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Product Detailed Parameters
- Description：AUDIO TRANSFORMER, LINE INPUT, C
- Series：1140
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：1.375" Dia (34.93mm)
- Height - Seated (Max)：1.732" (43.99mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：4:01
- Impedance - Primary (Ohms)：38.5k
- Impedance - Secondary (Ohms)：110
- DC Resistance (DCR) - Primary：820Ohm
- DC Resistance (DCR) - Secondary：-
- Transformer Type：Impedance Matching
- Frequency Range：20Hz ~ 20kHz
- Frequency Response：-0.2dB ~ 0.05dB
- Voltage - Isolation：500V
- Insertion Loss：-
- Return Loss：-
- Power Level：+26dB
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 1140-LN-C is a single-channel audio signal transformer designed for line input applications. It features chassis mounting with wire lead termination and utilizes a nickel alloy core to ensure high performance and wide bandwidth. The component provides an impedance ratio of 36K to 2.2K, with specific primary and secondary impedances of 38.5 kOhms and 110 Ohms respectively. It operates within a frequency response range of 20 Hz to 20 kHz ±0.35 dB. The unit includes shielding and measures 2.25 inches in length and 1.732 inches in width.
Feature Summary
- Designed with nickel alloy cores for high performance and wide bandwidth
- Provides studio-grade impedance matching for audio applications
- Features shielded construction to minimize interference
Applications
- Line input stage interfacing
- Studio-grade audio equipment
- Chassis-mounted audio systems
Procurement Notes
Verify the exact impedance specifications against the official datasheet before integration, as variations may exist between distributors. Confirm that the chassis mount dimensions and wire lead lengths meet your enclosure requirements. Ensure the shielding type aligns with your electromagnetic compatibility needs. Cross-reference the manufacturer part number to avoid confusion with similar series models.
Selection Notes
Select this model when a specific 38.5k to 110 ohm impedance transformation is required for line-level signals. The chassis mount form factor is suitable for fixed installations where space allows. Consider the nickel alloy core benefits if wide bandwidth and low distortion are critical for the audio fidelity of the application.
Part Context
This component belongs to the 1140 Series of Studio Grade Impedance Matching Transformers by Hammond Manufacturing. The series offers various impedance ratios tailored for different audio interface requirements. The 1140-LN-C specifically addresses the need for matching high-impedance sources to lower-impedance loads in professional audio environments.
Replacement Considerations
The 1140-LN-A is a related model in the same series but features a different impedance ratio of 10k to 20k. Verify that the impedance mismatch does not affect signal integrity if substituting. No other direct substitutes are confirmed in public documentation.
