On 10/7/11 11:16 AM, Eric Garner wrote:
fortunately, everything in the "lab"(basement) is on UPSs so in theory the input voltages to the equipment should be pretty constant and I was already planning on using a linear supply.
What kind of UPS? A static inverter? Most UPSes just feed the line through until it goes out of range, and then it switches (within 8-10 ms) to the output of the inverter.
And even when on inverter, the output voltage regulation isn't all that hot, unless you've got a special inverter. A 5-10% variation in voltage from an inverter/UPS wouldn't be surprising.. (why should they try to do better.. the goal is to keep the equipment on, not serve as a voltage regulator)
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