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House AC Line Variance

A question about AC...

My measured AC line voltage runs from 123 to 130 VAC. Lowest in the evening and highest in the morning. I assume this is due to load in the neighborhood. It really affects the bias on my tube integrated.

So is this a normal range (seems high) and is that big of fluctuation?

Is this something that can be "controlled" at the house or is this the power company?

Thanks for any info.
benb
porziob
316 posts
 
W/ most utilities, +/- 10% is the std. Over or under, they must fix the problem. You`re w/in their tolerance. They won`t much care about the effect on your bias.
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shadorne
7,467 posts
 
This is quite normal. If you are concerned or you hear audible differences then I'd suggest the APC H15.
fatparrot
1,314 posts
 
Porziob, I disagree! The standard is 120v +/-5% [114v to 126v]. Just checked mine at 7:30 PM [TV & A/C running] and it's 122v...but we have a recently upgraded power grid in my area.
jeff_jones
418 posts
 
Sola voltage regulators are very well built and priced for industry instead of audiophile silly, I've installed a lot of them over a lot of years. A quick internet search or a call to your local electrical supply house should get you some info. Monster makes a voltage regulator that should do the trick also.
davidbigeye
28 posts
 
I have 240V AC and it varies between 220 and 255!
I bought a Thor PS10 power station and that unit shows input AC voltatage and output AC voltage on it's display. Now no matter what the input voltage, it always provides a stable 240V output. This has done the trick for me, and given me piece of mind too...maybe you could consider a similar solution.
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