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Product Detailed Parameters
- Description：AUDIO XFMR 4KCT / 4 CHAS MNT
- Series：1750
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：4.076" L x 3.170" W (103.53mm x 80.52mm)
- Height - Seated (Max)：2.630" (66.80mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：31.11:1
- Impedance - Primary (Ohms)：4kCT
- Impedance - Secondary (Ohms)：4
- DC Resistance (DCR) - Primary：185Ohm
- DC Resistance (DCR) - Secondary：400mOhm
- Transformer Type：Push-Pull Audiophile, Ultra-Linear - Tube Output
- Frequency Range：70Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：35W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1750J is a tube application output transformer designed for guitar amplifiers. It features a primary impedance of 4,000 ohms center-tapped and a secondary impedance of 4 ohms. The unit supports a power rating of 40 watts and operates within a frequency range of 70 Hz to 15 kHz. It utilizes wire lead termination and is intended for chassis mounting.
Feature Summary
- Designed specifically for tube guitar amplifier output stages
- Supports push-pull tube configurations with center-tapped primary winding
- Provides high-power handling capability suitable for professional audio applications
Applications
- Guitar amplifier output stages
- Tube-based audio equipment construction
- Push-pull amplifier circuit integration
Procurement Notes
Verify the specific impedance configuration matches the target amplifier design requirements. Confirm that the 4-ohm secondary impedance aligns with the connected speaker load. Ensure the chassis mounting style and wire lead termination are compatible with the existing enclosure layout. Cross-reference the 40-watt power rating against the thermal management capabilities of the final assembly.
Selection Notes
Select this component when a 4,000-ohm center-tapped primary and 4-ohm secondary impedance are required for high-power tube output stages. Consider the physical dimensions and chassis mounting constraints during the design phase. Evaluate the frequency response characteristics to ensure they meet the specific tonal requirements of the audio application.
Part Context
This component belongs to the Hammond Manufacturing 1750 series of audio and signal transformers. The series includes various models tailored for different tube amplifier configurations, offering options for varying primary and secondary impedances. These transformers are engineered for durability and consistent performance in musical instrument amplification systems.
Replacement Considerations
The Hammond Manufacturing 1750E serves as a related model within the same product family. While both units share similar mounting styles and frequency ranges, the 1750E differs significantly in electrical specifications, featuring an 8,000-ohm center-tapped primary and an 8-ohm secondary impedance. Substitution requires careful verification of impedance matching to prevent damage to the amplifier tubes or speakers.
