Cool Links

Amplifier Sites:
41HZ Audio Chip amp kits from the UK
AudioAmps  Alaska
Audio Electronic Supply  Division of Cary audio design, NC
Amplifier Design Analog Audio Power by DePalma  
Apex Jr  
DIY Audio Amplifier Page  Austrailian Anthony Holton
Duncan's Amp Pages  Free power supply design software, mostly instrument amp oriented 
Essential Audio  100w hybrid kit and SS kit
Hi-Fi Audio Amplifier Design  Class B distortion mod
Elliott Sound Products  One of the very best 
Marchland   Electronic crossover networks, both solid state and vacuum tube, and modular audio amplifiers 
Pass Labs  Home of the ZEN amp
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Speakers:  
Dynaudio  
Solen   
New Foam  Repair and much more  
Speaker Works  
Electrostatic Speaker Information Exchange   
Human Speakers  
Audax  
Sonic Craft  
The Horn Shoppe   4" horn loaded single driver
     Subwoofer:  
        Patman's Sonosub

    Transmission line:
        Transmission Line Org 
        PMC Monitors  
        Subwoofer DIY  

    Software: 
        Linear Team   Speaker box design, and more  
        True Audio   Loudspeaker design software.  Many great links

    Crossover:  
        AMS Enterprises  
        Acoustical Sigma Group  ASGlr5 program download free 
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Vintage Audio:
Chimera Laboratories A resource that helps you enjoy vintage audio. Parts, used, kits, etc.
Vintage electronics  
Vintage Radio & Audio Pages  A resource for collectors and restorers of vintage electronic equiptment.  
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Tubular:
Antique Electronic Supply  
Antique Sound Lab   
Atma-Sphere Music  
Curio Audio Engineering  
Decware  Zen tube amps  
Electro-Harmonix  
Handmade Electronics  Great general parts supplies for the tube DIY
H.H. Scott vintage Hi-Fi stereo archive   
The Parts Connection  Download the catalog, components to complete products.
SAS Audio Labs    Informative theory section.  They sell finished amps, etc.
Tube World  
Vacuum Tube Valley   
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Semiconductor Manufactures:
Burr Brown 
Central Semiconductors
Fairchild 
Hitachi
Motorola
National Semiconductor
Oki Semiconductor
ON Semiconductor   Motorola
Panasonic
Phillips
STMicroelectronics  
Texas Instruments 
Toshiba

    Capacitors:
        Cornell-Dubilier  

    Misc:  
        ALPS Electric USA  
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Transformer Manufactures:
Avel  
Plitron  audio transformers - toroidal transformers - toroids - output transformers - current transformers - power transformer
Hammond  
Signal Transformer  
Toroid  
Prem Magnetics Inc.  
Renco 
Pulse 
Schott 
CoilCraft  
Magnetek  
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Purchasing Tools:
All American Direct  Online purchasing tools   
Electronic Engineers Master Online   Find information on all electronic related parts  
Free Trade Zone  Research and purchase information
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Design Tools:
True Audio  Real time audio spectrum analyzer.
Beige Bag Software  Simulation 
Circuit Maker 2000  All the features of  high-end software at a fraction of the cost. Free student version.
Express PCB  Free board layout 
Electronics Tutorials
Electronics Express  Electronics For Schools, Colleges and Industry.  Extensive links
ENEE 306  Electronics Analysis and Design Lab (Educational Course)  Neil Goldsman, Department of Electrical Engineering, University of Maryland
Global Specialties  ProtoLab 4.0
Techniks  Press-n-Peel Blue Film
Ivex Design Spice, WinDraft, WinBoard
Quest Link #1 info-commerce site. Research components
Electronics 2000  Educational and information CD's
ePanorama  The best view to electronics on the web. 
Basic Car Audio Electronics   Electronics and car audio 101
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Links:
Andrea Ciuffoli  Slow to load, but great links  
Car audio & video links  Very good listing of audio  
Hi Fi Heaven  
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Active Crossover Page
Pass A40 Amp Page