The MRF1570N from NXP Semiconductors is a RF Transistor with Frequency 400 to 470 MHz, Gain 11.5 dB at 11.5 MHz, Power 70 W, P1dB 70 W, Supply Voltage 12.5 V. More details for MRF1570N can be seen below.
1805 to 1880 MHz, 89 W Airfast RF Power LDMOS Transistor
4500 to 5900 MHz GaN HEMT for C-Band Radar Systems
GaN HEMT Transistor 1.2 to 1.4 GHz
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