Hi Guys For you am stereo and tv stereo buff, Here is a book you might like to find and check and read it’s called.
AM STEREO & TV STEREO NEW SOUND DIMENSIONS BY STAN PRENTISS
1985 PRINT BY TAB BOOKS INC. BLUE RIDGE SUMMIT, PA 17214
ISBN 0-8306-0932-6
ISBN 0-8306-1932-1 ( PAPER BACK )
Very good book i have it good luck happy reading jeff