| All Electronics | Electro-Mechanical and Electronic Parts |
| All Electronics | Electro-Mechanical and Electronic Parts |
| Apex Jr. | Parts |
| Atex Electronics | Electronic Components |
| Audio Electronic Supply | Tube Amplifier Kits and parts |
| Bertech-Kelex | Electronic Components and Solder Products |
| Fair Radio Sales Company Inc. | Parts |
| Farnell | Parts, Tools |
| HI-TEK Electronics | Parts |
| Maplin Electronics | Parts |
| Newark Electronics | Potentiometers, Parts |
| NTE Electronics | Parts |
| Parts Connexion | Parts |
| Reinhöfer Electronic | Tube Amplifier Kits, Tubes, Parts |
| RF Parts Company™ Amateur Radio Catalog | Tubes, Parts |
| Richardson Electronics | Tubes and Parts, Amperex Bugle Boy |
| RS - Components | Parts |
| Schuricht | Tubes, Parts |
| THL Audio | Parts |
| Triode Electronics Online Catalog | Tubes, Parts, Tube Data, Schematics, Links |
| Webtronics | Circuit Specialists - Data Acquisition - Industrial Computers - Test Equipment - Components & Supplies... |
| Welborne Labs | Tube Amplifier Kits, Tubes and Parts |
| Zetex | Semiconductors |