I found a serious noise source I had not thought of. It may be well known, but I've never seen it mentioned.
I have a digital recorder with a rechargeable battery that I use with my receiver. When the battery is charging, especially near the end of the charge cycle, it emits a horrible racket much like light dimmers. I can operate the recorder from the AC adapter, but have to be sure to disconnect it when the battery isn't fully charged.
I would suppose other rechargeable devices could produce the same problem for radio reception.
Hope this helps someone else avoid this problem.
W. Curt Deegan
Boca Raton, (South East) Florida
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