Make
Cobra
Model
21XLR
Cobra 21XLR
Overview
The Cobra 21XLR is a 40-channel phase-locked loop synthesized mobile AM CB transceiver produced by Dynascan Corporation.
Technical Specifications
| Attribute | Details |
|---|---|
| Manufacturer | COBRA |
| Model | 21XLR |
| Product Category | Citizens Band (CB) Transceiver |
| Years Manufactured | 1977–1979 |
| Channels | 40 Channels |
| Frequency Control | PLL Synthesizer |
Physical Description
Compact steel case with chrome trim, green digital LED channel display, analog signal meter, and front 4-pin microphone socket.
History
Advertised starting in January 1977 at $149.95 to support the expanded 40-channel Class D service, utilizing digital frequency synthesis.
Mic Wiring
Pin 1 – Shield / Ground
Pin 1 – Switch Line
Pin 2 – Mic Audio
Pin 3 – RX
Pin 4 – TX / PTT