Technical Library
The Tropical Fish Technical Library is a collection of original schematics, technical drawings, plans, and reference materials developed through our repair and design work. These materials are intended for technicians, builders, and musicians who want to understand, repair, modify, or build equipment of their own.
KEYBOARDS | instrument amplifiers | wurly amplifiers | parts & tools 
Coming soon
Service manuals & guides
Adding an Effects Loop to the Wurlitzer 112 Amplifier
Modifying a Wurlitzer 112 for an Aux Output or Tremolo Oscillator
Adding a Passive Preamp Output for the Wurlitzer 120/700
Rebuilding the Wurlitzer 120 Amplifier
Troubleshooting the Wurlitzer 140B Amplifier Using the Phono Input
Understanding Wurlitzer 200 Amplifier Revisions
Sourcing Components for Vintage Electronics
Find out about new additions to the technical library
We are in the process of converting our notes and schematics to guides that help people repair, modify, and enjoy their vintage instruments. Sign up below to learn when new material is available in the Technical Library.
If you have a specific question, ask the Wurly Hotline. We’re happy to help troubleshoot, and your submission helps us prioritize which guide to release next.