| Atex Electronics | Electronic Components |
| Audio Electronic Supply | Tube Amplifier Kits and parts |
| Bertech-Kelex | Electronic Components and Solder Products |
| Experience Electronics | Tube Amplifier Kits, Parts, Transformers |
| Farnell | Parts, Tools |
| Gabe's Tubes 'n' Stuff | Information and DIY Tube Amplifiers |
| General Semiconductor Inc. | Diodes, Voltage Regulators |
| Newark Electronics | Potentiometers, Parts |
| Parts Connexion | Parts |
| RF Parts Company™ Amateur Radio Catalog | Tubes, Parts |
| Richardson Electronics | Tubes and Parts, Amperex Bugle Boy |
| RS - Components | Parts |
| Schuricht | Tubes, Parts |
| Vector - Russian Electronics | Tubes, Nixie Tubes, Parts |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |