Blackface Champ Output Transformer 125A35A

Weight: 0.6 lb
Sale Unit: Piece

In Stock


Replacement for Fender part numbers 125A35A, 125A3A, 022905

All Mojotone Transformers are made in the USA.
As used in the Gibson GA5 Les Paul JR. A great upgrade for the Epiphone Valve Jr. Also Used in our Mojotone Vibrochamp, Tweed Champ and Tweed Princeton kits.

Please use caution when referencing these wiring diagrams. Mojo transformers have undergone various changes over the years and these wiring diagrams are meant to aid in the purchasing process and represent current production only. These diagrams may not necessarily correspond to previous models. Mojo is not liable for damage that may result from the use of these diagrams. Please contact us if you are unsure about anything relating to Mojo transformers or if you need to verify data on a specific transformer you have been shipped, especially if you did not purchase the transformer within the past six months.

Output Taps: 4/8 ohm
Primary Impedance: 7,000 Ohms

2(W) x 1 5/8"(H) x 1 3/4"(D
X Mount with 2-7/16" 2-Hole Mounting centers

Paper bobbin / high-grade steel

Note on installation: Since the primary is a single coil of wire, the phase relative to the secondary is difficult to determine during manufacturing. As a result, there is a good chance the primary will be out of phase with a negative feedback circuit. This will cause an immediate high frequency oscillation. To solve the issue, simply swap the locations of the primary lead connections. Start with blue on the plate, and if it is out of phase, swap it with the red.

Ratings & Reviews

2 reviews

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4/12/2024 3:26 am

Super Single Ended

by Mark

Super output transformer, sounds great in a "big champ" with single or parallel tubes. Physically it's about the same size as a Deluxe Reverb output.

2/17/2021 1:42 pm

Very nice

by anonymous

Very nice little output transformer. Measured up to 30 KHz bandwith in a single ended amp.