# Marshall JCM 800 - 50 Watt\* Guitar Amp Replacement Transformers

**URL:** <https://forum.digikey.com/t/marshall-jcm-800-50-watt-guitar-amp-replacement-transformers/26654>\
**Category:** Transformers\
**Tags:** hammond-manufacturing, cross-reference, transformers\
**Created:** [November 10, 2022, 11:24pm UTC](https://forum.digikey.com/t/marshall-jcm-800-50-watt-guitar-amp-replacement-transformers/26654 "2022-11-10T23:24:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ryan\_2724](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/ryan_2724/32/1716_2.png) [@Ryan\_2724](https://forum.digikey.com/u/Ryan_2724)\
**Post date:** [November 10, 2022, 11:24pm UTC](https://forum.digikey.com/t/marshall-jcm-800-50-watt-guitar-amp-replacement-transformers/26654/1 "2022-11-10T23:24:54Z")

</div>

#### Features

- Physically, parts were designed to look similar to original factory units (where possible).
- Material used & design specs. were kept as close as possible to the original part to preserve the stock “tone”.
- See drawing for specifications and size.
- Do you know of any models we don’t list? If so please contact us for information.
- **DISCLAIMER** : \* Hammond Mfg. or Digi-Key is not affiliated with Marshall Amplification. Amplifier model names are trademarks of the Amplifier companies and are just listed here for reference purpose only.

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### Power Transformer Domestic/International 120/220/240V, 50/60 Hz.

Part No. [HM5040-ND](https://www.digikey.com/en/products/detail/hammond-manufacturing/290GX/2357971) (290GX)

_Used in JCM 800 - 50 Watt chassis:_\* JCM 800 - 50 Watt\*

_Marshall No:_\* X style “vertical mount”  
**Core:** Bobbin

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### Power Transformer Domestic/International 120/220/240V, 50/60 Hz.

Part No. [290GZ](https://www.digikey.com/en/products/result?s=N4IgTCBcDa4JwAYDiAtEBdAvkA)  
-If clicking on the part doesn’t bring you to the product page, it may be a special order item. [Click here](https://feedback.digikey.com/jfe/form/SV_db8JdeT9bwYQlWl) for special order form to have the part specially ordered.

_Used in JCM 800 - 50 Watt chassis:_\* JCM 800 - 50 Watt\*

_Marshall No:_\* Z style “lay down” suitable for most JCM 50 Watt kits  
**Core:** Bobbin

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### Output Transformer - 4, 8, 16 Ohms

Part No. [HM4570-ND](https://www.digikey.com/en/products/detail/hammond-manufacturing/1750N/2358172) (1750N)

_Used in JCM 800 - 50 Watt chassis:_\* JCM 800 - 50 Watt\*

_Marshall No:_\* Unknown  
**Core:** Bobbin

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### Choke - 5H @ 120 mA DC

Part No. [HM4804-ND](https://www.digikey.com/en/products/detail/hammond-manufacturing/194F/3869343) (194F)

_Used in JCM 800 - 50 Watt chassis:_\* JCM 800 - 50 Watt\*

_Marshall No:_\* Unknown

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> The TechForum Cross Reference category is for parts that Digi-Key does not sell or parts that have gone obsolete. Our Engineers and Techs have reviewed the specifications for these parts and made a recommendation for a replacement. Please review the suggested part to ensure it will work for your application.