The NP-503 from NP Technologies Inc is a RF Amplifier with Frequency 27 to 100 MHz, Gain 48 to 50 dB, Gain Flatness ±0.5 to ±1 dB, Output Power 49.03 to 51.76 dBm, Output Power 79.98 to 149.97 W. Tags: Power Amplifier. More details for NP-503 can be seen below.