The PE73SP1028 from Pasternack Enterprises Inc is a RF Surge Protector with Frequency 10 MHz to 1 GHz, Input Power 50 to 1500 W, Insertion Loss 0.1 dB, Operating Temperature -50 to 50 Degree C, Return Loss 26 dB. Tags: Gas Discharge Tube. More details for PE73SP1028 can be seen below.