This is a A large collection of objects for Visio, for schematics and layout diagrams, which I drew over the years I was building amps. The layout parts are accurately sized from specifications where available, and physical measurements where specs were not available. There are also basing diagrams, and lots of pre-drawn circuit pieces for common circuits.
The contents of the two archives is identical, but in slightly
different file formats. parts.zip contains everything in
.vsd file format.
parts-vdx.zip has the same files in the
.vdx format, which can be imported by
Touchdraw, and is what I use for
diagramming now on iOS and OS X.