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| American Beauty | Idec Time Delay Relays | Sprague |
| Amperite Timers | Electrovoice | Stancor |
| Amperite Ballasts | Custom Connector Sockets | Sigma Relays |
| Guardian Relays | Switchcraft | |
| Amphenol | GE Photo Lamps | Triad Transformers |
| Centralab | James Millen | Triplett |
| Cinch Jones | Magnecraft | University Sound |
| Clarostat | Micro Switch | Vernitron Beau |
| CTS | Pomona Electronics | Weller-Ungar |
| Dialight | Shure | Xcelite |
| E.F. Johnson | Simpson Electric | Rectifiers |
| Carbon Composition Resistors |
Leecraft Lampholders | Transistors |
| SCR'S | Cornell Dubilier | Zener Diodes |
| H.H. Smith | Kings RF Connectors | G.C. Hardware |