1750X

Overview

The Hammond Manufacturing 1750X is an audio and signal transformer designed for tube application power transformers, specifically tailored for guitar amplifier output stages. It features a single channel configuration with wire lead termination. The primary coil impedance is rated at 1700 ohms, while the secondary side offers multiple impedance options of 4, 8, and 16 ohms to accommodate various speaker configurations. The unit has a power rating of 100 watts and operates within a frequency range of 70 Hz to 15 kHz. This component belongs to the 1750 series and is classified under audio & signal transformers.

Feature Summary

• Designed for high-power tube output applications in guitar amplifiers
• Provides versatile secondary impedance matching for different speaker loads
• Utilizes wire lead termination for straightforward integration

Applications

• Guitar amplifier output stage construction
• Tube-based audio equipment repair and restoration
• Custom high-fidelity audio transformer assemblies

Procurement Notes

Verify the specific secondary impedance requirement (4, 8, or 16 ohms) against the target amplifier circuit design before ordering. Confirm that the 1700-ohm primary impedance matches the vacuum tube plate-to-plate load requirements. Ensure physical dimensions and wire lead lengths are compatible with the chassis layout. Check for RoHS compliance status if environmental regulations apply to the manufacturing process.

Selection Notes

Select this model when a 100-watt power handling capacity is required for push-pull or single-ended tube circuits. Choose based on the need for a single primary winding with multiple secondary tap options to simplify inventory. Consider the 70 Hz to 15 kHz frequency response as suitable for standard musical instrument amplification needs rather than full-range studio monitoring.

Part Context

The 1750X is part of Hammond’s 1750 series of audio transformers, which are widely recognized in the vintage and modern guitar amp building community. Unlike lower-power variants such as the 1750B (10W), the 1750X supports significantly higher power levels. It serves as a critical interface between vacuum tubes and loudspeakers, ensuring proper impedance transformation and signal fidelity in high-output audio systems.

Replacement Considerations

No direct public substitute part numbers are confirmed in the provided documentation. Users should verify compatibility with existing circuit designs when considering alternative brands.