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Product Detailed Parameters
- Description：XFMR 1.7KCT / 4, 8, 16 CHAS MNT
- Series：1750
- Mfr：Hammond Manufacturing
- Package：Box
- Mounting Type：Chassis Mount
- Size / Dimension：3.750" L x 4.020" W (95.25mm x 102.11mm)
- Height - Seated (Max)：4.600" (116.84mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：10.40:1
- Impedance - Primary (Ohms)：1.7kCT
- Impedance - Secondary (Ohms)：4, 8, 16
- DC Resistance (DCR) - Primary：15.36Ohm, 16.56Ohm
- DC Resistance (DCR) - Secondary：100mOhm, 120mOhm
- Transformer Type：Push-Pull Audiophile, Ultra-Linear - Tube Output
- Frequency Range：50Hz ~ 12kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：100W
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1750U is a push-pull tube audio output transformer designed for high-power guitar amplifier applications. It features a primary impedance of 1,700 ohms center-tapped and offers secondary impedances of 4, 8, and 16 ohms. The unit has a power rating of 100W and utilizes wire lead termination. It weighs approximately 3.63 kg (8 lbs) and is intended for general-purpose use in tube output circuits.
Feature Summary
- Designed specifically for push-pull tube output circuits in guitar amplifiers
- Provides multiple secondary impedance options including 4, 8, and 16 ohms
- Supports high-power operation with a 100W rating
- Features wire lead termination for direct circuit integration
Applications
- Guitar amplifier output stages
- Push-pull tube audio circuits
- High-power audio signal transformation
Procurement Notes
Verify the specific impedance configuration required for your amplifier design, as this model supports multiple secondary taps. Confirm that the 100W power rating aligns with your tube pair capabilities. Ensure physical mounting space accommodates the substantial weight and dimensions of the unit. Cross-reference the primary impedance to match your output tubes correctly.
Selection Notes
Select this component when designing or repairing high-power tube guitar amplifiers requiring a robust output transformer. The 1,700-ohm primary impedance suits specific tube types commonly used in JMP and JCM series amplifiers. Consider the multi-tap secondary for flexibility in speaker matching. Verify compatibility with existing chassis mounting points due to the heavy construction.
Part Context
This part belongs to the Hammond 1750 series of audio transformers, which are widely recognized in the guitar amplifier industry. The series includes various models differentiated by primary impedance and power handling. The 1750U represents the high-power variant within this lineup, distinguished by its 100W capacity and specific impedance characteristics tailored for popular amplifier architectures.
Replacement Considerations
- Hammond 1750B
- Hammond 1750Y
- Hammond 1750E
FAQ
What is the primary impedance of the 1750U?
The primary impedance is 1,700 ohms center-tapped.
Does the 1750U support multiple secondary impedances?
Yes, it provides 4, 8, and 16 ohm secondary options.
