ARRL Technician Practice Exam

What device is used to increase the low-power output from a handheld transceiver?

1. An RF power amplifier

2. An RF preamplifier

3. A low-pass filter

4. A signal generator

The correct answer is: An RF power amplifier

The correct answer is an RF power amplifier, which is specifically designed to take the low-power output from a handheld transceiver and amplify the signal to a higher power level. This is particularly useful in amateur radio, where operators may want to increase their transmission range or improve the signal strength when communicating with others. An RF power amplifier works by taking the weak RF signals generated by the transceiver and boosting their power, enabling them to reach farther distances and be received better by other stations. This is essential for effective communication, especially over longer distances or in areas with high interference. In contrast, an RF preamplifier increases the strength of weak incoming signals before they reach the transceiver but does not amplify the output to enhance transmission power. A low-pass filter is used to remove unwanted high-frequency signals from a transmission but does not amplify power. A signal generator is used to produce RF signals but is not involved in amplifying an existing signal from a transceiver.