RG58A

RG58A is a coaxial cable commonly used for radio frequency (RF) applications, particularly in amateur radio, military communications, and other RF systems. It is a type of flexible coaxial cable designed to transmit high-frequency signals with minimal loss. The "RG" designation refers to the Radio Guide specification, a series of cables standardized by the U.S. military for RF applications.

RG58A is a variation of the original RG58 cable, with slight modifications to improve performance or durability. It features a solid copper conductor surrounded by a dielectric insulator, typically polyethylene or foam polyethylene, which helps reduce signal attenuation. The outer conductor is a braided copper shield, providing electromagnetic interference (EMI) protection. The cable is then covered with a protective outer jacket, usually made of polyvinyl chloride (PVC) or another durable material.

One of the key advantages of RG58A is its balance between flexibility and signal integrity. It is suitable for applications requiring moderate power handling and moderate bandwidth, such as VHF (Very High Frequency) and UHF (Ultra High Frequency) communications. The cable’s impedance is typically 50 ohms, making it compatible with most RF equipment designed for this standard.

RG58A is often used in amateur radio setups for antenna connections, as well as in test equipment, wireless networking, and other RF-related applications. Its compact size and flexibility make it ideal for installations where space is limited or where the cable needs to bend frequently. However, for high-power or high-frequency applications, alternative cables with lower loss characteristics, such as LMR-400 or hardline coaxial cables, may be preferred.

The cable’s specifications, including its attenuation, operating frequency range, and environmental resistance, can vary slightly depending on the manufacturer. Proper handling, including avoiding sharp bends and excessive stretching, is recommended to maintain performance and prevent damage.