Superior TV-12 tube tester manual, reprint.

This is a digitally copied and enhanced manual for the Superior TV-12 tube tester.  It  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 manual is about 8 1/2" X 11" with a large one piece 11" X 17" fold out schematic.  Topics include:  test for shorts and leakages, test for quality, test for filament continuity, example of a typical test, schematic, determining mutual conductance,  and testing transistors.