>-----Original Message-----
>From Anthony Baldwin: "...the generous bandwidth of 
>national AM channels in the 1930s and '40s offered a far higher level 
>of AM fidelity than we're used to today..."
>
>Most younger people don't realize that the average AM station of the 1940s
>sounded far better than the average FM station of the '80s.
>
>Bob Olhsson Audio Mastery, Nashville TN
>Mastering, Audio for Picture, Mix Evaluation and Quality Control
>Over 40 years making people sound better than they ever imagined!
>615.385.8051 http://www.hyperback.com    http://www.thewombforums.com

It's not just available bandwidth, but also the current NRSC 
standards that require limited frequency response.  I remember 
signing on WHA many mornings back in the early seventies.  Before 
programming started we would run tones to determine if the 
transmission equipment needed attention.  If we could not hear at 
least 12 KHz coming back, we were to report it to the Chief Engineer 
for action.  Response better than that was frequently noted.

Bob Cham