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Product Detailed Parameters
- Description：AUDIO XFMR 150 / 3.8K CHAS MNT
- Series：1140
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：-
- Height - Seated (Max)：-
- Termination Style：Screw Terminal
- Turns Ratio - Primary:Secondary：1:05
- Impedance - Primary (Ohms)：150
- Impedance - Secondary (Ohms)：3.8k
- DC Resistance (DCR) - Primary：-
- DC Resistance (DCR) - Secondary：-
- Transformer Type：Impedance Matching
- Frequency Range：20Hz ~ 20kHz
- Frequency Response：±0.35dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：-
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1140-MN-B is a studio-grade audio transformer designed for microphone input applications. It features a chassis mount configuration with wire lead termination. The device operates within a frequency range of 20 Hz to 20 kHz, maintaining a response accuracy of ±0.35 dB relative to 1 kHz. It utilizes a nickel alloy core and mu-metal shielding for high performance. Key electrical parameters include a primary impedance of 150 ohms and a secondary impedance of 3.8 k ohms. Physical dimensions are 2.25 inches in length and 1.724 inches in width.
Feature Summary
- Designed with nickel alloy cores for high performance and wide bandwidth
- Provides excellent shielding from broad interference using mu-metal cans
- Ensures low distortion for studio-grade impedance matching
Applications
- Microphone input stages
- Studio-grade impedance matching
- Chassis-mounted audio signal transformers
Procurement Notes
Verify the specific part number suffix against official Hammond Manufacturing documentation to confirm exact impedance ratios and termination styles. Ensure compatibility with chassis mounting requirements and verify that the wire lead type matches the intended circuit board or panel interface. Cross-reference datasheet specifications for thermal limits and insulation ratings before integration.
Selection Notes
Select this component when a step-up ratio from low-impedance microphones to high-impedance inputs is required. The 150 to 3.8k ohm ratio suits professional audio environments. Consider the physical size constraints due to the chassis mount design. Verify that the 20 Hz to 20 kHz frequency response meets the application's bandwidth needs without requiring additional equalization.
Part Context
This unit belongs to the 1140 series of audio and signal transformers manufactured by Hammond Manufacturing. The series focuses on studio-grade performance with robust shielding capabilities. These components are engineered for reliability in professional audio equipment where signal integrity and minimal distortion are critical operational requirements.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided source material. Consult Hammond Manufacturing technical support for direct equivalents or cross-reference options based on specific impedance and form-factor requirements.
FAQ
What is the frequency response specification?
The frequency response is 20 Hz to 20 kHz with an accuracy of ±0.35 dB, referenced at 1 kHz.
What core material is used in this transformer?
The transformer uses a nickel alloy core combined with mu-metal shielding for enhanced performance.
