146G

Overview

The Hammond Manufacturing 146G is an audio output transformer designed for chassis mounting in push-pull tube amplifier circuits. It features a primary impedance of 250 center-tapped ohms and a secondary impedance of 8 ohms. The unit operates within a frequency range of 150Hz to 15kHz with a response accuracy of ±1dB. Rated power handling capacity is 700mW. Physical dimensions are 1.630 inches long by 0.880 inches wide, with a maximum installation height of 0.810 inches. Primary DC resistance is 4.4 ohms, while secondary DC resistance is 700 milliohms. The component utilizes wire lead termination.

Feature Summary

• Engineered specifically for general-purpose and replacement applications in push-pull tube output stages
• Constructed as an economical open-type audio transformer for standard chassis integration
• Provides defined impedance matching between high-impedance primary and low-impedance secondary windings

Applications

• Push-pull tube audio output circuit implementation
• Replacement for legacy audio amplifier designs requiring specific impedance ratios
• Chassis-mounted audio signal coupling in vintage or restoration equipment

Procurement Notes

Verify the specific part number suffix against manufacturer documentation to confirm electrical characteristics, as variations may exist within the series. Ensure the required primary and secondary impedance values align with the target circuit design before procurement. Confirm that the chassis mounting style and physical footprint meet the enclosure constraints. Check current availability status through authorized distributors, as lead times may vary based on production schedules.

Selection Notes

Select this component when designing or repairing tube amplifiers requiring a 250CT:8 ohm transformation ratio. Consider the 700mW power rating to ensure it meets the signal level requirements of the application. Evaluate the physical dimensions to verify compatibility with the intended chassis space. Compare against other series members if different impedance ratios or power ratings are necessary for the specific audio stage configuration.

Part Context

This component belongs to the Hammond 146 series of audio transformers, which are widely recognized in the audio electronics industry for use in tube-based equipment. The series offers various impedance configurations to suit different amplifier topologies. Hammond Manufacturing produces these units as economical solutions for both new builds and repair scenarios involving classic audio hardware.

Replacement Considerations

• 146E