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Product Detailed Parameters
- Description：AUDIO XFMR 450 / 160, 40/40 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)：450
- Impedance - Secondary (Ohms)：160, 40/40
- DC Resistance (DCR) - Primary：52Ohm
- DC Resistance (DCR) - Secondary：19Ohm
- Transformer Type：Economical Open Type
- Frequency Range：200Hz ~ 15kHz
- Frequency Response：±1dB
- Voltage - Isolation：-
- Insertion Loss：0.5dB
- Return Loss：-
- Power Level：200mW
- Operating Temperature：-
- Approval Agency：-
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Overview
The Hammond Manufacturing 149F is an open-frame audio signal transformer designed for PC board mounting. It functions as a driver transformer with a primary impedance of 450 ohms and dual secondary impedances of 40 ohms and 160 ohms. The component operates within a frequency range of 200 Hz to 15 kHz. It utilizes radial pin terminals for connection and is constructed for single-channel audio signal applications.
Feature Summary
- Open-frame construction facilitates direct printed circuit board integration.
- Dual secondary winding configuration supports varied impedance matching requirements.
- Radial pin terminal design ensures secure mechanical and electrical attachment.
Applications
- Audio amplifier driver stages
- Signal coupling in audio equipment
- Impedance matching circuits
Procurement Notes
Verify the specific part number against official Hammond Manufacturing documentation to confirm impedance values and physical dimensions. Ensure compatibility with the intended PCB layout and thermal environment. Cross-reference datasheets for accurate electrical specifications before procurement.
Selection Notes
Select this component based on the required primary and secondary impedance ratios for the specific audio application. Consider the open-frame design for heat dissipation and the radial lead style for PCB mounting constraints. Verify frequency response requirements align with the specified operational range.
Part Context
This component belongs to the Hammond Manufacturing line of audio and signal transformers. It is categorized under open-frame transformers suitable for driver applications. The product series focuses on providing reliable signal transformation for audio frequencies in electronic assemblies.
Replacement Considerations
Consult official Hammond Manufacturing substitution guides or equivalent manufacturer datasheets to identify compatible alternatives. Verify that any substitute matches the primary and secondary impedance values, frequency range, and mounting style to ensure circuit functionality.
FAQ
What are the primary and secondary impedance values?
The primary impedance is 450 ohms. The secondary windings offer 40 ohms and 160 ohms.
What type of mounting does this transformer use?
It uses an open-frame design with radial pin terminals for printed circuit board mounting.
