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Home / Lighting / Driving & light bars

RG58AU low loss coaxial cable, 50 ohm, 5mm diameterRG58AU low loss coaxial cable, 50 ohm, 5mm diameter — cable coil detail

Elevate Automotive

RG58AU Low Loss Coaxial Cable, 50Ω 5mm

RG58AU

RG58AU-grade 50Ω low-loss coaxial antenna cable, 5mm diameter, sold by the metre for UHF, VHF and RF radio feedline runs.

Impedance50Ω nominal
Outer Ø5mm
SignalRG-58A/U

$4.50

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A 50Ω RG58AU low-loss coaxial cable, 5mm in diameter, sold by the metre as the antenna feedline between a UHF or VHF radio and its aerial. Runs between a UHF CB head unit and roof whip in 4WDs and trucks, between a VHF marine radio and masthead on boats, and between workshop test benches and fixed base-station whips.

Multi-strand centre conductor carries the RG-58A/U stranded designation for flexible routing through pillars, roof linings and dash panels. Sized for standard RG58-pattern connectors (PL259, BNC, FME or TNC), crimped or soldered on each end to match the radio and antenna.

Sold bare with no connectors fitted. Pick connectors to match the gear on each end, and keep the run as short as the install allows so signal loss stays low.

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  • 50Ω impedance — matched to UHF and VHF radio gear
  • 5mm diameter — flexible for tight dash and roof routing
  • Multi-strand centre — RG-58A/U stranded for flex
  • Low-loss coax — less signal loss than standard-grade
  • Sold per metre — cut exactly the length you need

Cable

Type: RG58AU low-loss coax

Impedance: 50Ω nominal

Outer diameter: 5mm

Centre conductor: Multi-strand copper

Outer diameter5mm
Universal
Workshop consumable sold by the metre. Antenna feedline between a UHF CB, VHF marine or two-way RF radio and its aerial, used across 4WDs, trucks, caravans, boats, workshop test benches and fixed base stations. Install is whatever route carries the cable between the radio and the antenna.
RF antenna feedline (signal only)
Not a power cable, carries no DC current

Q: What does "RG58AU" actually mean?
RG-58A/U is the US MIL-spec cable designation. "RG-58" names the cable family, "A" marks a design revision (a multi-strand centre conductor for better flexibility), and "U" means it meets the general-purpose Universal spec. Australian suppliers often drop the slash and write it "RG58AU", but it is not an Australian-specific designation, it is the same cable family used worldwide for 50Ω UHF and VHF radio feedlines.

Q: What does "50Ω impedance" mean and why does it matter?
Impedance describes how the cable resists the flow of a radio signal along its length. The radio, cable and antenna all need to be matched to the same impedance. 50Ω is the standard for UHF and VHF two-way radio gear; running the wrong impedance costs signal and can stress the radio's output stage.

Q: What does "low loss" mean, and how much signal does this cable actually lose?
All coax loses some signal as heat over distance. "Low loss" means less loss than a standard-grade cable of the same size. For a typical antenna lead a few metres long the loss is small; the longer the run between the radio and the antenna, the more it adds up. Keep the run as short as the install allows.

Q: Is this suitable for UHF CB radio?
Yes. Australian UHF CB runs on the 476–477MHz band, and this cable's 50Ω impedance and low-loss construction are exactly what UHF CB antenna feedlines are built to.

Q: What connectors work with this cable?
It is sized for standard RG58 connectors: PL259, BNC, FME and TNC are all common. Pick the connector that matches the radio and antenna gear at each end.

Q: Does this cable come with connectors fitted?
No. It is sold as bare cable so it can be cut to length first. Connectors are crimped or soldered on afterwards to suit the radio and antenna, and are sold separately.

Q: Can I order this in a continuous roll?
Yes. It is cut to length per metre and supplied as one unbroken run unless you ask for it cut into separate pieces.

Q: Does running this cable near power wiring affect the signal?
Keep it away from power cables and sharp edges where practical. A coaxial cable is shielded, but routing it hard against a noisy power feed (inverter, DC-DC charger) can still introduce interference, and abrasion against sharp edges over time can damage the jacket and reduce performance.

Q: Does cable length affect how well my radio performs?
Yes. Longer runs lose more signal. Keep the run as short and direct as practical between the radio and antenna. A few extra metres on a low-loss cable like this makes little difference, but doubling or tripling the length starts to add up.

Q: Can I use TV coax (RG6, 75Ω) instead for a UHF antenna run?
No. UHF and VHF radio gear is built for a 50Ω feedline; RG6 is 75Ω and intended for TV antennas. Using the wrong impedance costs signal and can stress the radio's output stage. Stick with 50Ω coax like RG58 for UHF and VHF antenna runs.

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