Progress update for the modular guitar amplifier. I’ve finished the power supply. It rectifies a center tap transformer and feeds that into +5, +9, +15, -9, and -15 voltage regulators. Each backplane connector is wired with all five supplies. I’ve only wired up the switching connector and three module slots - I need to get more connectors. Next step is wiring up the signal lines. I set up the front panel with a master output level and input jack. There are two power switches - a master switch for the main module supply, and a secondary power supply switch for the planned power amplifier section slaved into the master.

This is a rack mount enclosure for my modular amplifier project. The height is 3U. This was my first woodworking project, and sparked my interest in woodworking as a hobby. The sides are made from birch plywood, and the edges from oak. This project required a lot of experimentation and learning of technique. This was also my first foray into CAD. Schroff, the company that makes the modular rack system, has full detail models on their sit. I was able to design the rack layout and the surrounding case in Sketchup.