BUY BLF404 https://www.utsource.net/itm/p/325507.html
UHF power MOS transistor - Application: Broadcast, PMR and UHF Communication transmitters ; Description: UHF VDMOS RF POWER Transistor ; Efficiency: 55 %; Frequency: 500 MHz; Load power: 4 W; Operating voltage: 12.5 VDC; Power gain: 11.5 dB
Description: The BLF404 is a high-power, N-channel, enhancement-mode, lateral MOSFET designed for RF power amplifier applications. Features: Low thermal resistance Low gate charge High breakdown voltage Low input capacitance High power gain High ruggedness Low noise figure Applications: RF power amplifiers Mobile communication systems Broadcast transmitters Industrial and medical applications (For reference only)