EICO 666 Tube Tester manual w/test data sets reprint.

This is a digitally copied and enhanced manual for the EICO 666 dynamic conductance tube and transistor 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!

The manual measures 8 1/2" X 11" with about 75 pages.  Topics Include:  general description, specifications, functions of controls, operating instructions, circuit description, maintenance, special applications, service, parts list, and schematic.  It also contains the unmarked construction instructions, operating instructions for the EICO 610A tube tester adapter with parts list and schematic, and the following test data:

  • 75/76  Note: a few areas of this one are faint and difficult to read.

  • supplement 666-016

  • supplement 666-03

  • 666-03 correction

  • Roll chart supplement for mod 625 and 666

  • transistor test data - TR-1