Discussion
Which failure would make a receiver's tuning meter read full scale on every station?
Answer: D
With the feedback path broken the stages run at full gain regardless of signal strength, so the detector saturates and the meter pins on anything. A failed loudspeaker gives silence with a normal meter. An open antenna gives low readings. And a padder fault spoils tracking, giving mistuning rather than saturation. Predicting the symptom from the broken loop, rather than working backwards from the symptom, is often the faster route.
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