Understanding Coaxial cables: RG6 vs RG59 Differences

Choosing the right coaxial cable matters for TV, satellite, CCTV, and broadband installations. RG6 and RG59 are the two most common types you’ll encounter; they look similar but perform differently depending on frequency, distance, and installation environment.

This guide explains the technical differences, real-world performance, installation considerations, and when to use each cable so you can make a practical, confident choice.

What are RG6 and RG59?

RG59 and RG6 are coaxial cables defined by conductor size, dielectric, and shielding. RG59 has a thinner center conductor and is typically used for lower-frequency signals such as short-run analog video. RG6 has a thicker conductor and better shielding, making it the standard for modern digital TV, satellite, and many broadband applications.

If you need a quick example of a ready-made coaxial lead for TV installations, consider a typical TV aerial lead such as the 1m TV Aerial Cable with Right Angle Plug Adapter, which shows common connectors and build quality used in consumer installs.

Cable construction and shielding

Key construction elements that affect performance are:

• Center conductor diameter: RG6 typically uses a larger conductor (better low-loss behaviour at higher frequencies).
• Dielectric: thicker, higher-quality dielectric reduces signal loss and preserves impedance.
• Shielding: RG6 commonly uses dual shields (foil + braid) or quad-shield for urban/EMI-prone environments; RG59 often has lighter shielding.

For popular cable and accessory choices during installation projects, check current stock and trending items on the site’s Trending page.

Signal performance and bandwidth

Performance differences become clear at higher frequencies. RG6 supports higher frequency ranges and exhibits lower attenuation per metre than RG59. That makes RG6 a better choice for:

• Digital TV and satellite signals
• High-definition video over longer runs
• Distribution systems with splitters where signal level must be preserved

RG59 can be adequate for short analog video runs or legacy equipment, but it will show higher loss at GHz frequencies and may degrade picture or data quality over greater distances.

Distance and attenuation: when RG59 fails

Attenuation (signal loss) increases with frequency and cable length. A short RG59 run (a few metres) may work fine for analogue or low-frequency video, but past tens of metres its loss becomes significant compared with RG6. If you need to push signals over long runs, consider higher-performing media like fibre for near-zero loss over long distances. See the options under Fiber Optic cables when planning long, high-bandwidth distributions or backbone links.

Installation considerations: connectors, splitters, and outdoor use

Common connectors for both RG6 and RG59 are F-type for consumer TV/satellite and BNC for professional video. Use compression connectors rather than simple push-on types for the best weatherproofing and impedance match. Weatherproof boots and sealant are recommended for outdoor terminations.

For outdoor runs where durability and UV/water resistance matter, installers often compare coax with purpose-built outdoor Ethernet like direct-burial Cat6. If the project can use IP cameras or IPTV instead of coax, an outdoor-rated Cat6 product—such as the Outdoor Cat 6 Ethernet Cable 60m—may offer a more robust solution for long, exposed runs.

When to choose RG6 vs RG59 (practical rules)

Use RG6 when:

• You’re running digital TV, satellite, or HD over any moderate distance
• The system uses splitters or multiple outlets
• You need better shielding against interference

Use RG59 when:

• Runs are very short (a few metres) for analogue signals
• Cost is a primary concern for legacy low-frequency installations

If you’re designing a networked video solution (IP cameras, IPTV), structured cabling like Cat6 patching and PoE equipment can be a better long-term choice, especially where power over the same cable is desired.

Testing and quality control

After termination, always test coax for continuity, impedance mismatch, and signal level. A quality return-loss or VSWR test identifies poor connectors or damaged cable. For installations tying coax into a broader structured cabling system, maintain clear labelling and use appropriate patch panels and leads; consider stocking common patch leads and adapters from the Patch Cords range to simplify transitions between media.

Cost, availability, and future-proofing

RG6 is slightly more expensive than RG59 but provides better performance and longer useful life. For new installs, RG6 is generally the safer, more future-proof choice. For conversions to IP-based services or when very long distances or high bandwidth are required, plan to combine coax runs with fibre or structured Cat6 solutions depending on the application.

Checklist: Choosing and installing the right coax

• Confirm signal type (analog, digital, satellite, IP) and frequency requirements.
• Estimate maximum run length and apply attenuation charts—choose RG6 for longer runs.
• Select shielding level: dual-shield or quad-shield for noisy environments.
• Use compression F-connectors for weatherproof outdoor terminations.
• Test every run for continuity, impedance, and signal level after termination.
• Consider structured cabling or fibre for future expansion or very long distances.

FAQ

Q: Can I replace RG59 with RG6 on an existing run?
A: Physically replacing is straightforward if access allows. RG6 performs better; ensure connectors and adapters match the equipment.

Q: Does RG6 always use solid copper?
A: Quality RG6 uses a solid copper or copper-clad centre conductor. Beware cheaper RG6 versions with inferior conductors—check specs.

Q: Is quad-shield RG6 necessary?
A: Quad-shield provides extra protection against EMI in high-interference areas or when the cable runs near heavy electrical equipment. For typical home installs, dual-shield RG6 is often sufficient.

Q: Can coax carry power to devices like IP cameras?
A: Standard coax does not carry PoE. For IP cameras, use PoE-enabled Ethernet (Cat5e/Cat6) or separate power runs.

Q: When should I consider fibre instead of coax?
A: Choose fibre for very long distances, high bandwidth requirements, or when minimal signal loss is critical. Fibre is recommended for backbone links and future-proof high-speed distribution.

Q: Where can I find accessories and leads for mixed systems?
A: Stock common leads, adapters, and converters to handle transitions between coax, copper, and fibre. If you’re integrating with structured networks, add appropriate patch leads and converters early in the design.

Conclusion

For most modern TV, satellite and digital-video installations choose RG6 for its lower loss and better shielding. Use RG59 only for very short, legacy analogue runs. For long-distance or high-bandwidth needs consider structured cabling or fibre solutions. Practical planning, correct connectors, and post-install testing will deliver reliable results.