ungvichian wrote:
So, I want to make a loop antenna for AM, and I'd like to ask a
question that I guess must have been asked time and time again: Does
the material used to make the wire (copper, steel, aluminum) affect the
inductance of the loop?

It affects the Q more than the inductance. Stainless
steel 75m mobile loading coils have been measured
to be 4+ dB down from a copper coil. If you want
a really efficient AM loop, use a super-conductor. :-)
--
73, Cecil http://www.w5dxp.com