RG 174 A/U
Construction and cross-section
RG 174 A/U is a very thin coaxial cable with a characteristic impedance of 50 ohms: a stranded center conductor of seven copper-clad steel wires, a solid polyethylene dielectric, a braided shield of tinned copper and a black PVC jacket.
Key data
- Characteristic impedance
- 50 Ω
- Outer diameter
- 2.6 mm
- Layers
- 4
Every cable is the answer to a task.
Layer by layer, to scale.
Short, flexible connections where space is tight: inside equipment, at small antennas and as test leads.
inside
Copper-clad steel
Ø 0.48 mm
7 wires
Solid polyethylene (PE)
Ø over this layer 1.5 mm
Tinned copper
Single wire Ø 0.08 mmassumed
PVC
outsideØ 2.6 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 scaleOuter diameter
2.6 mm
Dielectric
1.5 mm
Center conductor, stranded
0.48 mm
In the picture, the copper-clad steel wires of the center conductor are shown as copper.
To look for yourself, take it in your hand.
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RG 174 A/U as a 3D model, from the same data as every picture on this page.
Loads the model (0.1 MB)
3D model3D model · 101 kB
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.
Sources and assumptions
Center conductor, dielectric and the materials of shield and jacket follow the Belden 8216 datasheet. It describes RG 174; the A/U version was not checked separately. The outer diameter comes from a distributor's catalog. The wire diameter of the braid, its number of wires and its lay length are assumed.
- Belden 8216, manufacturer's datasheet
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