National HRO-500 manual, reprint.

This is a digitally copied and enhanced manual for the National HRO-500 receiver.  It has been copied from an original and is clear, clean, and easy to read.  It is printed on premium 24# paper with heavy covers and bound with a plastic comb.  No more struggling with unreadable photocopies!

It measures 8 1/2" X 11" with about 59 pages plus two large one piece 11" X 30" fold out schematics.  Topics include:  general description, operation, theory of operation, test and alignment, voltage chart, specifications, parts list, parts layout photos, and schematics.