FM Stereo Multiplexing,5 books,Feldman,Crowhurst,All Nice Condition

Description

Here is a great collection of books on FM,from it's beginning of stereo in the early 1960's to the 1970's.Books are
1)FM Stereo Multiplexing by Norman H. Crowhurst,Oct 1961,Excellent condtion,cover and pages
2)FM Multiplexing for Stereo by Leonard Feldman,3rd Ed,1972,Excellent condition,with minor cover wear,pages great
3)FM Multiplexing for Stereo by Leonard Feldman,2nd Ed,1967,Cover shows wear and corner missing,pages fine
4)FM Multiplexing for Stereo by Leonard Feldman,1st Ed,1962,Excellent condtion,minor cover wear and pages fine
5)FM From Antenna to Audio by Leonard Feldman,1st Ed,1969,Cover minor wear,pages fine.
So,you have a great collection of FM technology from the beginning of FM stereo.The schematics  and circuit descriptions differ for the different editions of the Leonard Feldman books.I mean,he wouldn't have written 3 editions if they weren't updated as FM technology advanced over the years.