Hammond 290DEX 240V Lower Plate Voltage Bassman Power Transformer
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Create Free Business AccountKey Features
- 240V @ 50/60 Hz primary for export and non-120V mains
- 650Vct @ 230 mA high-voltage secondary (325-0-325)
- 50V bias winding plus 6.3Vct @ 4A heater winding
- 5V @ 3A winding
- Bobbin-wound construction
- Listed for Tweed 5F6/5F6A Bassman and 5F4/6G4/6G4-A Super (lower plate voltage)
- RoHS and REACH compliant; 8 lbs (3.63 kg) shipping weight
The 290DEX is a bobbin-wound power transformer from the Hammond 290 Series, listed as a replacement for Fender guitar amplifiers. It is the 240V @ 50/60 Hz version of this lower-plate-voltage design, aimed at amp techs, restorers and builders working on vintage-style tube amps outside 120V regions.
Its high-voltage winding is rated 650Vct @ 230 mA (short description 325-0-325), with a 50V bias winding, a 6.3Vct @ 4A heater winding and a 5V @ 3A winding.
The ordering table lists the 290DEX for the BASSMAN (Lower Plate Volts) with Tweed 5F6 and 5F6A chassis and Combos, the SUPER (lower plate voltage) with Tweed 5F4, Brownface 6G4 and 6G4-A chassis, and the 59 BASSMAN. Amp model and chassis references are given for reference only, so confirm your chassis before ordering.
Hammond designed the 290 Series for drop-in replacement of original units, with parts made to look similar to the original factory transformers where possible and materials and design specs kept as close as possible to the original part to preserve the stock tone.
The part is RoHS and REACH compliant, ships at 8 lbs (3.63 kg), and carries UPC 623980252254 and UNSPSC 39121301 for purchasing systems.
Ideal For
- Tweed Bassman 5F6/5F6A power transformer replacement on 240V mains
- Tweed and Brownface Super lower-plate-voltage rebuilds
- 59 Bassman style amp builds
- Tube guitar amp repair
Overview
| Series | 290 Series (Tube Guitar Amplifier - Power Transformers) |
| Part Number | 290DEX |
| Product Type | Power transformer, replacement for Fender guitar amp, 290 series |
| Short Description | 325-0-325,5V@3A, 6.3VCT@4A |
| Amp Model (Ref. Only) | BASSMAN*(Lower Plate Volts) |
| Chassis No. (Ref. Only) | Tweed, 5F6, 5F6A |
| Amp Manufacturer (Ref. Only) | Fender |
Electrical
| Secondary 1 | 650Vct @ 230 mA |
| Secondary 2 | 50V Bias |
| Secondary 3 | 6.3Vct @ 4A |
| Secondary 4 | 5V @ 3A |
| Primary Volts | 240V @ 50/60 Hz |
Identifiers
| UPC | 623980252254 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 8 lbs (3.63 kg) |
Construction & Finish
| Winding | Bobbin |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
Amp Cross-Reference (Ref. Only)
| Listed Amp (Fender Table) | 59 BASSMAN* |
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Frequently Asked Questions
What mains voltage does the 290DEX need?▾
The 290DEX primary is rated 240V @ 50/60 Hz. The 290DX is the version listed with a 120V @ 60 Hz primary and the same secondary ratings.
What are the secondary ratings?▾
650Vct @ 230 mA, 50V bias, 6.3Vct @ 4A and 5V @ 3A.
Which amplifiers is it listed for?▾
The ordering table lists BASSMAN (Lower Plate Volts) Tweed 5F6/5F6A and Combos, SUPER (lower plate voltage) Tweed 5F4, Brownface 6G4 and 6G4-A, and 59 BASSMAN. These references are for reference only.
Is it bobbin or paper wound?▾
The ordering table lists the winding as Bobbin.
How much does it weigh?▾
The shipping weight is 8 lbs (3.63 kg).
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