Transformer - Marshall Replacement, Power, 50 W

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Transformer - Marshall Replacement, Power, 50 W

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A good upgrade for later issue Marshall amplifiers. Good replacement for JMP and JCM 800s for EL34! Features a paper bobbin. Built to vintage specs with exact interleave ratios and materials.


Power Rating 50 W
Mounting Centers 3.25" x 3.25"

No-Load Voltages Apply 120V, 60Cy to BLU-BLK (BLK on pri side) Measure on primary side: BLU-ORN = 225.1V BLU-YEL = 247V Measure on secondary side: RED-BLK = 364V (the thin BLK wire) RED-RED = 727V BLK-BRN = 3.49V (the heavy BLK wire) BLK-ORN = 6.97V

Wiring Diagram:

Wiring Diagram
RoHS Compliant
Item ID:
Replacement Type:
Product Measurements by Type
Audio Power50 W
Item Height4.504 in.
Item Length3.755 in.
Item Width4.187 in.
Mounting Hole Center to Center A3.25 in.
Mounting Hole Center to Center B3.25 in.
Mounting Hole Diameter0.215 in.
Packaging Information
Packaging Dimensions4.6 in. × 4.3 in. × 3.9 in.
Weight (Packaging)8.794 lbs.
GIF: Wiring DiagramAll Models

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Specifications, Files, and Documents

GIF: Wiring Diagram Wiring Diagram3.05 KB

Questions and Answers

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Asked by Anonymous on March 22nd, 2017.
Matt H
March 22nd, 2017
We are not techs here at Amplified parts and can not offer you technical advice. You may want to contact an amp tech for more information.
Asked by Anonymous on May 2nd, 2018.
Matt H
May 4th, 2018
Please contact us at: so we can help you find the right transformer.
Asked by Anonymous on April 29th, 2021.
April 29th, 2021
Staff Member
We do not have sizing information for the Origin 50C to confirm, but the mounting hole center to center measurements for this unit are 3.25 in. x 3.25 in.

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