I just now did some checking. My loudest noise on 20m is about s1. Turned the Magnetek converter on and off, furnace, roof air conditioners, water pump -- all pretty quiet to my surprise. Oh, yes -- water heater -- wait a sec -- yep, it's quiet too. Also the two little fans at the corners of the windshield, which I never use. Looks like (1) I got lucky, or (2) my radio doesn't hear well. But I hear WWV OK, and the little fan in the ceiling vent in the head is s7. Never use that, either.
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-- Carl
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