290ABX

Power Transformers Overview

The Hammond Manufacturing 290ABX is a laminated core power transformer designed for chassis mounting in tube guitar amplifiers. It features a single primary winding rated for 120V or 240V AC input at 50/60 Hz. The unit provides three secondary outputs: a high-voltage center-tapped winding delivering 293.5V, and two lower voltage windings rated at 6.3V and 5V. Maximum current ratings are specified as 100mA for the high-voltage section, with additional capacity for the heater supplies.

Power Transformers Feature Summary

• Designed specifically as a replacement component for Fender guitar amplifier circuits
• Utilizes a laminated core construction for stable power delivery to vacuum tubes
• Supports dual primary voltage configurations for international compatibility
• Provides multiple secondary voltages to simultaneously power rectifier plates and tube heaters

Power Transformers Applications

• Replacement power supply for Fender Bassman 59 reissue amplifiers
• Restoration of vintage tube guitar amplifiers requiring specific 290 series transformers
• Custom tube audio equipment builds utilizing standard Fender circuit topologies

Power Transformers Procurement Notes

Verify that the target amplifier circuit matches the 290ABX electrical specifications before installation. Confirm that the physical chassis dimensions accommodate the transformer footprint. Ensure the existing wiring harness supports the lead termination style provided by this component. Cross-reference the primary voltage requirements of the specific amplifier model to ensure correct connection to the mains supply.

Power Transformers Selection Notes

Select this model only when replacing a failed transformer in equipment originally designed around the Hammond 290 series specifications. Compare the required secondary voltages and current capacities against the original equipment manufacturer's schematics. Ensure the new unit fits within the available chassis space without obstructing other components. Verify that the mounting hole pattern aligns with the existing chassis structure.

Power Transformers Part Context

This component belongs to the Hammond 290 Series, a collection of power transformers widely used in the manufacturing of classic American tube guitar amplifiers. The series is characterized by its robust construction and specific voltage outputs tailored for common amplifier architectures. These transformers serve as the central power distribution unit, converting mains voltage to the various levels required by vacuum tube circuits.

Power Transformers Replacement Considerations

Direct substitutes include the Hammond 290AX and 290PX models, which share similar form factors and application contexts within the same product family.