Hallicrafters HA-4 manual, reprint.

This is a digitally copied and enhanced manual for the Hallicrafters HA-4 keyer.  It  is clear, clean, and easy to read.  It is printed on premium 24# paper with heavy covers and stapled in the fold just like the original.  No more struggling with unreadable photocopies!

The HA-4 manual is about 5 1/2" X 8 1/2" and consists of about 15 pages plus a separate 11" X 14" enlargement of the schematic.  Topics include introduction, installation, function of operating controls, operation, service data, and parts list.