Understanding Coaxial Cables: Choosing the Right RG58 and 50 Ohm Cable for Your Antenna

 When it comes to setting up a reliable connection for your radio, TV, or antenna system, coaxial cables play a major role. Whether you’re working on a new antenna setup or upgrading your existing one, the type of coaxial cable you choose can directly impact your signal quality and overall performance.

In this guide, we’ll help you understand what coaxial cables are, why RG58 coax cables and 50 Ohm coaxial cables are so popular, and how to choose the best coax cable for your antenna. Let’s dive in!

What Is a Coaxial Cable?

A coaxial cable, often called coax cable, is a type of electrical cable that transmits radio frequency (RF) signals from one point to another. You’ll find them used in everything from TV antennas and Wi-Fi systems to radio transmitters and security cameras.

A coaxial cable has a few key layers:

  • Inner conductor: Carries the electrical signal

  • Dielectric insulator: Keeps the signal isolated from interference

  • Shielding layer: Protects against external noise or signal loss

  • Outer jacket: Adds durability and protection

This layered design makes coaxial cables reliable for carrying high-frequency signals over long distances with minimal loss — which is why they’re the go-to solution for antennas and communication systems.


Why the Type of Coaxial Cable Matters

Not all coaxial cables are the same. Each type has specific characteristics suited for different applications. Choosing the wrong type can lead to signal loss, poor reception, or even equipment damage.

If you’re using coax cables for antennas, radios, or TVs, it’s important to select the right impedance and construction. The two most common types are 50 Ohm and 75 Ohm coaxial cables.


50 Ohm Coaxial Cables Explained

A 50 Ohm coaxial cable is the industry standard for radio communication, data transmission, and wireless antenna systems. It’s designed to handle power efficiently while maintaining low signal loss, making it ideal for:

  • CB radios

  • VHF/UHF antennas

  • Two-way communication systems

  • RF and networking applications

The 50 Ohm impedance provides an excellent balance between power handling and signal integrity, which is why it’s used in most antenna coaxial cables and professional communication setups.

If you’re looking for high-quality 50 Ohm cables for your setup, Comtek Radio offers a complete range of antenna coaxial cables suited for both home and commercial installations across Australia.


What Is RG58 Coax Cable?

Among all 50 Ohm cables, the RG58 coax cable is one of the most widely used. It’s lightweight, flexible, and perfect for both commercial and home use.

Key Features of RG58 Coax Cable:

  • Impedance: 50 Ohm

  • Frequency range: Works efficiently for VHF, UHF, and data signals

  • Flexibility: Easy to install and route through tight spaces

  • Application: Ideal for radio antennas, testing equipment, and short-run transmission lines

If you need a coax cable for antenna setups in Australia — especially for CB radios or marine communication — RG58 is a reliable and cost-effective choice.


Coaxial Cable for TV Antennas

When it comes to TV reception, coaxial cables are essential. However, TV systems usually use 75 Ohm coaxial cables because they are optimized for video and broadcast signals.

Why Coaxial Cables Matter for TV Antennas:

  • They reduce interference for clearer picture and sound

  • They maintain consistent signal strength over long distances

  • They are compatible with most set-top boxes and digital antennas

If your goal is to improve TV reception or install a new antenna, make sure to use a coaxial cable for TV antenna designed for Australian broadcast frequencies.


Choosing the Right Coax Cable for Your Antenna

When selecting the perfect coax cable for antenna setups, consider these factors:

  1. Impedance:

    • 50 Ohm → Best for radios and wireless systems

    • 75 Ohm → Best for TV antennas and video applications

  2. Length:
    The longer the cable, the higher the signal loss. Try to keep your cable run as short as possible.

  3. Shielding:
    Look for cables with double or quad shielding to protect against interference, especially in urban areas.

  4. Flexibility and durability:
    If your installation involves tight bends or outdoor exposure, choose a cable with a strong outer jacket and high flexibility.

At Comtek Radio, we provide premium-quality coaxial cables designed for Australian conditions — perfect for radio, communication, and TV setups. You can explore our full range of RG58 coax cables, 50 Ohm coaxial cables, and more online.


Why Choose Comtek Radio for Coaxial Cables in Australia

For over two decades, Comtek Radio has been a trusted name in communication accessories across Australia. Whether you need a 50 Ohm coaxial cable, RG58 cable, or a coaxial cable for TV antenna, we provide reliable products that ensure excellent performance and signal clarity.

Why Australian customers trust Comtek Radio:

  • High-quality, durable cables built for local conditions

  • Expert advice and technical support

  • Competitive pricing and fast delivery across Australia

  • Trusted by professionals in radio, CB, and antenna installations

When you need dependable communication accessories, choose Comtek Radio — Australia’s one-stop shop for antenna coaxial cables and accessories.


Frequently Asked Questions (FAQ)

Q1: What is the difference between RG58 and RG59 coaxial cables?
A: RG58 is a 50 Ohm cable commonly used for radio and data communication, while RG59 is a 75 Ohm cable used mainly for TV and video applications.

Q2: Can I use RG58 coax cable for my TV antenna?
A: It’s not recommended. TV antennas work best with 75 Ohm cables such as RG59 or RG6, as they’re designed for video signal transmission.

Q3: How long can a coaxial cable be before losing signal?
A: Signal loss increases with length. For most home antenna systems, try to keep coaxial cables under 30 metres to maintain strong signal quality.

Q4: Is 50 Ohm better than 75 Ohm coaxial cable?
A: Neither is “better” — they’re simply made for different purposes. 50 Ohm cables are best for radio frequency and antenna transmission, while 75 Ohm cables are ideal for TV and video.

Q5: Where can I buy coaxial cables in Australia?
A: You can purchase high-quality coaxial cables online from Comtek Radio, with fast shipping Australia-wide.


Final Thoughts

Understanding the difference between coaxial cable types — such as RG58 coax cable, 50 Ohm coaxial cable, and coaxial cable for TV antenna — can make a big difference in your signal quality and overall setup performance.

Whether you’re building a new antenna system or upgrading your current one, always choose high-quality cables that suit your exact application.

If you’re in Australia and looking for reliable coaxial cables built to last, explore the full range at Comtek Radio – Coaxial Cables & Accessories.


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