Mojotone 25th Anniversary 25/50W Guitar Tube Amplifier Kit

* Note: If shown as out of stock, most amp kits ship within 2-3 weeks. Our team will contact you if we anticipate a longer lead time.

Class Type: AB All Tube Amplifier
Output: ~50 Watts
Circuit: 1978-1980 2204
Bias Type: Fixed Bias
Build Time: ~8 hours
Preamp Tubes: ECC83/12AX7 (3)
Output Tube(s): EL34 (2)
Rectifier Tube: None - Solid-state Rectified
Transformers: Power - Plexi / 800 50W (7020850), Output - Plexi / 800 50W (7021850), Choke - Plexi / 800 Choke (7022800)
Hardware: Mojotone 25th Anniversary Small Parts Kit, British 50W Chassis, Front & Rear Faceplates
Enclosure: Limited Edition 25th Anniversary Head shell included with purchase

Disclaimer: Some of the parts contained in this kit are subject to availability.

Mojotone reserves the right to change or substitute any and all of the parts contained in this amplifier kit without advertisement or notification to the buyer. Part substitutions made by Mojotone are guaranteed not to affect the integrity or operation of your amplifier kit. Time estimates listed are from start to finish. If you are new to tube amplifiers, additional time may need to be factored.



When purchasing a kit from Mojotone, you will receive the following documentation.

1. Schematic

2. Wiring Diagram / Layout

Our beginner level kits such as the tweed champ and tweed deluxe include a manual. If you purchase a kit from Mojotone and do not receive these documents, you can obtain copies by emailing tech@mojotone.com or calling 800-927-6656. The Mojotone staff is available Monday through Friday from 8:30 a.m. to 5:00 p.m. EST unless otherwise closed.



Mojotone kits include the best quality parts that are available at the time of purchase. If a substitution is required, our team will use parts that are of equal quality to ensure the integrity of the kit build remains the same.



Building a fully functional amplifier kit is not an easy task. Before building a kit, one should have the ability to properly solder as well as read and understand a schematic and wiring diagram. While we do our very best to ensure all documentation is current, the included documentation is meant to serve as an overall guide to building the amplifier. Simply following the schematic and wiring diagram does not guarantee you will have a fully functional amplifier. In fact, post build troubleshooting is a common issue across all builds.



Our staff is available to assist with basic troubleshooting needs. There are plenty of online videos available that are helpful with most post build issues. Technical staff is available via email by sending a message to tech@mojotone.com. You may also call our sales team to discuss build problems, dial 800-927-6656 and press 1 for sales.



Building a tube amplifier takes time, dedication, resources and most importantly... Skills! The experience of building an amp can come with some frustration, the reward of completing the build is definitely well worth your time. Please review the wiring diagram, schematic and manual (if applicable) prior to making your purchase. Mojotone will not accept any returns on amplifier kits and/or parts that have been assembled, soldered or modified.

25th Anniversary 25 50 Watt British Amp Kit Manual

25th Anniversary Schematic

25th Anniversary Wiring Diagram