A-66J

Audio Transformers Overview

The Triad Magnetics A-66J is a chassis-mount audio transformer designed for impedance matching applications. It features a primary impedance of 15,000 Ohms and offers secondary impedance options of 600, 250, or 50 Ohms, providing a 5:1 transformation ratio. The unit has a power rating of 100 mW and a primary DC resistance of approximately 1.74 kOhms. It supports a frequency response range from 40 Hz to 15 kHz, making it suitable for high-fidelity plate-to-line connections in audio systems.

Audio Transformers Feature Summary

• Designed for impedance matching between high-impedance plates and low-impedance lines
• Chassis mount construction for secure installation
• Multi-tap secondary winding configuration for flexible line matching

Audio Transformers Applications

• Plate-to-line audio transformer connections
• High-fidelity audio signal transmission
• Impedance matching in broadcast audio equipment

Audio Transformers Procurement Notes

Verify the specific secondary impedance variant required (600, 250, or 50 Ohms) as the part number may denote the series rather than the exact tap configuration. Confirm chassis mounting dimensions against your enclosure specifications. Ensure the 100 mW power rating meets the signal level requirements of your application to prevent saturation or distortion.

Audio Transformers Selection Notes

Select this component when a 15k primary impedance is necessary to match tube amplifier outputs. The wide frequency response up to 15 kHz ensures adequate bandwidth for audio signals. Consider the physical size constraints for chassis mounting and verify that the termination style matches your wiring infrastructure.

Audio Transformers Part Context

This component belongs to the Triad Magnetics J Series, which focuses on economy construction while maintaining performance standards. The series allows amplifiers to exceed broadcast requirements through flexible winding configurations. It serves as a specialized solution for legacy or specific high-impedance audio interface needs.

Audio Transformers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before attempting substitution.