While either a UPS or voltage regulating transformer could probably do the job for you, they might be overkill for the type of problem you've described. Furthermore, some generate harmonics that can cause audible interference. There's a simple solution that will work if we're truly talking about a brownout condition of 15-20 volts below normal line and not more-significant line drops.

You might consider getting a variable-voltage autotransformer ("Variac", although that's actually a specific brand). A typical one's output can be adjusted from zero VAC up to about 15% over the input voltage. That would mean with 100 VAC in, you could obtain 115 VAC out. Many are metered; some come with built-in voltmeters, some with ammeters, some have both (if unmetered, plugging in a meter is not a big deal). They're available in a variety of current/power ratings, so a quick calculation of what your equipment draws plus a small margin should allow you to determine the necessary capacity. I've seen 10-amp units selling new for $70 or so.

The drawback to a Variac is of course that the output adjustment is manual. For the situation you described, Gary, a one-time adjustment would have probably gotten you through the session. A concern might be that if the line voltage increased to "normal" while you were playing, you might not be able to rapidly adjust the voltage back down. However, if you've only increased it 10-15% or so, it's really unlikely that any modern equipment couldn't sustain that small percentage of overvoltage should the line indeed have returned to 120 VAC.

Just a thought.

--Barry


[This message has been edited by quietDIN (edited 08-19-2006).]