What is a symptom of RF feedback in a transmitter or transceiver?

A common symptom of RF feedback in a transmitter or transceiver is garbled, distorted, or unintelligible voice transmissions. This occurs when transmitted RF energy gets fed back into the audio circuitry or other parts of the transmitter, causing irregularities in the transmission quality. When RF feedback interferes with the audio signal, it can lead to distortion that makes the transmitted voice difficult to understand for the listener. This symptom is particularly noticeable during voice communications, where clarity is crucial for effective communication.

While excessive SWR at the antenna connection, issues with staying on a desired frequency, and frequent blowing of power supply fuses could indicate problems in the transmitter's operation, they do not specifically point to RF feedback issues like distorted audio does. Other factors might lead to those conditions, but they don't directly correlate to the effects of feedback in the system.