The 28-36-02A from TX RX Systems is a RF Duplexer with Frequency 132 to 150 MHz, Band 1 132 to 150 MHz, Power 400 W, Insertion Loss 1.5 dB, Isolation 50 dB (Between Channel) / 85 dB (Per Channel). Tags: Rack Mount. More details for 28-36-02A can be seen below.