The Model 31OL is a broadband solid state power amplifier covering the frequency range of 250 KHz to 110 MHz. Over 10 watts of RF power can be produced at the output, with low harmonic and intermodulation distortion. A highly linear Class A design, the Model 31 OL will amplify inputs of AM,FM, SSB, pulse and other complex modulations, with minimum distortion. The 50 dB gain of the unit permits it to be driven to its full power output by any signal or sweep generator capable of supplying a minimum -10 dBM (.07 volts RMS) signal level into its 50 ohm input. Virtually all commercial signal and sweep generators are capable of supplying this signal. The Model 31OL operates over its entire bandwidth without tuning or other adjustments. It is capable of supplying useful power output up 150 MHz, at reduced gain. This unit is unconditionally stable and will not oscillate for any possible combination of source and load impedances. It is protected against failure due to output load mismatch and/or overdrive. The Model 310L will withstand a +25 dB overdrive (input signal of +15 dBM) for all output load conditions including both short and open circuit loads. Output RF voltage level, as well as power output into 50 ohms, is monitored by a front panel meter. An integral power supply permits operation directly from the AC line.