Question T7A10
From subelement T7 - T7A
What device increases the transmitted output power from a transceiver?
Why is this correct?
An RF power amplifier is specifically designed to increase transmitted output power from a transceiver. It takes the relatively low power output from your radio and boosts it to a higher level for transmission. A voltage divider actually reduces voltage and would decrease power. An impedance network matches impedances but doesn't increase power output. Only the RF power amplifier serves the specific function of power amplification for transmission.
Memory tip
Look for the word 'amplifier' when questions ask about increasing power or signal strength. Amplifiers boost signals, while dividers reduce them, and networks typically match or filter. This pattern applies across many electronics questions.
Learn more
RF power amplifiers are particularly valuable for extending communication range, especially on HF bands or when using low-power transceivers like handhelds. They must be properly matched to your transceiver's output impedance and should include appropriate filtering to prevent spurious emissions per Part 97 emission standards. Many VHF/UHF amplifiers include mode switches (SSB/CW-FM) because different emission types require different amplification characteristics for optimal performance and regulatory compliance.
Think about it
Why do you think an RF power amplifier might not always be the best solution for improving your station's performance compared to upgrading your antenna system?