On Sun, 15 Feb 2004 16:44:48 -0500, Gary Coffman
wrote:

On 14 Feb 2004 17:30:09 -0600, Barry S. wrote:
Has anyone hooked up an oscilloscope to the AC outlets of an engine
driven welder? How clean is the output? Could you run a computer,
radio, television, or laser printer off it?

I have a Miller Bobcat. The scope says the output is as pure a sinewave
as I see from the utility company. That's to be expected since it is an
alternator, what else could it be? The frequency varies around a bit
(function of engine RPM), but only things like electric clocks and old
phonograph turntables care much about the frequency being precisely
60 Hz. Voltage regulation is pretty decent at light to moderate loads,
about +/- 5%. With a heavy switched load, I've seen voltage momentarily
drop as much as 15%. All of that is acceptable, and comparable to
what you'd get from the utility with a slightly undersized service drop.

How loud is the Bobcat? Too loud to sleep at night with it on?

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