>
> I wonder if we shouldn't drop the acceptable levels 10dB or so.
> Those regs were written when the average person might have one or two par=
t
> 15 devices.
> I can usually get down to where they system is below the noise floor of
> the
> test house SA without any trouble.
>

I'm impressed that you can get stuff that quiet! The class B (residential)
limit is about 10dB below the class A (non-residential) limit. I can
normally meet class A pretty well, but B is tough! The FCC limits for
conducted emissions (back down the power line) are from 150kHz to 30MHz (
http://www.hallikainen.com/FccRules/2015/15/107/ ). Radiated limits are
above 30MHz (http://www.hallikainen.com/FccRules/2015/15/109/ ). There
always seems to be some harmonic way up there.

Unintentional radiator noise has pretty much destroyed AM broadcast. The
higher frequencies get noise, but not as much.

Harold


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