I agree that shorting plugs on all of the unused inputs (especially of course the phono input, but I'd suggest the others as well) should be step 1.
I doubt that the speaker cables have anything to do with it, in part because the very low output impedance of the amplifier would tend to "short out" any rfi/emi picked up there. And also because it would seem unlikely that anything picked up there would make it back to a circuit point near the input of the preamp section, where it could be amplified.
I'd suggest one other experiment that I'm curious about. Do you get the same radio signal pickup when NOTHING is connected to the inputs of the 2010S (meaning with the cdp disconnected)? (Obviously, turn power off while you are disconnecting the cable).
Regards,
-- Al
I doubt that the speaker cables have anything to do with it, in part because the very low output impedance of the amplifier would tend to "short out" any rfi/emi picked up there. And also because it would seem unlikely that anything picked up there would make it back to a circuit point near the input of the preamp section, where it could be amplified.
I'd suggest one other experiment that I'm curious about. Do you get the same radio signal pickup when NOTHING is connected to the inputs of the 2010S (meaning with the cdp disconnected)? (Obviously, turn power off while you are disconnecting the cable).
Regards,
-- Al