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Product Detailed Parameters
- Description：AUDIO XFMR 200K / 1K CHAS MNT
- Series：145
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Chassis Mount
- Size / Dimension：1.630" L x 0.880" W (41.40mm x 22.35mm)
- Height - Seated (Max)：0.810" (20.57mm)
- Termination Style：Wire Leads
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：200k
- Impedance - Secondary (Ohms)：1k
- DC Resistance (DCR) - Primary：3.6kOhm
- DC Resistance (DCR) - Secondary：33Ohm
- Transformer Type：Economical Open Type
- Frequency Range：150Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：10mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 145D is a chassis-mount audio transformer designed for signal input applications. It features a primary impedance of 200,000 ohms and a secondary impedance of 1,000 ohms. The device operates within a frequency range of 150 Hz to 15 kHz. Electrical specifications include a maximum DC current of 500 µA and a maximum DC resistance of 3,600 ohms. The power rating is 10 mW. Physical dimensions are 1.63 inches in length, 0.88 inches in width, and 0.81 inches in height.
Feature Summary
- Chassis mounting configuration with wire lead termination
- Designed for audio and signal transformer applications
- Optimized for specific impedance matching between primary and secondary circuits
Applications
- Audio equipment input stages
- Signal processing systems requiring impedance transformation
- Chassis-mounted electronic assemblies
Procurement Notes
Verify the exact part number against official Hammond Manufacturing documentation to ensure compatibility with system requirements. Confirm that the specified impedance ratios and physical dimensions align with the design constraints. Check for any updated regulatory compliance certifications or datasheet revisions prior to final procurement decisions.
Selection Notes
Select this component when a fixed 200k:1k impedance ratio is required for audio signal inputs. Ensure the chassis mounting style and wire lead termination suit the enclosure design. Verify that the 150 Hz to 15 kHz frequency response meets the application's bandwidth needs. Consider the physical size constraints relative to the available chassis space.
Part Context
The 145D belongs to the Hammond 143-146 series of audio transformers. This series provides various impedance configurations for different audio circuit requirements. The 145D specifically addresses high-impedance input scenarios common in vintage and professional audio equipment designs.
Replacement Considerations
Consult official Hammond Manufacturing cross-reference lists for verified substitutes. Generic replacements may not match the precise impedance ratio or frequency response characteristics.
