140QEX

Overview

The Hammond Manufacturing 140QEX is a studio-grade audio transformer designed for impedance matching applications. It features a 600CT primary to 600CT secondary configuration, ensuring balanced signal transmission. The device operates within a frequency range of 20Hz to 20kHz and supports a power rating of 150mW at ±1.5dB from 300Hz to 50kHz. Constructed with metal can housing, it provides effective shielding against electromagnetic interference. The unit utilizes epoxy potting within a molded case for durability and employs pin-type PC board mount with a minimum pin length of 0.187 inches.

Feature Summary

• Studio-grade impedance matching capability for professional audio signals
• Metal can construction providing excellent electromagnetic shielding
• Epoxy potted in a molded case for structural integrity
• Pin-type PC board mount design for secure installation

Applications

• Professional audio equipment signal balancing
• Impedance matching between audio stages
• Studio-grade audio interface circuits
• Balanced line driver and receiver implementations

Procurement Notes

Verify the specific ordering suffix and mounting configuration against the official datasheet before purchase. Confirm that the pin length meets the minimum requirement of 0.187 inches for the target PCB layout. Ensure the application environment is compatible with the epoxy potting and metal can construction. Cross-reference the manufacturer's latest documentation to confirm current compliance status and physical dimensions.

Selection Notes

Select this component when precise 600-ohm impedance matching is required for balanced audio lines. The 20Hz to 20kHz frequency response suits standard audio bandwidth needs. Consider the chassis or panel mount requirements if external housing is needed, as this is an internal transformer element. Evaluate the 150mW power handling against the system's signal levels to ensure adequate headroom without distortion.

Part Context

This part belongs to Hammond Manufacturing's 140Q series of audio transformers. It serves as a specialized component for maintaining signal integrity in balanced audio systems. The 140QEX variant specifically denotes the stereo or dual-channel configuration often used in multi-channel audio processing units. It complements other Hammond audio components by providing reliable isolation and impedance transformation.

Replacement Considerations

Consult the official Hammond Manufacturing documentation for direct cross-references. Verify electrical equivalence regarding impedance ratios and frequency response. Ensure mechanical compatibility with existing mounting structures. Check for any updates in the product line that may supersede this specific model number.