1750E

Overview

The Hammond Manufacturing 1750E is a tube application audio output transformer designed for push-pull configurations. It features an 8,500-ohm center-tapped primary impedance and an 8-ohm secondary impedance, providing a turns ratio of 32.61:1. The unit supports a power rating of 15 watts with a frequency range of 70 Hz to 15 kHz. Constructed with wire lead terminations, it utilizes an unshielded chassis mount design measuring 3.25 inches in length, 2.085 inches in width, and 1.995 inches in height.

Feature Summary

• Designed specifically for tube output push-pull applications
• Features a center-tapped primary winding configuration
• Provides precise impedance matching between high-impedance tubes and low-impedance speakers
• Constructed with wire leads for direct circuit integration

Applications

• Guitar amplifier output stages
• Hi-fi tube amplifier construction
• Push-pull audio signal transmission
• Vintage audio equipment restoration

Procurement Notes

Verify the specific impedance requirement matches the vacuum tube plate-to-plate load before purchase. Confirm that the chassis mounting dimensions fit the target enclosure space. Ensure the wire lead termination style aligns with the existing circuit board or point-to-point wiring layout. Check for any regional shipping restrictions due to component weight.

Selection Notes

Select this model when a 15-watt capacity and 8kCT primary impedance are required for push-pull tube circuits. Consider the physical dimensions if space constraints exist within the amplifier chassis. Compare against other series members like the 1750B or 1750Y if different power ratings or impedance values better suit the specific tube pair being utilized.

Part Context

This component belongs to the Hammond 1750 series of audio transformers, which are widely recognized in the tube amplifier industry. The series offers various impedance options to match different vacuum tube types. The 1750E specifically targets applications requiring an 8kCT primary, distinguishing it from lower impedance variants within the same product family.

Replacement Considerations

Direct substitutes include the Hammond 1750B (5.482kCT) and 1750Y (6.2kCT) if impedance differences are acceptable. Other manufacturers may offer equivalent specifications, but verify that the core material and frequency response characteristics remain compatible with the original circuit design.