The Tektronix 120 designation encompasses a family of power transformers engineered for vintage Tektronix oscilloscopes and tube-based test equipment. These custom-designed transformers deliver multiple output windings configured for primary, heater, and high-voltage plate supplies. Each transformer is built to precise specifications documented in detailed construction and schematic drawings, making them suitable for restoration and service applications in classic Tektronix instruments.
Technical Specifications
Primary Windings: Configurable for 120V or 240V operation via series/parallel connection, 50/60 Hz.
Heater Windings: Available in 6.3V outputs with current ratings ranging from 0.6 A to 8.0 A. High-voltage insulated variants support CRT filament requirements.
High-Voltage Plate Outputs: Multiple secondary windings deliver AC voltages including 110V, 130V, 150V, 157V, 190V, 19 CT, 200V, 234V, 235V, 270V, 300V, 350 CT, 440 CT, and 800 CT configurations. Current ratings span 100 mA to 382 mA across various windings.
Turns Ratio: Select models feature 1:20 ratio configurations.
Physical: Weight up to 15 pounds; terminal pinouts are model-specific.
– Key Features
• Multi-tap primary windings for universal mains input flexibility
• Isolated heater circuits with variable current capacity
• Multiple secondary outputs for plate, bias, and auxiliary supplies
• Documented construction specifications for every model variant
• Heavy-duty core-and-coil design rated for continuous duty operation
– Typical Applications
• Power supply modules in Tektronix oscilloscopes and measurement instruments
• Tube-based audio and RF test equipment restoration
• Laboratory power conditioning for vintage electronic test systems
– Compatibility & Integration
Terminal connections and winding configurations are specific to each 120-series transformer model. Detailed specification drawings and instruction manuals provide pinout information and electrical characteristics required for proper integration into target instruments.
