Precision 10-20 and 10-22 tube tester manual
with tube test data, reprint.

This is a digitally copied and enhanced manual for the Precision models 10-20 and 10-22 tube tester.  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 a total of about 88 pages. Topics include:  condensed operating instructions, introduction and summary, functions and description of controls, operating instructions, ballast information, qualitative paper condenser tests, battery testing instructions, service data, tube test data, and schematic.

Included is tube test data MRC 10-12-67 for use with roll chart MRC F2B.