844

Overview

The Hammond Manufacturing 844 is a broadcast-quality audio transformer designed for plate-to-line applications. It operates within a frequency range of 50 Hz to 15 kHz. The unit features primary coil impedances of 10 kohms and 40 kohms, with secondary coil impedances of 125 ohms and 500 ohms. Physical dimensions are 44.5 mm in length, 31.8 mm in width, and 65 mm in height. The component weighs 272.155 g and includes shielding.

Feature Summary

• Broadcast-grade audio signal transformation capability
• Shielded construction for interference reduction
• Plate-to-line circuit configuration

Applications

• Professional audio broadcasting systems
• Signal isolation in audio circuits
• Impedance matching between tube plates and transmission lines

Procurement Notes

Verify the specific impedance variant required (10k/40k primary, 125/500 ohm secondary) against system schematics. Confirm RoHS compliance status through official documentation. Ensure physical mounting space accommodates the specified dimensions and weight. Cross-reference manufacturer part numbers to avoid confusion with similar series components.

Selection Notes

Select this model when broadcast fidelity and shielding are critical requirements. Evaluate primary and secondary impedance values to ensure compatibility with source and load circuits. Consider the sealed construction for environmental protection. Verify that the frequency response meets the specific audio bandwidth needs of the application.

Part Context

This component belongs to the Hammond 800 Series, which specializes in high-performance audio transformers. The series is known for meeting rigorous broadcast standards. The 844 specifically addresses plate-to-line conversion needs in professional audio environments, distinguishing it from general-purpose signal transformers.

Replacement Considerations

Consult official Hammond Manufacturing documentation for verified substitute part numbers. Do not assume cross-compatibility with other series without explicit manufacturer confirmation. Verify electrical parameters match exactly before substitution.