KentTeffeteller
Gimpus Stereophilus!
AM - your stereo receiver is/has never been designed for AM performance. By the 70's, AM was already dying so the designers most likely skimped on the circuits.. And the ferrite bar used on many receivers was inferior to the loop designs of AM only units from prior decades...
FM - an out door directional antenna will make a world of difference in the number of stations received and will help eliminate multipath and co-channel interference. Both are a major problem with the crowded FM band today...
Load this FCC query and pick a single FM frequency and it will show you the actual number of translators, LPFM, and Class A,B,C, stations transmitting on that channel.
For example , here's the query for channel 300 (107.9 FM) There are way more than you probably imagined !!
Depends on the manufacturer on AM sections, the McIntosh MAC 1900 had one of the best AM sections audio wise. The Philips tuners and receivers in the USA built Laboratory Series were really fine too. Antenna systems important. Much of today's reception woes is too many stations too close together.