Question T6B11
From subelement T6 - T6B
What is the term that describes a device's ability to amplify a signal?
Why is this correct?
Gain describes a device's ability to amplify a signal by making a small input signal larger at the output. This is the fundamental definition in electronics. Forward resistance, forward voltage drop, and on resistance are all electrical characteristics that describe voltage/current relationships in components like diodes and transistors, but none describe amplification capability. Gain specifically measures how much stronger the output signal is compared to the input.
Memory tip
Remember the pattern: 'Gain' always relates to signal strength increase or amplification across all amateur radio contexts. Whether discussing transistor gain, antenna gain, or amplifier gain, the term consistently means 'making signals stronger.' The other options describe static electrical properties, not dynamic amplification processes.
Learn more
In amateur radio operation, gain appears everywhere: RF preamplifiers provide receiver gain to improve sensitivity, power amplifiers provide transmitter gain to boost output power, and antenna gain concentrates RF energy directionally. Understanding gain helps you optimize your station's performance - from weak-signal reception on VHF/UHF to maximizing effective radiated power within emission standards. Gain is always about getting more signal where you need it.
Think about it
Why do you think transistors revolutionized electronics when vacuum tubes could already provide gain, and how does this relate to modern amateur radio equipment design?