This is a reprint of the complete manual for the
Hickok/Western Electric KS-15874-L2 Cardmatic Tube
Tester. It contains the complete operating instructions,
circuit theory and description, maintenance/troubleshooting
information, parts list, and schematic. Complete calibration
instructions are provided. This book describes the KS-15874 Electron Tube Tester and gives the methods for operating and maintaining the set.
This tube tester is for general Bell System use. It is capable of testing
practically all small sized, low power tubes of Western Electric Company or other manufacture. The set is semi-automatic in operation. Testing of tubes is done by selecting and inserting a punched card which automatically programs test conditions. This is in lieu of roll charts and manual selectors which were used on previous testers.
Dynamic tests are performed under conditions which are as close as possible to the operating condition of the tube rather than a common operating point as was formerly... More > done.< Less