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Product Detailed Parameters
- Description：AUDIO XFMR 200K / 1K TH
- Series：148
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：0.820" L x 0.680" W (20.83mm x 17.27mm)
- Height - Seated (Max)：0.690" (17.53mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：200k
- Impedance - Secondary (Ohms)：1k
- DC Resistance (DCR) - Primary：1.76kOhm
- DC Resistance (DCR) - Secondary：6.2Ohm
- Transformer Type：Economical Open Type
- Frequency Range：200Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：0.5dB
- Return Loss：-
- Power Level：3mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 148D is an audio signal transformer designed for open-frame PC board mounting. It features a single channel with through-hole pin terminal termination. The device operates within a frequency range of 200 Hz to 15 kHz. Electrical specifications include a primary coil impedance of 20 kΩ and a secondary coil impedance of 1 kΩ. Physical dimensions are 0.82 inches in length, 0.68 inches in width, and 0.69 inches in height.
Feature Summary
- Open-frame construction suitable for printed circuit board integration
- Single-channel design optimized for driver applications
- Through-hole pin terminal termination for secure mounting
Applications
- Audio signal processing circuits
- Driver stage coupling
- Signal impedance matching
Procurement Notes
Verify the specific part number against official Hammond Manufacturing documentation to ensure accuracy. Confirm that the component meets all required electrical and physical specifications for the intended application before procurement. Cross-reference datasheets for any updates regarding compliance or manufacturing changes.
Selection Notes
Select this component based on its specific impedance ratio and frequency response requirements. Ensure the physical footprint and mounting style align with the target PCB layout. Verify compatibility with the operating environment and signal levels required by the circuit design.
Part Context
The 148D belongs to the Hammond Manufacturing 148 series of audio transformers. This series provides specialized components for audio and signal processing applications. The 148D variant offers specific impedance characteristics tailored for driver stages within larger audio systems.
Replacement Considerations
Consult official Hammond Manufacturing substitution guides for verified alternative part numbers. Do not assume cross-compatibility with other manufacturers' products without thorough technical validation.
