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Product Detailed Parameters
- Description：AUDIO XFMR 600CT / 150CT TH
- Series：149
- Mfr：Hammond Manufacturing
- Package：Bulk
- Mounting Type：Through Hole
- Size / Dimension：1.060" L x 0.820" W (26.92mm x 20.83mm)
- Height - Seated (Max)：0.820" (20.83mm)
- Termination Style：PC Pin
- Turns Ratio - Primary:Secondary：-
- Impedance - Primary (Ohms)：600CT
- Impedance - Secondary (Ohms)：150CT
- DC Resistance (DCR) - Primary：53Ohm
- DC Resistance (DCR) - Secondary：17Ohm
- Transformer Type：Economical Open Type
- Frequency Range：200Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：0.5dB
- Return Loss：-
- Power Level：1000mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 149S is an open-frame audio transformer designed for PC board mounting. It features a single channel with radial pin terminals and operates within a frequency range of 200 Hz to 15 kHz. The primary winding has a center-tapped impedance of 600 ohms, while the secondary windings offer center-tapped configurations of 150 ohms each. This component is rated for a maximum DC current of 42 mA and includes a maximum DC resistance specification.
Feature Summary
- Open-frame construction facilitates direct printed circuit board integration
- Center-tapped primary and secondary windings support balanced signal applications
- Radial pin terminal configuration ensures secure mechanical and electrical connections
Applications
- Audio signal level matching in professional sound equipment
- Impedance transformation between high-impedance sources and low-impedance loads
- Balanced-to-unbalanced signal conversion in broadcast systems
Procurement Notes
Verify the specific impedance configuration required for your circuit design, as center-tapped variants exist within this series. Confirm that the operating frequency range aligns with your application's bandwidth requirements. Ensure the PCB layout accommodates the radial pin spacing and physical dimensions specified in the official datasheet to prevent installation issues.
Selection Notes
Select the 149S when a 600-ohm source must interface with 150-ohm loads requiring center taps. Consider the open-frame design implications regarding electromagnetic interference shielding if used in sensitive environments. Evaluate the power handling capabilities against the expected signal levels to ensure reliable operation without saturation or distortion during peak usage.
Part Context
This component belongs to the Hammond 149 series of audio transformers, which are engineered for general-purpose audio signal processing. The series offers various impedance combinations to suit different transmission line standards. The 149S specifically addresses applications requiring 600-ohm to 150-ohm conversion with center-tap functionality for balanced audio paths.
