ServiceScope was a Tektronix publication for users of Tektronix oscilloscopes. It had a feature story, service notes, updates and modifications, and used oscilloscopes for sale. Click on the images to view the PDFs.
February 1964 Current Measuring Techniques
June 1964 Frequency Comparisons Using Roulette Patterns
August 1964 The Cathode Follower
December 1964 Simplifying Transistor Linear-Amplifier Analysis
February 1965 Some Basic Sampling Concepts Reviewed
April 1965 Getting Acquainted With Spectrum Analyzers. This issue has some amazing artwork and cartoons.
October 1965 Introduction To Oscilloscope Differential Amplifiers
February 1966 Field Effect Transistors
April 1966 The Storage Oscilloscope
August 1966 Tunnel Diode Switching Circuits and the Back Diode
October 1966 Understanding And Using Thevenin's Theorem
February 1966 A Practical Approach To Transistor and Vacuum Tube Amplifiers