Thank you all for your responses.
No flourescent lights in the house...all other components in the room have been unplugged. I still get buzzing and general white noise - you know, all that background garbage that comes in with an AM signal.
I have 2 of the CC Crane Twin Coil FerriteŽ AM Antennas. They are of no help. They don't work on my 2 Bose systems, also. I called CC Crane and they have special instructions for the Bose systems. Following their advice, the Twin Coil set-up is useless. 'Nuff said on that.
This current set-up is an older Sony Micro Component System, model HCD-NE3 - see photo. My guess is the tuning section is not inferior to most basic radios. I also have a Blaupunkt Derby Deluxe and a Grundig Satellit 700...I'd like to match as closely as possible the AM reception they render.
I'll look at CC Cranes "Tips" pages.
Thank you again.
Regards,
Becca
PS Suburban neighborhood - no tall buildings from which one could leap.