Hammarlund Four 20 & Four 11 manual, reprint.

This is a digitally copied and enhanced manual for the Hammarlund Four 20 Transmitter and Four 11 Modulator.  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 28 pages.  Topics include:  introduction, design, operation, realignment procedure, antenna suggestions, maintenance, resistance measurements, voltage measurements, parts lists, and schematics.