The MRF1518NT1 from NXP Semiconductors is a RF Transistor with Frequency 400 to 520 MHz, Gain 13 dB at 13 MHz, Power 8 W, P1dB 8 W, Supply Voltage 12.5 V. More details for MRF1518NT1 can be seen below.
450 Watt, 50 Volt, 3.1 to 3.5 GHz, GaN RF IMFET
15 Watt, 50 Volt, DC to 4 GHz, GaN RF Transistor
15W, 300 MHz to 1.215 GHz, GaN RF Input-Matched Transistor
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