290UX

Description：AUDIO XFMR CHAS MNT
Series：290
Mfr：Hammond Manufacturing
Package：Bulk

SKU:d5c50f5c442f Category: Audio Transformers Brand: Hammond Manufacturing

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Product introduction

Product Detailed Parameters

Description：AUDIO XFMR CHAS MNT
Series：290
Mfr：Hammond Manufacturing
Package：Bulk
Mounting Type：Chassis Mount
Size / Dimension：3.125" L x 3.250" W (79.38mm x 82.55mm)
Height - Seated (Max)：3.813" (96.85mm)
Termination Style：Wire Leads
Turns Ratio - Primary:Secondary：-
Impedance - Primary (Ohms)：-
Impedance - Secondary (Ohms)：-
DC Resistance (DCR) - Primary：4.14Ohm
DC Resistance (DCR) - Secondary：80mOhm, 4.8Ohm, 44.94Ohm
Transformer Type：-
Frequency Range：-
Frequency Response：-
Voltage - Isolation：120/240VAC
Insertion Loss：-
Return Loss：-
Power Level：-
Operating Temperature：-
Approval Agency：-

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290UX

Overview

The Hammond Manufacturing 290UX is a power transformer designed for tube guitar amplifiers, specifically serving as a replacement for Fender models. It operates at 115 VAC primary voltage and 60 Hz frequency. The unit features a single primary winding and dual secondary windings with center tap configuration. Key electrical ratings include a 660 VAC CT high voltage secondary and a 6.3 VCT filament secondary. The component utilizes wire lead termination and chassis mount installation style.

Feature Summary

Designed as a direct replacement for specific Fender guitar amplifier power transformers
Features dual secondary windings providing both high voltage plate supply and filament heating
Constructed with a laminated core for standard audio frequency operation

Applications

Replacement in Fender Pro Jr. tube guitar amplifiers
Restoration of vintage Fender Bassman 59 reissue amplifiers
General tube guitar amplifier power supply reconstruction

Procurement Notes

Verify the exact original equipment manufacturer part number or schematic requirements before purchase. Confirm that the physical dimensions and terminal layout match the existing chassis cutouts and wiring harness. Ensure the replacement aligns with the specific amplifier model's voltage and current specifications to prevent damage to vacuum tubes or other components.

Selection Notes

Select this transformer when replacing a failed unit in compatible Fender tube amplifiers. Consider the 290 series compatibility for chassis mounting constraints. Evaluate the need for shielded versus unshielded variants based on hum requirements, though this specific model is typically unshielded. Verify wire lead lengths against the existing assembly.

Part Context

This component belongs to the Hammond 290 series, a line of power transformers widely used in musical instrument amplification. The series includes various models tailored for different amplifier power classes and chassis sizes. The 290UX is positioned as a specialized replacement part rather than a general-purpose industrial control transformer.