Tektronix 7A26 Dual Trace Amplifier Instruction Manual w/ Schematics Rev B 1975

Tektronix 7A26 Dual Trace Amplifier Instruction Manual w/ Schematics Rev B 1975

This is the original printed Instruction Manual for the Tektronix 7A26 Dual Trace Amplifier plug-in module, Revision B, dated July 1975. It covers operating instructions, full specifications, theory of operation, maintenance, calibration procedures, an electrical parts list, circuit board illustrations, and mechanical parts information — everything needed to operate, service, and calibrate the 7A26.

Specifications & What's Included

• Manufacturer: Tektronix
• For: Tektronix 7A26 Dual Trace Amplifier
• Document type: Instruction Manual
• Revision: Rev B
• Publication date: July 1975
• Format: Original printed hardcopy, comb-bound with blue cover
• Language: English
• Sections: 8 total
• Section 1: Operating Instructions (7A26 features, operating information, controls & connectors, basic applications)
• Section 2: Specifications (electrical characteristics, environmental characteristics, physical characteristics)
• Section 3: Theory of Operation (introduction, block diagram, detailed circuit description)
• Section 4: Maintenance (preventive maintenance, troubleshooting, corrective maintenance, troubleshooting chart)
• Section 5: Calibration (performance check, test equipment required, calibration procedure, index to calibration procedure)
• Section 6: Electrical Parts List (parts ordering information, abbreviations and symbols)
• Section 7: Diagrams and Circuit Board Illustrations (symbols, reference designators, fold-out schematics)
• Section 8: Mechanical Parts List (mechanical parts information, index, mechanical parts illustrations)
• Includes fold-out block diagram, CH1 & CH2 attenuator schematics, and display switching/output schematics

Applications

The Tektronix 7A26 is a dual-trace vertical amplifier plug-in designed for use in Tektronix 7000-series oscilloscope mainframes, including instruments like the 7704, 7603, 7904, and others in the 7000 family. Introduced in the early 1970s, the 7A26 provides two independent 200 MHz bandwidth channels and remains one of the most widely used plug-ins from the Tektronix 7000 platform — a modular system that defined precision analog oscilloscope measurement through the 1970s and 1980s. This instruction manual is the primary reference for anyone maintaining, calibrating, or repairing a 7A26, and is sought after by vintage test equipment collectors, electronics technicians, and engineers who still use 7000-series scopes in the lab. The manual's detailed schematics and calibration procedures are particularly valuable for service work, since original factory documentation for this era of Tektronix equipment is increasingly difficult to find in printed form.