The EDX-138-174-4.5-10-125T from Excel Wave is a VHF Base Station Duplexer that operates from 138 to 154 / 150 to 174 MHz. It has Tx-Rx spacing from 4.5 to 10 MHz with an insertion loss of less than 1 dB and isolation of over 70 dB. The duplexer can handle an input power of up to 125 W and has a VSWR of less than 1.25:1. It can be easily tuned over the frequency range by adjusting 4 tuning rods for the Rx channel and 4 tuning rods for the Tx channel. The duplexer is available in an EIA rack front panel that measures 19.00 x 5.44 x 3.50 inches with N-type Female connectors.