The Comtech AR178238-50 Solid State Amplifier 1.7 GHz - 2.3 GHz, 50 W is a rack-mountable unit with forced-air cooled by blowers built into the mechanical package. It operates at a frequency range of 1700-2300 MHz, contributing to an effective output power at 1 dB compression.The Comtech series amplifiers are rack-mountable units that incorporate the series AM amplifier in a cabinet containing a built-in universal AC power supply (for models up to 100 watts).