RG 58 C/U
Construction and cross-section
RG 58 C/U is a thin coaxial cable with a characteristic impedance of 50 ohms: a center conductor of stranded tinned copper, a solid dielectric, a braided shield of tinned copper and a black jacket.
Key data
- Characteristic impedance
- 50 Ω
- Outer diameter
- 4.95 mmassumed
- Layers
- 4
Every cable is the answer to a task.
Layer by layer, to scale.
Short radio-frequency connections at 50 ohms, for example in radio, test and laboratory equipment. The thin construction makes the cable flexible; for long runs and high power, thicker types such as RG 213 are used.
inside
Tinned copper
Ø 0.9 mmassumed
19 wires of 0.18 mm each (assumed)
Ø over this layer 2.94 mmassumed
Tinned copper
Single wire Ø 0.12 mmassumed
outsideØ 4.95 mm
“Assumed” means: the value does not come from a datasheet but is a usual value or one chosen from a reference.
Cross-section
To scale
Outer diameterassumed
4.95 mm
Dielectricassumed
2.94 mm
Center conductor, strandedassumed
0.9 mm
To look for yourself, take it in your hand.
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RG 58 C/U as a 3D model, from the same data as every picture on this page.
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That leaves the question of what the jacket says.
What the name says.
“RG” stands for “Radio Guide” and comes from a US military designation system for radio-frequency cables. The number is a serial number: it says nothing about diameter or characteristic impedance. A letter after the number marks a version of the type, and the suffix “/U” marks general use.
RG 58 C/U has a stranded center conductor.
Sources and assumptions
No datasheet was available for this type. The dimensions are the usual ones for RG 58 C/U and are therefore marked as assumed. The number of wires and the lay length of the braid were chosen from a reference picture.
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- All pictures and films of RG 58 C/U in the gallery
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