AE-237 Late Summer / Early Fall Wrap 2010

edaudio 'at' tangible-technology.com

I would generlaly advise those who are interested in fully realizing their most awesome Active DI's to wait until the new boards are available as the upgrade will be infinitely easier. 

That said, below are images, block diagrams and schematics of the essential mic preamp details, if only to satisfy your curiosity - while electronics are still fresh in your minds...

• Rear Panel XLR input connector wiring and phantom power distribution
• 48 volt zener clamp from power supply board
• Front panel switch wiring: 20dB pad, Phantom Power Switch (not visible, Input Impedance / 6dB switch
• JFET Block Diagram: details how to wire phase reverse and output pad

Also, there are many Vari-Fi DIs out there - you might ask any students who built them if they are using theirs and either want to upgrade their own or sell them to you for a good price...

Schematic Brain Melt:

Typical schematics are barely readable which is why you want to study the legibles ones. Click on the schematic for a pdf version...