Without any input signal you must measure 1.5V like in the schematic, if the voltage is higher the 2 transistors can burn. At 12V and 0.1W input rf power the output is 6W and with 0.5W the output is ...

This 300W RF power amplifier for your fm transmitter has 2 x TP9383 transistors. 300W radio power amplifier for 88 – 108 MHz band. 300W RF power amplifier circuit diagram ...