148E

Overview

The Hammond Manufacturing 148E is an open-frame audio transformer designed for printed circuit board (PCB) mounting. It functions as a driver transformer with a primary impedance of 500 ohms and dual secondary impedances of 125 ohms and 500 ohms. The unit features a primary coil resistance of 79 ohms and secondary coil resistances of 60 ohms. It is unshielded, weighs 22.680 grams, and belongs to the 148 series.

Feature Summary

• Open-frame construction suitable for direct PCB integration
• Dual secondary winding configuration providing flexible impedance matching options
• Driver application design optimized for audio signal transmission

Applications

• Audio signal coupling in electronic circuits
• Impedance matching between audio stages
• Driver transformer applications in audio equipment

Procurement Notes

Verify the specific impedance configuration required for your circuit design, as this model offers dual secondary options. Confirm that the open-frame, unshielded form factor aligns with your electromagnetic interference requirements and mechanical space constraints. Ensure compatibility with standard PCB mounting techniques before finalizing procurement.

Selection Notes

Select this component when a dedicated audio driver transformer with specific 500-ohm primary and selectable secondary impedances is needed. Consider the unshielded nature if isolation from external magnetic fields is not critical. Evaluate the physical dimensions and weight against available board space and structural support needs within the assembly.

Part Context

This part belongs to the Hammond Manufacturing 148 series of audio transformers. These components are specialized for signal transformation tasks rather than power distribution. The series focuses on providing reliable audio frequency performance through standardized impedance ratios for various embedded audio applications.

Replacement Considerations

No public confirmed substitute part numbers are documented.