GlassWare
Software - offers programs to assist with the design and building
of tube-based audio gear
IEEE
- The IEEE's technical objectives center on advancing the theory
and practice of electrical, electronics, and computer engineering
and computer science.
Mac's
Advantage Computer Systems(M.A.C.S.) - As an Apple Authorized
Value Added Reseller (VAR), M.A.C.S. offers the complete line
of Apple hardware and software augmented by a wide selection of
software and peripherals selected specifically for engineering
users. M.A.C.S. provides system design consulting, hardware and
software upgrades, AppleCare extended warranty, and many other
services.
Duncan's
Amp Pages - This site is a great source for all things SPICE,
including links to device manufacturers and their SPICE models.
Also check out Duncan's handcrafted spice models for vacuum tubes,
audio amplifiers, and loudspeakers.
SMPS
Power Supplies, Inc - Several examples and models for generating
Bode plots for various stages in a power supply