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== Attenuation Charts ====Attenuation Charts== ===Common Cable Attenuation Chart====== Common Cable Attenuation Chart ====== VHF / UHF Attenuation Chart ======VHF / UHF / GHz Attenuation Chart===* dB loss per 100 ft{| border="3" bgcolor="#BFD8D8"{| border="3" (20.3)(24.3)(34.8)(54.1)(69.2)(105.6)(169.2)(15.4)(19.7)(28.2)(42.0)(52.8)(75.8)(134.2)(9.8)(12.1)(17.4)(24.9)(30.2)(42.3)(66.9)(9.2)(11.5)(17.1)(26.2)(33.1)(49.9)(93.8)(5.2)(6.2)(9.2)(13.8)(17.1)(25.3)(45.3)(4.9)(5.9)(8.9)(12.8)(15.7)(22.3)(35.4)(4.3)(5.2)(7.5)(11.2)(13.8)(19.4)(26.6)(3.1)(3.9)(5.6)(8.2)(10.2)(14.4)(23.9)| width="122" | '''1/2" LDF'''| width="122" | '''1/2" LDF (Heliax)'''(2.8)(3.6)(4.9)(7.2)(8.9)(12.8)(21.6)| width="122" | '''7/8" LDF'''| width="122" | '''7/8" LDF (Heliax)'''(1.5)(2.1)(2.7)(3.9)(4.9)(7.5)(12.5)| width="122" | '''1 1/4" LDF'''| width="122" | '''1 1/4" LDF (Heliax)'''(1.1)(1.4)(2.0)(3.0)(3.6)(5.6)(9.2)| width="122" | '''1 5/8" LDF'''| width="122" | '''1 5/8" LDF (Heliax)'''(0.92)(1.1)(1.7)(2.5)(3.1)(4.6)(8.2)==Cable Options to Antenna==== RG-58 =====RG-58===thin, 50Ω, somewhat lossyBecause it is flexible and thin, this cable is often used for vehicle installations. Suitable for vehicle installs for CB radio and HF amateur radio.In ham radio you typically only see RG-58 being used for short jumper connections, such as 3ft between an SWR/Power meter and a transceiver, or an antenna matching unit.== RG-8/U =====RG-8x / Mini-8===thin,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.This cable is .242" diameter with a #16 AWG stranded center conductor and a foam dielectric.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. ===RG-8/U===thick, 50Ω, low loss == RG-213 ==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. This cable is .405" in diameter with a #13 AWG center conductor and a solid polyethylene dielectric. * thick, 50Ω, low lossRG8x 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.===RG-213===== UR-67 ==* thick, 50Ω, lower loss RG-213 is pretty much the standard in ham radio coaxial cable for HF, and short runs of VHF due to price and general application. It is 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. Commonly used for Amateur Radio. ===UR-67=== ===LMR-400===thick, 50Ω, very low loss == LMR-400 ==== Belden 9913 ==Commonly used for Amateur Radio for 2m, 70cm, and above frequency ===Belden 9913===thick, 50Ω, very low loss His similar attenuation characteristics to LMR-400. People tend to prefer LMR-400 as a replacement for Belden 9913. Some reasons include that Belden 9913 has a solid center conductor making it less flexible and Belden 9913 is more moisture prone. The 9913 dielectric is somewhat more fragile than the cellular polyethylene LMR400 dielectric, however, Belden 9913F also has a polyethylene foam dielectric. * .405" diameter with a #10AWG center conductor ==Jumper (Patch) Cable==From the transceiver to an antenna matching unit, swr, power meter, or linear amplifier, the use of a short, flexible jumper cable is needed. These tend to have higher attenuation, the tradeoff being flexibility for signal loss. At lengths of 3ft to 6ft the attenuation is negligible. ===RG-58===CB and jumper for ham radio. Lossy. ===LMR-240, 200 and 195===Because LMR-400 is thick and can put a lot of stress on the connectors of equipment, thinner more flexible alternatives are preferred for jumper use. LMR-195 is thin and flexible. RFC195 is LMR-195 equivalent and suitable for jumpers on 2m and 70cm application in lengths of 6ft or less. LMR-195 has less attenuation than does RG-58U at all frequencies. At CB frequencies it is 1.8 vs 2.5 and at 70cm ham it is 4.8 vs 7.4. LMR-195 has lower loss than other RG ‘58’ type cables. This is achieved through the use of a high velocity dielectric and a bonded aluminum tape outer conductor.