Hammond 291KX JTM 45/50 Replacement Power Transformer, 50/60 Hz
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Create Free Business AccountKey Features
- Replacement power transformer for JTM 45 and 50 Watt amplifiers
- Domestic/international primary: 100/120/220/230/240V
- 50/60 Hz operation
- Bobbin core construction
- Designed to look similar to the original factory unit where possible
- RoHS and REACH compliant; 11.65 lbs (5.28 kg) shipping weight
The 291KX is the standard replacement power transformer for Marshall* JTM 45 and 50 Watt tube guitar amplifiers. It suits repair technicians servicing an original amplifier as well as builders putting together a JTM-style chassis.
Its primary is configured for domestic and international service with taps for 100, 120, 220, 230 and 240V at 50/60 Hz, allowing the same part to be wired for the local mains supply. The transformer is built on a bobbin core.
The part was physically designed to look similar to the original factory unit where possible, and the materials and design specifications were kept as close as possible to the original to preserve the stock tone. For buyers who want extra headroom, the same series also offers an upgraded version with a 625Vct tap, a flux band and a 3A 5V winding; the 291KX is the version without those listed extras.
The 291KX has a shipping weight of 11.65 lbs (5.28 kg) and is RoHS and REACH compliant. The original Marshall* part number is listed as unknown, so use the manufacturer's drawing to confirm specifications and size. Hammond Mfg. is not affiliated with Marshall Amplification; model names are listed for reference only.
Ideal For
- Replacing a failed power transformer in a JTM 45 or 50 Watt amp
- JTM-style tube amplifier builds
- Setting up an amp for 100, 120, 220, 230 or 240V mains
Overview
| Product Type | Power Transformer |
| Short Description | POWER TRANS |
| Amplifier Application | Marshall* JTM 45 and 50 Watt |
| Original Marshall* Part No. | Unknown |
Electrical
| Frequency | 50/60 Hz |
| Primary Voltage | 100/120/220/230/240V (Domestic/International) |
Identifiers
| UPC | 623980474908 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 11.65 lbs (5.28 kg) |
Construction & Finish
| Core | Bobbin |
| Design | Designed to look similar to the original factory unit (where possible) |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Which amps is the 291KX designed for?▾
It is listed as a replacement power transformer for Marshall* JTM 45 and 50 Watt amplifiers.
How does the 291KX differ from the 290MAEX?▾
The 290MAEX is the upgraded version in the same series, adding a 625Vct high voltage tap, a flux band and a 3A 5V winding. The 291KX is the standard power transformer.
What primary voltages are available?▾
100/120/220/230/240V, 50/60 Hz.
What is the shipping weight?▾
11.65 lbs (5.28 kg).
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