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post #4 of (permalink) Old 02-29-2016, 12:36 AM
Planted Tank Guru
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,015
Doesn't pulse width power control work by chopping the tail end off of each sine wave, so you get a sine wave start, followed by an abrupt drop to zero? That would show up as a weird wave shape, with the length of the off time being what determines how much the power is reduced.

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