LDG TW-1 User Manual page 5

On the rear panel, there are two SO-239 RF connectors. The right-hand connector is the RF input
(labeled Radio) for connection to your radio, and the left-hand connector is the output to your
tuner or antenna (labeled Antenna).
The 2.5 x 5.5 mm jack coaxial DC power connector is on the right.
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