Energy Concepts Inc. (ECI) High Voltage Power Supply 20600 or 20620

Eldorado Model 1650 Frequency Counter Operation and Service Manual

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

Emona LAB-4 LAB4 4-in-1 Instrument - Manual

Emona LAB-4 LAB4 4-in-1 Instrument - Schematics - Circuit Diagram

This is the actual factory print for the ESI (Electroscientific Ind. or Tegam) 252 and 253 LCR meter.

This file contains the complete manual for the Gertsch FM3 Frequency Meter. Regards. Jerry W2JI

Global Specialties 1332A Regulated DC Power Supply

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....

Model MAX-1300 Frequency Counter Instruction Manual.  Mfg mid-80's to late 80's.

Goldstar OS-9060D Operation, Schematic, Circuit and Block Diagrams  72 pages Same as TENMA 72-5025 Oscilloscope.

Operation manual and schematic for Hitachi V-302F Oscilloscope.  30 pages.  Document scanned @ 150 dpi, schematic scanned @ 300 dpi.

User's manual for the Hitachi V202F/V203F 20MHz oscilloscopes

Monitor de Serviço de Radiocomunications

Here is the manual for the Jackson Audio Frequency Oscillator.Regards,JerryW2JI