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| Experience Electronics | Tube Amplifier Kits, Parts, Transformers |
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| Hinkel-Elektronik | Parts |
| Main Electronics Receiving Tube Page | Tubes, Parts |
| Maplin Electronics | Parts |
| Newark Electronics | Potentiometers, Parts |
| Parts Connexion | Parts |
| Parts Express | Electronics and more |
| Reinhöfer Electronic | Tube Amplifier Kits, Tubes, Parts |
| RF Parts Company™ Amateur Radio Catalog | Tubes, Parts |
| RF Parts Company™ Amateur Radio Catalog | Tubes, Parts |
| RS - Components | Parts |
| Torres Amps | Tube Guitar Amplifiers, Kits, Parts, Tubes |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |