Explanation
Overview RG-213 is a full-size 50-ohm coaxial cable that has been a standard in amateur, commercial, and military radio systems for decades. It offers low transmission loss, high power handling, and excellent mechanical durability. Although newer low-loss cables such as LMR-400 are available, RG-213 remains a popular choice because of its rugged construction and dependable performance. Typical Characteristics 50-ohm characteristic impedance. Outside diameter of approximately 0.405 inches (10.3 mm). Stranded center conductor. Excellent mechanical durability. Advantages High power handling. Good flexibility. Excellent outdoor durability. Widely available. Compatible with standard PL-259 connectors. Limitations Heavier than RG-8X. Higher attenuation than LMR-400. Larger diameter than portable cables. Typical Applications Permanent HF stations. Commercial communications. Military installations. Long-term outdoor antenna systems. Applied to Chameleon Products RG-213 is an excellent choice for permanent Chameleon antenna installations where ruggedness and long-term reliability are primary considerations. Related Articles What Is LMR-400 Coax? What Is Feed-Line Loss? What Is Coaxial Cable
The exact result depends on the complete station: frequency, geometry, feed line, matching network, return-current path, environment, operating power, and the reference plane of any measurement. A low SWR establishes an impedance relationship at that point; it does not by itself prove efficiency, radiation pattern, compatibility, or safety.
What to Verify
- Use the newest official product guide or primary service documentation.
- Confirm the exact model, revision, components, configuration, and operating conditions.
- Begin tests at low power and change one variable at a time.
- Do not infer compatibility from connector or thread fit.
Learn Next
- Antenna Selection: A Mission-First Decision Guide
- Engineering Design Tradeoffs in Portable HF Antennas
- Antenna Measurement Reference Planes
- Understanding Common-Mode Current
Source note: Independently synthesized with reference to The ARRL Handbook for Radio Communications, 99th edition (2022), and The ARRL Antenna Book for Radio Communications, 24th edition (2019). Verify changing regulations, services, software, specifications, availability, and safety requirements against current primary sources.
