What is the effect of excessive microphone gain on SSB transmissions?
Frequency instability
Distorted transmitted audio✓Correct answer
Increased SWR
Sideband inversion
Explanation
Too much microphone gain overdrives the speech amplifier so the audio waveform is clipped, and an SSB transmitter turns that into distorted, splattering transmitted audio. It does not change the SWR, which depends on the antenna system, or make the radio unstable.