1640SEA

Overview

The Hammond Manufacturing 1640SEA is a single-ended tube output transformer designed for high-fidelity audio applications. It features a primary impedance of 1250 ohms and supports secondary impedances of 4, 8, and 16 ohms. The unit handles a power rating of 30W with a maximum DC current of 200mA. It operates within a frequency range of 20Hz to 20kHz and includes an inductance of 14H. The physical dimensions are 125.5mm x 95.3mm x 115.8mm.

Feature Summary

• Enclosed and shielded construction to minimize electromagnetic interference
• Four-slot design optimized for triode, tetrode, or pentode tube circuits
• Over-designed architecture intended for Class-A operation

Applications

• High-fidelity single-ended audio amplifier circuits
• Class-A tube output stages
• Audio equipment utilizing triode, tetrode, or pentode tubes

Procurement Notes

Verify the specific secondary impedance configuration required for your circuit design, as the model supports multiple tap options. Confirm that the 200mA DC current limit aligns with your tube's operating parameters. Ensure the enclosure dimensions fit within your chassis layout before finalizing the order.

Selection Notes

Select this component when designing single-ended tube amplifiers requiring a 1250-ohm primary impedance. It is suitable for applications demanding high fidelity and shielding against external noise. Consider the physical size constraints and the need for a shielded, enclosed transformer in your assembly process.

Part Context

This part belongs to Hammond Manufacturing's line of audio transformers, specifically engineered for vacuum tube audio electronics. It serves as a critical coupling component between the output tube and the speaker load, ensuring accurate signal transfer across the audible spectrum.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.