Hammond 290KX 50W JCM 900 Marshall Replacement Power Transformer
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Create Free Business AccountKey Features
- Listed for the Marshall JCM 900 50 watt (reference only)
- 120/240 VAC 50/60 Hz primary
- 332V @ 300 mA high-voltage secondary
- 6.6Vct @ 4A heater winding
- 41Vct @ 100 mA auxiliary winding
- Bobbin-wound construction
- 7.15 lbs (3.24 kg); RoHS and REACH compliant
The 290KX is a Hammond 290 Series power transformer listed as a replacement for the Marshall JCM 900 50 watt. The part page short description reads AUDIO 50WATT 340V/40VCT/6.3VCT. It is aimed at technicians and players who need to replace the power transformer in this amp.
Its primary is rated 120/240 VAC 50/60 Hz. The ordering table lists a 332V @ 300 mA high-voltage secondary, a 6.6Vct @ 4A heater winding and a 41Vct @ 100 mA auxiliary winding, with bobbin winding.
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.
Its three secondaries include a centre-tapped 41V winding in addition to the high-voltage and heater windings.
The 290KX ships at 7.15 lbs (3.24 kg). It is RoHS and REACH compliant and is identified by UPC 623980094281 and UNSPSC 39121301. No similar amp part number is listed, and the amp model reference is for reference only. For the 100 watt JCM 900 and JCM2000, the ordering table lists the 290JX.
Ideal For
- Marshall JCM 900 50 watt power transformer replacement
- Dual-voltage tube amp repair
- Marshall amp restoration
Overview
| Series | 290 Series (Tube Guitar Amplifier - Power Transformers) |
| Part Number | 290KX |
| Product Type | Power transformer, replacement for Marshall guitar amp, 290 series |
| Short Description | AUDIO 50WATT 340V/40VCT/6.3VCT |
| Amp Model (Ref. Only) | JCM 900 - 50 watt |
| Amp Manufacturer (Ref. Only) | Marshall |
Electrical
| Secondary 1 | 332V @ 300 mA |
| Secondary 2 | 6.6Vct @ 4A |
| Secondary 3 | 41Vct @ 100 mA |
| Primary Volts | 120/240 VAC 50/60 Hz. |
Identifiers
| UPC | 623980094281 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 7.15 lbs (3.24 kg) |
Construction & Finish
| Winding | Bobbin |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
Amp Cross-Reference (Ref. Only)
| Listed Amp (Marshall Table) | JCM 900* - 50 Watt |
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Frequently Asked Questions
Which amp is the 290KX listed for?▾
The Marshall JCM 900 50 watt, for reference only.
What are the secondaries?▾
332V @ 300 mA, 6.6Vct @ 4A and 41Vct @ 100 mA.
What primary voltage does it use?▾
120/240 VAC 50/60 Hz.
Is it bobbin wound?▾
Yes, per the ordering table.
What does it weigh?▾
7.15 lbs (3.24 kg) shipping weight.
