Comtech PST offers Series BHE Amplifiers that are arranged in a wide variety of configurations with operating frequency ranges from 20 to 1000 MHz. These AB linear amplifiers provide load VSWR protection by way of an electronic power output turndown system employing negative feedback techniques. The system is elf-correcting as a function of load VSWR to infinity, at any phase angle with a typical response time of 60 µsec.