RG58 vs. RG59 Coaxial Cable — Which One Is Right for You?

When it comes to coaxial cables, RG58 and RG59 are two of the most commonly used types in a variety of low-frequency applications. Though they may look similar at first glance, their differences in impedance, conductor size, and intended use make them suitable for very different purposes.

In this article, we’ll break down what sets RG58 cable and RG59 cable apart, compare their performance, and help you choose the right one based on your specific needs.

Understanding RG58 and RG59: What’s the Same?

Before diving into the differences, it's important to understand what these two coaxial cables have in common:

• Both are low-power RF cables, designed for short-range signal transmission.

• They feature polyethylene insulation, which provides good dielectric properties.

• Both come with a PVC outer jacket, offering basic protection against physical damage and environmental exposure.

• Neither is ideal for high-speed or broadband applications due to higher signal loss over long distances.

These similarities make them both suitable for entry-level or budget-conscious applications where high-frequency performance isn’t critical.

Key Differences Between RG58 and RG59

While RG58 and RG59 share some structural traits, their main differences lie in impedance, conductor thickness, and application focus.

Impedance Matters

• RG58 (50Ω): This impedance is ideal for RF signal transmission, especially in environments like ham radio setups, mobile transmitters, and laboratory instruments where signal integrity matters more than distance.

• RG59 (75Ω): The standard impedance for video and TV applications, making it the go-to choice for cable TV, satellite receivers, and CCTV security systems.

When to Choose RG58

If your application involves radio frequency signals, especially in the HF to UHF range, RG58 is likely your best bet. It's widely used in:

• Amateur radio (HAM radio)

• Mobile communication devices

• RF test equipment

• Short-range antenna connections

However, due to its smaller diameter and higher resistance, RG58 is not recommended for long-distance runs, as signal loss becomes significant beyond 50 feet.

When to Choose RG59

RG59 cable shines in analog video signal transmission, particularly for:

• Closed-circuit television (CCTV)

• Cable TV installations

• Satellite dish to receiver connections

• Home AV systems

Its 75Ω impedance matches perfectly with most consumer-grade video equipment, ensuring minimal signal reflection and interference. That said, it's not suitable for digital or high-definition video, where modern alternatives like HD-SDI or fiber are preferred.

Why Not Just Use RG6 Instead?

You may be wondering: why even consider RG58 or RG59 when RG6 is more modern and widely used?

Here’s how RG6 compares:

RG6 offers superior performance for digital TV, satellite, and internet services, especially over longer distances. If you're setting up a new system or need high-bandwidth connectivity, RG6 is usually the better investment.

But if cost is a concern and your application doesn't require high frequencies or long cable runs, RG58 or RG59 can still offer a practical and affordable solution.

Choosing the Right Cable: A Quick Guide

To help you decide between RG58 and RG59, here’s a simple decision framework:

Choose RG58 if:

• Your setup involves radio or RF signals

• You're using ham radio equipment or mobile transceivers

• Signal efficiency matters more than distance

• Budget is tight but you still want decent RF performance

Choose RG59 if:

• You're connecting TV antennas, CCTV cameras, or cable boxes

• You're working with standard definition analog video

• Cost is a major factor and performance demands are modest

Avoid RG58/RG59 if:

• You need high-definition video or broadband internet

• Running cables over long distances

• Using modern digital equipment that expects low signal loss

Final Thoughts

While newer cables like RG6 and fiber optics have taken center stage in many industries, RG58 and RG59 remain relevant in niche but essential applications. Whether you're setting up a ham radio station or installing a basic surveillance system, understanding the strengths and limitations of each will ensure you get the most out of your coaxial cable investment.

Always remember to match the impedance of your cable with your equipment and avoid cheap knock-offs that can degrade performance. Invest in quality from a trusted supplier for reliable results.

Ready to Find the Right Coaxial Cable?

Looking for high-quality RG58 or RG59 coaxial cables for your next project? At Amissiontech, we offer a wide selection of durable, tested coax solutions tailored for RF, CCTV, and analog video applications. Our cables are built to last and perform consistently in real-world conditions.

Contact us today to discuss your requirements and find the perfect coaxial cable for your setup.