I do use a couple old Delco car radios from the 1990's they have very good AM reception some after market radios do not .
For a 1980's receiver / stereo in my workshop with separate am/fm antenna connections I ran a wire antenna in my garage attic . The wire was unwound from a old electric motor and coated I lost track of how long it got as I wound it walking over the joists several times . It worked great with one issue a ham operator three miles away would come in when he talked on Single Side Band . The length of an antenna makes a difference in reception by the frequency and I was demodulating a higher frequency then my tuner would normally get with that length of wire. After a thunderstorm I lost all AM reception on the radio First thing I did was check the antenna it was severed at the point I had in soldered to the shielded cable running to receiver and the AM circuits are damaged in the receiver . The receiver was off at the time of the damage and I still have FM available that storm hit in 2012 and the antenna wire was fully inside the garage attic under a asphalt shingle roof .
P.S. to earlier post my front porch bug light giving off am static died , taking it apart revealed several places the circuit board had arc marks and some parts blown out .