Loop antennas are best for AM most the time. Search for
" AM loop antenna" for some new ones & easy DIY projects.
Probably best to get or make a passive one.The biggest
problem with AM is interference. It can come from almost
anything now AC or battery. Getting rid of it is all but
impossible unless you are in a major black out.
Long wires are fun if you are in the sticks. I had one going
out in my back yard abt 1/4 mile & could get Miami & the
US VI almost any nite from N.H. very listenable.
73 Zeno
LFOD !