145J

Overview

The Hammond Manufacturing 145J is an audio chassis mount transformer designed for signal coupling and impedance matching in audio circuits. It features a primary impedance of 4,000 Ohms and a secondary impedance of 600 Ohms with a center tap (CT). The component operates within a frequency range of 150 Hz to 15 kHz. It utilizes a chassis mounting style for secure installation within equipment enclosures.

Feature Summary

• Provides electrical isolation between circuit stages
• Matches high-impedance sources to low-impedance loads
• Supports balanced audio signal transmission

Applications

• Audio amplifier input/output stages
• Impedance bridging in professional audio systems
• Signal coupling in vintage or restoration audio equipment

Procurement Notes

Verify the specific pinout configuration and mounting hole dimensions against your chassis design before ordering. Confirm that the operating frequency range meets your application requirements. Ensure the chassis mounting style is compatible with your assembly process. Check for any RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this transformer when a 4k:600 ohm ratio is required for audio applications. Consider the physical size constraints for chassis mounting. Evaluate the frequency response limits for your specific audio bandwidth needs. Compare alternative transformers if different impedance ratios or mounting styles are necessary for the system design.

Part Context

This component belongs to Hammond Manufacturing's line of audio transformers. These components are typically used in analog audio signal processing chains. They serve as critical interface elements between different stages of audio equipment, ensuring proper signal transfer and noise reduction through galvanic isolation.