148R

Description：AUDIO XFMR 20K / 1K, 250/250 TH
Series：148
Mfr：Hammond Manufacturing
Package：Bulk

SKU:b82c89360543 Category: Audio Transformers Brand: Hammond Manufacturing

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Product introduction

Product Detailed Parameters

Description：AUDIO XFMR 20K / 1K, 250/250 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)：20k
Impedance - Secondary (Ohms)：1k, 250/250
DC Resistance (DCR) - Primary：2.23kOhm
DC Resistance (DCR) - Secondary：123Ohm
Transformer Type：Economical Open Type
Frequency Range：200Hz ~ 15kHz
Frequency Response：±1dB
Voltage - Isolation：-
Insertion Loss：0.5dB
Return Loss：-
Power Level：50mW
Operating Temperature：-
Approval Agency：-

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148R

Overview

The Hammond Manufacturing 148R is an open-frame audio signal transformer designed for PC board mounting via through-hole pin terminals. It operates within a frequency range of 200 Hz to 15 kHz. The unit features a single channel configuration with a primary impedance of 20,000 ohms and a secondary impedance of 1,000 ohms. Electrical characteristics include a primary resistance of 2.23 kohms and a secondary resistance of 123 ohms. The 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 direct printed circuit board integration
Through-hole pin terminal termination style for secure mounting
Single-channel design optimized for audio driver applications

Applications

Audio signal processing circuits
Driver stage coupling in amplifier designs
Impedance matching between audio components

Procurement Notes

Verify the specific datasheet version and manufacturer documentation to confirm electrical tolerances and mechanical fit before integration. Ensure that the through-hole pin spacing matches the target PCB layout. Confirm RoHS compliance status if required by project specifications. Cross-reference the part number against official Hammond Manufacturing catalogs to validate current production status and availability constraints.

Selection Notes

Select this component when an open-frame audio transformer with a 20k:1k impedance ratio is required for PCB mounting. Consider the 200 Hz to 15 kHz frequency response limits for application suitability. Evaluate the physical footprint of 0.82 x 0.68 x 0.69 inches against available board space. Verify that the through-hole pin terminal style aligns with the manufacturing process and assembly requirements.

Part Context

The 148R belongs to the Hammond Manufacturing 148 Series, which specializes in audio and signal transformers. This series provides open-frame solutions for various audio applications. The 148R specifically addresses driver coupling needs with its defined impedance ratios. It represents a standard component for discrete audio circuit design where board-level integration is preferred over chassis mounting.