Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-003-003
In a simple 2 stage CW transmitter, the transistor in the second stage would act as:
- A the master oscillator
- B an audio oscillator
- C a power amplifier
- D a frequency multiplier
Correct answer: C — a power amplifier. From the official ISED question bank, verified word for word.
Why
In a simple two-stage continuous wave transmitter, the first stage creates the steady radio signal, while the second stage takes that weak signal and boosts its strength so it can travel far; this boosting role is called a power amplifier. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.