electronics

Casio PG-380 Midi Guitar

Several months ago Jason asked me if I could fix a MIDI Guitar. I didn’t have the slightest idea how to fix one, and had only speculative knowledge about how they work, so naturally I said “yeah, sure, piece of cake”. If I’d have known at the time the kind of gear lust this project would create I might have turned him down at the outset. The Casio PG-380 is a guitar that translates the notes you pick on the strings into MIDI Notes.…

Inside The Korg DW-8000

Recently a friend asked how hard it was to replace the CMOS battery in Korg DW-8000 keyboard. I assumed it couldn’t be that hard, looked up what kind of battery it accepted (CR2032) and said “yeah, 5 minute job”. I failed to take into account early 80s circuit construction. Sure, its no Maestro PS-1B, but I certainly discovered some “opportunities” upon cracking open the case… Getting it open is easy enough.…

Make Your Apple Pro Speakers Useful

I am convinced that everything Apple develops fits in to one of two categories: awesome or suck. In the awesome category you have stuff like the iPod, iPhone, and OS X. In the suck category, iTunes, iPhotos, and ahem their font management. Many years ago, when Apple started putting an ‘i’ in front of anything to make it the future, you could get an iMac. This was a neat little machine, underpowered but fun, that my wife bought to handle some graphic design.…

Maestro PS-1B Teardown

A friend of the band recently had a problem with his Maestro PS-1B, a phase shifter from the early 70’s designed by the famous Tom Oberheim, and asked me to take a look at it. Based on the problem, a loud humming at the output with no sign of any other signal, I figured it should be an easy fix. It was probably just a ground fault or a bad output or something, so I took it home with me and cracked it open.…