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AUDIO DESIGN | SMPS| SPICE | MICRO-CONTROLLERS | GEN. ELECTRONICS | SOFTWARE
| Vacuum Tube Audio |
| Vacuum Tube Parts Suppliers |
| Musical Power Supplies, Inc.Vacuum Tube Output & PSU Transformers |
| Audio Design |
| Duncanamps Guitar Amplifiers, Vacuum Tubes, and Design Tools |
| Audio Engineering Society |
| Tubecad - OTL-Amp Design |
| Andrea Ciuffoli - Home Page |
| Steve Bench |
| Guitar Amp Recources |
| Roger Russell's McIntosh History Page |
| The Sound of Wires and other Myths |