124B

Description：AUDIO XFMR 10K / 90KCT CHAS MNT
Series：124
Mfr：Hammond Manufacturing
Package：Bulk

SKU:408f1ce84f53 Category: Audio Transformers Brand: Hammond Manufacturing

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Product introduction

Product Detailed Parameters

Description：AUDIO XFMR 10K / 90KCT CHAS MNT
Series：124
Mfr：Hammond Manufacturing
Package：Bulk
Mounting Type：Chassis Mount
Size / Dimension：2.380" L x 1.350" W (60.45mm x 34.29mm)
Height - Seated (Max)：1.430" (36.32mm)
Termination Style：Wire Leads
Turns Ratio - Primary:Secondary：1:03
Impedance - Primary (Ohms)：10k
Impedance - Secondary (Ohms)：90kCT
DC Resistance (DCR) - Primary：405Ohm
DC Resistance (DCR) - Secondary：1.525kOhm
Transformer Type：Tube Driver and Speaker Matching
Frequency Range：150Hz ~ 15kHz
Frequency Response：±1dB
Voltage - Isolation：500Vrms
Insertion Loss：-
Return Loss：-
Power Level：5W
Operating Temperature：-
Approval Agency：-

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124B

Overview

The Hammond Manufacturing 124B is a tube driver interstage audio transformer rated for 5 watts, designed specifically for push-pull circuits. It features a primary impedance of 5 kOhms and a secondary impedance of 3.4 kOhms. The unit provides an insulation voltage of 2000 Vrms and operates within a frequency range of 20 Hz to 20 kHz. Physical dimensions are 2.88 inches in length, 1.7 inches in width, and 2.37 inches in height.

Feature Summary

Engineered for general-purpose use in push-pull or phase inverter tube driver circuits
Not suitable for single-ended applications

Applications

Push-pull tube output circuits
Phase inverter tube driver circuits
High-fidelity audio amplifier designs

Procurement Notes

Verify the specific datasheet version when ordering, as factory modifications may be available for this part number. Confirm that the application strictly utilizes push-pull topology, as the component is explicitly unsuitable for single-ended configurations. Cross-reference physical mounting requirements with the provided dimensional data to ensure compatibility with existing chassis layouts.

Selection Notes

Select the 124B only when designing or repairing push-pull tube driver stages requiring a 5-watt rating. Ensure the circuit topology matches the specified impedance values of 5 kOhms primary and 3.4 kOhms secondary. Do not utilize this transformer for single-ended applications due to design limitations. Validate that the operating frequency range meets the audio fidelity requirements of the target system.

Part Context

This component belongs to the Hammond Manufacturing Classic Audio Transformers portfolio, which specializes in high-quality magnetics for tube applications. The series includes various transformers for high and low voltage, single-ended, and push-pull tube audio outputs. The 124B represents the interstage driver category within this lineup, focusing on signal coupling between tube stages rather than power output transformation.