For what it's worth, I have a 2008 Mac Pro, home-brewed Windows 7 box, a Lenovo T62p Thinkpad and a new 2010 Macbook Pro in my shack, and none have ever experienced any RFI related problems at any power level up to 1200 watts. This is with the antenna about 35 feet away. In fact, the only problem I've experienced has been noise coming through a pair of amplified speakers that weren't properly isolated.
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