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The most common use of the MOSFET in radio communication is for amplification. Modern solid state transceivers use the MOSFET for amplification in the final stage of a radio transceiver. The MOSFET provides current and voltage gain yielding an output current into an external load which exceeds the input current and an output voltage across that external load which exceeds the input voltage.The most common use of the MOSFET in radio communication is for amplification. Modern solid state transceivers use the MOSFET for amplification in the final stage of a radio transceiver. The MOSFET provides current and voltage gain yielding an output current into an external load which exceeds the input current and an output voltage across that external load which exceeds the input voltage. In ham radio the PA refers to a power amplifier which may or may not be the MOSFET type.