Question: what is the difference between rg58 and rg58a/u?
Answer: RG58/U has a solid center conductor of 20 AWG bare copper. ... RG58A/U has a center conductor of 20 AWG stranded tinned copper. Its capacitance is 30.8 pF per foot. RG58C/U has a center conductor of 20 AWG stranded tinned copper.