🔍 Key Concepts

• How regenerative receivers work and why they can become noisy when components are out of tolerance • The role of tubes, resistors/capacitors, and audio transformers in a multi-stage AF (audio frequency) amplifier chain • Whether a single faulty part or multiple possible faults can reasonably cause the same symptom (noisy operation)

💭 Think About

• For each option, ask yourself: Could this specific fault realistically introduce noise (hiss, crackle, instability) into a regenerative receiver? Why or why not? • Think about which components directly affect stability, biasing, and power supply filtering in a regenerative circuit. How would problems in those areas sound to the operator? • Consider whether exam questions on troubleshooting often focus on one likely cause or a group of related possible causes when a symptom is vague, like noisy operation.

✅ Before You Answer

• Review what defective tubes or poor connections typically cause: intermittent operation, crackling, loss of gain, or distortion • Recall how a defective audio transformer might show up: loss of audio, distortion, or unusual noise in the AF stages • Think about how grid resistors/grid capacitors and power supply components affect bias and filtering. Would defects here make a regenerative receiver noisy or unstable?