessories connect the same as they do in a vehicle installation.

You can use any of the Midland GMRS antennas for your new homebase, but if you need one specifically for the roof or to run outdoors, we recommend using the repeater antenna and coax, RPAT02 and RPCB02. The coax will connect to the radio the same way our MXTA24 coax will, using a PL259 connector.