148Q

Overview

The Hammond Manufacturing 148Q is an open-frame audio signal transformer designed for printed circuit board mounting. It features a single-channel configuration with through-hole termination. The primary coil impedance is specified at 10,000 ohms, while the secondary coil offers dual impedances of 2,000 ohms and 500/500 ohms. The device operates within a frequency range of 200 Hz to 15 kHz. This component serves as a driver transformer in audio applications requiring specific impedance matching.

Feature Summary

• Open-frame construction suitable for direct PCB integration
• Dual secondary impedance options for flexible circuit design
• Through-hole pin terminal connection method

Applications

• Audio signal level transformation
• Driver stage coupling in amplifier circuits
• Impedance matching between audio stages

Procurement Notes

Verify the exact secondary impedance configuration required for your design, as the 148Q variant specifies 2k and 500/500 ohm options. Confirm that the 10k primary impedance aligns with your source circuit requirements. Ensure the through-hole footprint matches your PCB layout constraints before finalizing the order.

Selection Notes

Select this component when a 10k primary to 2k or 500-ohm secondary ratio is necessary for audio driver applications. Consider the 200 Hz to 15 kHz bandwidth limitation against your signal requirements. The open-frame design requires careful mechanical placement on the PCB to avoid interference with adjacent components.

Part Context

This part belongs to the Hammond 148 series of audio transformers. It is categorized under audio and signal transformers, distinct from power transformers or RF components. The series focuses on providing reliable impedance transformation for low-frequency audio signals in consumer and professional equipment.

Replacement Considerations

No public substitute part numbers are confirmed for this specific model.