The MRF1535N from NXP Semiconductors is a RF Transistor with Frequency 400 to 520 MHz, Gain 13.5 dB at 13.5 MHz, Power 35 W, P1dB 35 W, Supply Voltage 12.5 V. More details for MRF1535N 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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