125ESE

Description：XFMR 2.5K-10K / 4-32 CHAS MNT
Series：125SE
Mfr：Hammond Manufacturing
Package：Bulk

SKU:ed3666ca13aa Category: Audio Transformers Brand: Hammond Manufacturing

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Product introduction

Product Detailed Parameters

Description：XFMR 2.5K-10K / 4-32 CHAS MNT
Series：125SE
Mfr：Hammond Manufacturing
Package：Bulk
Mounting Type：Chassis Mount
Size / Dimension：4.500" L x 2.360" W (114.30mm x 59.94mm)
Height - Seated (Max)：2.940" (74.68mm)
Termination Style：Wire Leads
Turns Ratio - Primary:Secondary：-
Impedance - Primary (Ohms)：2.5k ~ 10k
Impedance - Secondary (Ohms)：4 ~ 32
DC Resistance (DCR) - Primary：100.5Ohm
DC Resistance (DCR) - Secondary：590mOhm
Transformer Type：General Purpose
Frequency Range：100Hz ~ 15kHz
Frequency Response：±1dB
Voltage - Isolation：1500V @ 1 Second
Insertion Loss：-
Return Loss：-
Power Level：15W
Operating Temperature：-
Approval Agency：-

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125ESE

Overview

The Hammond Manufacturing 125ESE is a universal audio transformer designed for single-ended tube amplifier outputs. It features a power rating of 15 W and operates within a specified frequency response range suitable for general-purpose applications. The primary impedance ranges from 2,500 to 10,000 Ohms, while the secondary impedance supports loads between 4 and 32 Ohms. Maximum DC current capacity is rated at 80 mA. The unit measures 4.50 inches in length.

Feature Summary

Designed specifically for single-ended tube output configurations
Universal compatibility for general-purpose or replacement use
Supports variable primary impedance matching

Applications

Single-ended tube amplifier output stages
General-purpose audio signal transformation
Replacement for legacy tube amplifier designs

Procurement Notes

Verify that the specific application requires single-ended topology rather than push-pull, as this model is not suitable for balanced outputs. Confirm that the load impedance falls within the 4 to 32 Ohm range and that the source circuit can handle the specified maximum DC current of 80 mA without saturation. Ensure mechanical dimensions fit the intended chassis space.

Selection Notes

Select this component when a 15 W rating is required for single-ended tube circuits. Consider the wide primary impedance range (2,500 to 10,000 Ohms) for flexible matching with various output tubes. This model is intended for general-purpose use rather than high-fidelity critical listening environments where tighter tolerances might be necessary.

Part Context

This part belongs to the Hammond Manufacturing audio transformer lineup, which includes both single-ended and push-pull variants. While similar models like the 125A serve push-pull applications, the 125ESE is distinctively engineered for single-ended topologies. It shares the manufacturer's focus on robust construction for tube-based audio equipment.