Transformer - Reverb Driver, for Fender® Amps, 125A20B Replacement
Replacement reverb driver transformer for the Fender® part numbers 125A20B, 022921, and 037099. This is the standard reverb driver transformer used in most Fender amps that use a 12AT7 and transformer driven 4AB3C1B tank.
Found in countless Fender® models including original and reissues of the following:
- Fender Princeton Reverb
- Fender Deluxe Reverb
- Fender Vibrolux Reverb
- Fender Pro Reverb
- Fender Super Reverb
- Fender Twin Reverb
- Fender Quad Reverb
- Fender Super Six Reverb
- Fender Vibrosonic
- Many others
Diagram:

Amplifier Type | Single Ended | ||
Item Height | 1.71 in. | ||
Item Length | 2.01 in. | ||
Item Width | 1.665 in. | ||
Mounting Hole Center to Center A | 1.7 in. | ||
Mounting Hole Diameter | 0.179 in. | ||
Power | 3.5 W | ||
Primary | 25 kΩ | ||
Secondary | 8 Ω |
Packaging Dimensions | 2.01 in. × 1.67 in. × 1.73 in. | ||
Weight (Packaging) | 0.4189 lbs. |
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