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Used for low power signal and RF connections. The cable has a characteristic impedance of either 50 or 52 Ω. RG-58 CB coaxial is an affordable choice for basic CB installations. RG-58 (CB cable) has a high loss factor in VHF and UHF frequencies, so it really only is useful in runs less than 50 feet for frequencies above 100 MHz, and 20 feet for frequencies above 400 MHz. Used for low power signal and RF connections. The cable has a characteristic impedance of either 50Ω or 52Ω. RG-58 CB coaxial is an affordable choice for basic CB installations. RG-58 (CB cable) has a high loss factor in VHF and UHF frequencies, so it really only is useful in runs less than 50 feet for frequencies above 100 MHz, and 20 feet for frequencies above 400 MHz. This cable is suitable for 50-75 foot runs in the VHF/UHF range. The cable is considered by some to be obsolete. The cable has a characteristic impedance of 50Ω.RG8x is 50 Ohm cable that is about the same physical size as RG6. It is fairly high loss however and is not that well suited for 70cm except in short runs, however, is suitable for longer runs in the VHF 2m band. RG8 (RG213) is larger 50 Ohm cable that has less loss than RG8X. Considered to be a replacement to RG-8 and much better suited for both VHF and UHF operation. The cable has a characteristic impedance of 50Ω. The specifications for RG-213 are tight as compared to RG-8, increasing the consistency from one manufacturer to the next. RG213 is low loss cable with a non-contaminating jacket.