More goings-on... Sat Dec 4 8 AM both stations were back to former "full skirts" bandwidths.
670's whoosh hitting the Espanol in Miwaukee on 640 and hissing even nigh unto the audio sidebands of WGN on 720!
There's not a chance in H E double toothpicks that WLW could be heard through it, so thats a huge difference suddenly.
780's whoosh reaching into the upper audio of WNDZ 750, and extending up to , and into the sidebands of whatever they
call 820 these days.
Checking other adjacent responses WTMJ/WMT etc, found these all unchanged, so the radio's not crazy.
Slept all day so no idea what went on....
Then tonight Sat 10 PM on the way to work, they both seem back to be back in sharp and narrow mode.
There must some testing going on. I really must dig out that Accurian tomorrow. Hope I can find the power supply
as I have been using it for various temporary functions.