Low Voltage on Circuit


Just tested the Voltage coming out of my wall and it was 112.7 V. This is obviously too low to feed my 120V tube monoblocs and my tubed pre amp. For about a week when I turned on my equipment it would shut off after about 30 seconds of play. I stumbled for a few days trying to isolate the problem but kept running in circles. I then took a trip to get a multimeter and tested the juice from the wall. Please let me know how to fix this, preferably with an inexpensive step up transformer or other solution that can be done DIY for under $100. My associated equipment all on the same circuit is:

Rogue Audio Magnum M120 Monoblocs (120Watts)
DIY pre amp using 2 6SN7 tubes
EAD Ultradisk 2000 CDP

buckingham
Buckingham, try measuring other outlets throughout the house. If they are all low, chances are that you will have to get the electric company in on this one. They may have a pole transformer that is going bad. It might be failing with the heavy load of air conditioners and 1.35 million fans running full tilt. If that is the case, running dedicated lines won't do a thing for you.

If the problem that you run into does fall into the hands of your local electric provider and they don't seem to be too eager to correct the problem, you can have what is called a "buck boost" transformer installed. These come in various voltages but the ones that i've seen were primarily rated for 12 volts. What this does is "stack" another 12 volts on top of the voltage that is already present on the line. This would take you up to almost 125 volts, which is a little high in my opinion. Then again, my voltage is pretty much rock solid at 123 volts and i've never had any problems. You may have to look around to see what is available in terms of buck boost transformers if this is the route that you have to go. Sean
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I've never suggested a PS Audio power plant but this may be the singular exception
Glen, with no load on the circuit there is 115V, with all the equipment powered on it is 112.7V dipping to 110V sometimes. If I owned my own place I would surely use dedicated 20 amp circuits for each Monobloc and 15 amp for the sources. I am currently renting a room for 4 months in a house that was built in the 1940's. I've tested the voltage on the other circuits and it's the same as this room. This only started happening this week because of the high A/C usage in the area, so I am guessing the voltage is low to start with at the street even before it gets into the house. I will try the extension cord idea tomorrow but I foresee similar results as the voltage is the same. This only needs a temporary fix as I will only be in this room for another month until I move back to Waterloo in a newer house in a newer neighbourhood with a good power grid. Any ideas?
Take a look at the ExactPower website for an interesting-looking solution that's not as monstrous as the big Power Plants, and won't add a transformer's resistance to the line. Never heard this product in action myself, though. Best of luck! :-(
OK, Now your talking, 115v is unexceptable. Call the power company and have them come out and take a reading. (This is free by the way) Tell them what your experiencing. Are the lights dimming or acting funny? You may need a new main service. If you have a cheep tester you may not be getting an acurate reading either.

If it is in fact 115v at the meter and you are not currently experiencing heat wave conditions, than they will take care of it. Most Power companies pride themselves at keeping the power right at 120/240. Or at least that is the case here in CA.