Make
GM
Delco
General Motors
Model
CBD-12
Sams #
CB-111
Overview
The General Motors CBD-12 (7898540) is a Delco-built mobile CB transceiver produced in the 1970s. It is a crystal-controlled, low channel-count unit intended for basic two-way communication in vehicles.
Technical Specifications
| Parameter | Details |
|---|---|
| Channels | 12 |
| Frequency Range | 26.965 – 27.105 MHz |
| Output Power | 4 watts AM |
| Frequency Control | Crystal controlled |
| Modulation | AM |
| Power Requirement | 12 VDC |
| Antenna | External mobile antenna |
Physical Description
The CBD-12 is a compact mobile radio housed in a metal chassis with a simple Delco front panel. It is designed for under-dash mounting using a bracket. The front panel includes a rotary channel selector, combined volume and squelch control, and a microphone connector. A handheld push-to-talk microphone is used for transmit audio.
The unit uses external wiring for power and antenna connection and operates independently of the vehicle’s broadcast radio system.
History
The CBD-12 was produced during the early CB radio adoption period in the 1970s, when lower channel-count radios were still in use prior to the widespread transition to 23-channel equipment. Its crystal-controlled design reflects standard technology of that period.
As CB radio standards expanded and PLL-synthesized designs became common, earlier crystal-controlled radios like the CBD-12 were phased out.