What is the electrical difference between RG-58 and RG-213 coaxial cable?
Answer Options
A) There is no significant difference between the two types
B) RG-58 cable has two shields
C) RG-213 cable has less loss at a given frequency
D) RG-58 cable can handle higher power levels
Correct Answer: C
Explanation
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DX engineering provides a table of various coaxial cable comparisons. See link to Coax Spec Chart Unfortunately, this is one of those questions that just requires a memorized answer. Most everyone recognizes “RG-58” (0.195” dia.) as the most standard coaxial 50-ohm cable. RG-8 (0.405” dia.) is also a common 50-ohm cable but thicker and lower loss. RG-213 (0.405” dia.) is a higher quality “look alike” to RG-8.
In general, thicker coaxial cables have lower loss at a given frequency and are also rated for higher voltage (read “more power”).