Collins 51J-4 manual, reprint.

This is a digitally copied and enhanced manual for the Collins 51J-4 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!

The Collins 51J-4 manual  measures 8 1/2" X 11" with about 78 pages plus a large one piece 11" X 19" fold out schematic.  Topics Include:  general description, installation, adjustment and operation, circuit description, maintenance, voltage and resistance table, parts list, diagrams, and schematic.  Dated 15 August 1954 and second edition 30 September 1955