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Product Detailed Parameters
- Description：AUDIO XFMR 4KCT / 8 CHAS MNT
- Series：146
- 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)：4kCT
- Impedance - Secondary (Ohms)：8
- DC Resistance (DCR) - Primary：220Ohm
- DC Resistance (DCR) - Secondary：700mOhm
- Transformer Type：Economical Open Type
- Frequency Range：150Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：-
- Return Loss：-
- Power Level：700mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 146S is an economical open-type audio transformer designed for chassis mounting. It features a primary impedance of 4000 center-tapped ohms and a secondary impedance of 8 ohms. The unit operates within a frequency range of 150Hz to 15kHz with a response accuracy of ±1dB. Electrical characteristics include a primary DC resistance of 23 ohms and a secondary DC resistance of 0.7 ohms. The transformer supports a power level of 700mW and utilizes wire lead termination. Physical dimensions are 1.630 inches in length, 0.880 inches in width, and 0.810 inches maximum height when mounted.
Feature Summary
- Economical open-frame construction suitable for standard chassis installation
- Center-tapped primary winding configuration for balanced audio applications
- Flexible insulated leads with color coding for simplified wiring
Applications
- Audio output stage coupling
- Impedance matching in amplifier circuits
- Chassis-mounted audio equipment assembly
Procurement Notes
Verify the specific part number suffix against the manufacturer datasheet to confirm impedance values and lead lengths. Ensure the required center-tap configuration matches the circuit design. Confirm compliance with RoHS3 standards if environmental regulations apply to the project. Cross-reference the DigiKey or Mouser part identifiers to ensure accurate sourcing from authorized distributors.
Selection Notes
Select this component for applications requiring a low-cost, open-frame audio transformer with a 4kCT primary to 8-ohm secondary ratio. Consider the physical mounting constraints as it requires a two-hole horizontal bracket. Verify that the 150Hz to 15kHz frequency response meets the signal bandwidth requirements. Ensure the 700mW power handling capacity is sufficient for the intended audio signal levels.
Part Context
The 146S belongs to the Hammond 143-146 series of audio transformers. This series provides economical solutions for general-purpose audio coupling tasks. The components are characterized by their open construction and straightforward mounting options, making them suitable for custom audio builds where enclosed shielding is not strictly required.
Replacement Considerations
The 146E serves as a direct substitute within the same series, offering identical mounting and functional characteristics but with a different primary impedance of 100CT ohms instead of 4000CT.
