THIS IS A SCHEMATIC AND PICTURES  FOR A 1951 ELECTRO MODEL "S" BATTERY ELIMINATOR.

THIS IS AN OPERATOR'S MANUAL INCLUDING SCHEMATIC FOR A SIMPSON 383A IN CIRCUIT CAPACITOR TESTER

This is a group of retyped schematics as well as enhanced original documents for comparison.

THIS MANUAL INCLUDES INSTRUCTIONS, TUBE DATA AND TEST AND CALIBRATION INFO.

This is the tube data (1970) for the Mercury model 204 drugstore tube tester. I'm told it can also be used for the model 202 and 201.

Simpson 330 Tube Tester Manual and Tube Data, schematic with transformer tap voltages.

Simpson 330 Tube Tester Calibration

Manual for Precision 10-60 Tube Tester

This is a .pdf of a Paco G-30 RF Signal Generator taken at 5 megapixels

These are the manuals that came with a test kit I purchased recently. The kit dates from the 1980's and was obviously at the low end of the market....