Not at all. That range is normal.
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There is some advantage to keeping the input voltage on tube equipment at or slightly below 120v, as the voltage on the tubes and to some extent their lifetime is proportional to it.
If you use an isolation transformer, many of these have selectable taps on the input side with allow you increase or decrease the output voltage by a few volts. The voltage here at lakeside is consistently 122-124, so I dropped the voltage by 4 volts to account for it.
If you don't use a voltage adjustable transformer, I wouldn't worry, as yours are small variations and they won't cause any harm.
I agree with Zargon......
I have been measuring my AC voltage of my dedicated circuits for my audio system. During the past 24 hours, the voltage has ranged from 121.5 to 122.3 volts.Loaded? Or without a connected load?
The correct way to measure the voltage at the receptacle is with a load connected to the circuit. Not just at idle but with music playing at a level you normally listen.
The more dynamic the music material the better for a true measurement.