# Fender Twin Reverb\* Guitar Amp Replacement Transformers

**URL:** <https://forum.digikey.com/t/fender-twin-reverb-guitar-amp-replacement-transformers/26409>\
**Category:** Transformers\
**Tags:** hammond-manufacturing, cross-reference, transformers\
**Created:** [October 31, 2022, 5:11pm UTC](https://forum.digikey.com/t/fender-twin-reverb-guitar-amp-replacement-transformers/26409 "2022-10-31T17:11:20Z")\
**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:** [October 31, 2022, 5:11pm UTC](https://forum.digikey.com/t/fender-twin-reverb-guitar-amp-replacement-transformers/26409/1 "2022-10-31T17:11:20Z")

</div>

#### Features

- Fender Twin Reverb\* & Twin Reverb 100\*, 100 Watts
- 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 Fender Musical Instruments Corp. 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 120V, 60 Hz.

Part No. [HM5039-ND](https://digikeytest.digikey.com/en/products/detail/hammond-manufacturing/290FX/2358080) (290FX)

**Used in Twin Reverb** \* AA270, AA769, AB763, AC568, Blackface, Silverface

_Fender No:_\* 125P34A, 022756  
**Core:** Paper

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

Part No. [HM5038-ND](https://digikeytest.digikey.com/en/products/detail/hammond-manufacturing/290FEX/2358184) (290FEX)

**Used in Twin Reverb** \* AA270, AA769, AB763, AC568, Blackface, Silverface

_Fender No:_\* 125P34A, 022756  
**Core:** Paper

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### Output Transformer - 4 Ohm

Part No. [HM4577-ND](https://digikeytest.digikey.com/en/products/detail/hammond-manufacturing/1750W/2358106) (1750W)

_Used in Twin Reverb chassis:_\* Twin Reverb, Twin Reverb 100\*, AA270, AA769, AB763, AC568, Blackface\*, Silverface\*

_Fender No:_\* 125A29A, 022889, 022897  
**Core:** Paper

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

Part No. [HM4590-ND](https://digikeytest.digikey.com/en/products/detail/hammond-manufacturing/1760W/2358161) (1760W)

_Used in Twin Reverb chassis:_\* Twin Reverb, Twin Reverb 100\*, AA270, AA769, AB763, AC568, Blackface\*, Silverface\*

_Fender No:_\* 125A29A, 022889, 022897  
**Core:** Paper

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### Output Transformer - 2, 4, 8 Ohm

Part No. [1750WA](https://digikeytest.digikey.com/en/products/result?s=N4IgTCBcDaIIwHYCsAGA6gQRAXQL5A)  
-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 Twin Reverb chassis:_\* Twin Reverb, Twin Reverb 100\*, AA270, AA769, AB763, AC568, Blackface\*, Silverface\*

_Fender No:_\* 125A29A, 022889, 022897  
**Core:** Paper

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### Reverb Driver

Part No. [HM2109-ND](https://digikeytest.digikey.com/en/products/detail/hammond-manufacturing/1750A/2358177) (1750A)

**Used in Twin Reverb, Twin Reverb 100** \* All the above

_Fender No:_\* 125A20B, 022921  
**Core:** Paper

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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.