Tubes operated as Class C amplifiers are not...

Tubes operated as Class C amplifiers are not...

Question 1 of 27070sfkqIa5ERnLA60vE1BYm

Tubes operated as Class C amplifiers are not suited for audio-frequency amplifiers:

Question 1 of 27070

Q

Tubes operated as Class C amplifiers are not suited for audio-frequency amplifiers:

🔍 Key Concepts

• Class C amplifier conduction angle (portion of the input signal over which the device conducts) • Difference between RF (radio frequency) power amplifiers and audio-frequency (AF) amplifiers • Relationship between linearity and signal distortion in amplifiers

💭 Think About

• Think about how long, during each cycle, a Class C amplifier tube actually conducts current compared with Class A or Class B – what does that do to the shape of a complex (audio) waveform? • Which type of application can tolerate a highly distorted waveform that will later be cleaned up by a resonant (tuned) circuit – audio or RF? • Ask yourself: what is the most critical requirement of an audio amplifier driving a loudspeaker or headphones – low distortion, low current draw, or filament life?

✅ Before You Answer

• Review that Class C amplifiers are typically used with tuned RF circuits, not for wide‑band audio signals • Confirm that audio-frequency amplifiers generally require a linear relationship between input and output to preserve waveform shape • Before picking an answer, match the option that directly reflects the main performance limitation of Class C operation when handling audio signals