In an FM transmitter, which stage draws the most electric power?

The power amplifier (PA) is the final active stage in a transmitter before the signal reaches the antenna. Its primary job is to take the weak Radio Frequency (RF) signal from previous stages and boost it to the final transmit power level, which can be tens or hundreds of watts. Because it performs the heavy lifting required to generate the final RF output power, it inherently draws far more electrical current from the power supply than low-level signal processing stages like the oscillator, modulator, or speech amplifier.