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Product Detailed Parameters
- Description：AUDIO XFMR 25K / 600CT CHAS MNT
- Series：143
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：1.000" L x 0.690" W (25.40mm x 17.53mm)
- Height - Seated (Max)：0.690" (17.53mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：25k
- Impedance - Secondary (Ohms)：600CT
- DC Resistance (DCR) - Primary：1.89kOhm
- DC Resistance (DCR) - Secondary：25Ohm
- Transformer Type：Economical Open Type
- Frequency Range：150Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：30mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 143R is an audio driver transformer designed for chassis mounting. It features a primary impedance of 25,000 Ohms and a secondary impedance of 600 Ohms with a center tap. The component operates within a frequency range of 150 Hz to 15 kHz and provides a power rating of 30 mW. This unit belongs to the 143-146 series of audio transformers.
Feature Summary
- Chassis mount construction for secure installation
- Audio driver application with specified impedance matching
- Center-tapped secondary winding configuration
Applications
- Audio signal driving circuits
- Impedance matching in audio equipment
- Transformer-based audio interface design
Procurement Notes
Verify the specific datasheet version for the 143R model to confirm exact electrical tolerances and pinout configurations. Ensure compatibility with the intended chassis mounting requirements and thermal environment. Cross-reference the manufacturer's official documentation for any updates regarding RoHS compliance or material specifications prior to final procurement decisions.
Selection Notes
Select this component when a 25k:600 CT impedance transformation ratio is required for audio driver applications. Consider the 30 mW power handling capability and the 150 Hz to 15 kHz frequency response as critical parameters. Evaluate chassis mounting constraints against the physical dimensions provided in the official technical drawings.
Part Context
The 143R is part of the Hammond Manufacturing 143-146 series of audio transformers. These components are engineered for specialized audio applications requiring precise impedance transformation between high-impedance sources and low-impedance loads. The series offers various impedance ratios tailored for different audio driver configurations.
Replacement Considerations
Consult Hammond Manufacturing's official substitution guide for direct replacements. Verify that alternative components match the 25k:600 CT impedance ratio, 30 mW power rating, and chassis mounting style to ensure functional equivalence.
