This is a large collection of objects for Visio, for amplifier 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 vacuum tube 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.
I'm in the process of manually converting them to native Touchdraw libraries.