Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-003-005
As a power amplifier is tuned, what reading on its grid current meter indicates the best neutralization?
- A Minimum grid current
- B Maximum grid current
- C A maximum change in grid current as the output circuit is changed
- D A minimum change in grid current as the output circuit is changed
Correct answer: D — A minimum change in grid current as the output circuit is changed. From the official ISED question bank, verified word for word.
Why
When you tune a power amplifier, neutralization cancels unwanted feedback that can cause instability. 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.