=== Attenuation chart === Coax Cable Signal Loss (Attenuation) in dB per 100ft* ^^ Loss ^^ RG-174 ^^ RG-58 ^^ RG-8X ^^ RG-213 ^^ RG-6 ^^ RG-11 ^^ RF-9914 ^^ RF-9913 ^^ ^^ 1MHz || 1.9dB || 0.4dB || 0.5dB || 0.2dB || 0.2dB || 0.2dB || 0.3dB || 0.2dB || ^^ 10MHz || 3.3dB || 1.4dB || 1.0dB || 0.6dB || 0.6dB || 0.4dB || 0.5dB || 0.4dB || ^^ 50MHz || 6.6dB || 3.3dB || 2.5dB || 1.6dB || 1.4dB || 1.0dB || 1.1dB || 0.9dB || ^^ 100MHz || 8.9dB || 4.9dB || 3.6dB || 2.2dB || 2.0dB || 1.6dB || 1.5dB || 1.4dB || ^^ 200MHz || 11.9dB || 7.3dB || 5.4dB || 3.3dB || 2.8dB || 2.3dB || 2.0dB || 1.8dB || ^^ 400MHz || 17.3 B || 11.2dB || 7.9dB || 4.8dB || 4.3dB || 3.5dB || 2.9dB || 2.6dB || ^^ 700MHz || 26.0dB || 16.9dB || 11.0dB || 6.6dB || 5.6dB || 4.7dB || 3.8dB || 3.6dB || ^^ 900MHz || 27.9 B || 20.1dB || 12.6dB || 7.7dB || 6.0dB || 5.4dB || 4.9dB || 4.2dB || ^^ 1GHz || 32.0dB || 21.5dB || 13.5dB || 8.3dB || 6.1dB || 5.6dB || 5.3dB || 4.5dB || ^^ Imped || 50ohm || 50ohm || 50ohm || 50ohm || 75ohm || 75ohm || 50ohm || 50ohm || Note: Coax losses shown above are for 100 feet lengths. Loss is a length multiplier, so a 200 ft length would have twice the loss shown above and a 50 ft length would have half the loss. This multiplier factor is why you should keep cable installation lengths between radios and antennas as short as practical! ^^ ^^ LMR-1200 ^^ LMR-900 ^^ LMR-600 ^^ 1/2” Superflex ^^ LMR-400 ^^ Belden 9913F7 ^^ 9914 ^^ RG214, RG213 ^^ LMR-240 ^^ Belden RG8X ^^ LMR-200 ^^ LMR-195 ^^ RG-58/U ^^ ^^ Frequency/Size ^^ 1.200” ^^ 0.870” ^^ 0.590” ^^ 0.520” ^^ 0.405” ^^ 0.405” ^^ 0.400” ^^ 0.405” ^^ 0.240” ^^ 0.242” ^^ 0.195” ^^ 0.195” ^^ 0.195” ^^ ^^ 30 MHz || 0.209 || 0.288 || 0.421 || 0.561 || 0.7 || 0.8 || 0.8 || 1.2 || 1.3 || 2.0 || 1.8 || 1.8 || 2.5 || ^^ 50 MHz || 0.272 || 0.374 || 0.547 || 0.730 || 0.9 || 1.1 || 1.1 || 1.6 || 1.7 || 2.5 || 2.3 || 2.3 || 3.1 || ^^ 150 MHz || 0.481 || 0.658 || 0.964 || 1.29 || 1.5 || 1.7 || 1.7 || 2.8 || 3.0 || 4.7 || 3.9 || 4.0 || 6.2 || ^^ 220 MHz || 0.589 || 0.803 || 1.18 || 1.58 || 1.8 || 2.1 || 2.1 || 3.5 || 3.7 || 6.0 || 4.8 || 4.8 || 7.4 || ^^ 450 MHz || 0.864 || 1.17 || 1.72 || 2.32 || 2.7 || 3.1 || 3.1 || 5.2 || 5.3 || 8.6 || 6.9 || 7.0 || 10.6 || ^^ 900 MHz || 1.27 || 1.70 || 2.50 || 3.41 || 3.9 || 4.4 || 4.5 || 8.0 || 7.6 || 12.8 || 9.9 || 9.9 || 16.5 || ^^ 1,500 MHz || 1.69 || 2.24 || 3.31 || 4.57 || 5.1 || 6.0 || || || 9.9 || || 12.7 || 12.9 || || Attenuation of Coaxial Transmission Lines in the VHF/UHF/Microwave Amateur and ISM Bands in dB/ 100 ft (dB/ 100 m) ^^ Cable Type ^^ 144 MHz ^^ 220 MHz ^^ 450 MHz ^^ 915 MHz ^^ 1.2 GHz ^^ 2.4 GHz ^^ 5.8 GHz ^^ ^^ RG-58 || 6.2 (20.3) || 7.4 (24.3) || 10.6 (34.8) || 16.5 (54.1) || 21.1 (69.2) || 32.2 (105.6) || 51.6 (169.2) || ^^ RG-8X || 4.7 (15.4) || 6.0 (19.7) || 8.6 (28.2) || 12.8 (42.0) || 15.9 (52.8) || 23.1 (75.8) || 40.9 (134.2) || ^^ LMR-240 || 3.0 (9.8) || 3.7 (12.1) || 5.3 (17.4) || 7.6 (24.9) || 9.2 (30.2) || 12.9 (42.3) || 20.4 (66.9) || ^^ RG-213/214 || 2.8 (9.2) || 3.5 (11.5) || 5.2 (17.1) || 8.0 (26.2) || 10.1 (33.1) || 15.2 (49.9) || 28.6 (93.8) || ^^ 9913 || 1.6 (5.2) || 1.9 (6.2) || 2.8 (9.2) || 4.2 (13.8) || 5.2 (17.1) || 7.7 (25.3) || 13.8 (45.3) || ^^ LMR-400 || 1.5 (4.9) || 1.8 (5.9) || 2.7 (8.9) || 3.9 (12.8) || 4.8 (15.7) || 6.8 (22.3) || 10.8 (35.4) || ^^ 3/8" LDF || 1.3 (4.3) || 1.6 (5.2) || 2.3 (7.5) || 3.4 (11.2) || 4.2 (13.8) || 5.9 (19.4) || 8.1 (26.6) || ^^ LMR-600 || 0.96 (3.1) || 1.2 (3.9) || 1.7 (5.6) || 2.5 (8.2) || 3.1 (10.2) || 4.4 (14.4) || 7.3 (23.9) || ^^ 1/2" LDF || 0.85 (2.8) || 1.1 (3.6) || 1.5 (4.9) || 2.2 (7.2) || 2.7 (8.9) || 3.9 (12.8) || 6.6 (21.6) || ^^ 7/8" LDF || 0.46 (1.5) || 0.56 (2.1) || 0.83 (2.7) || 1.2 (3.9) || 1.5 (4.9) || 2.3 (7.5) || 3.8 (12.5) || ^^ 1 1/4" LDF || 0.34 (1.1) || 0.42 (1.4) || 0.62 (2.0) || 0.91 (3.0) || 1.1 (3.6) || 1.7 (5.6) || 2.8 (9.2) || ^^ 1 5/8" LDF || 0.28 (0.92) || 0.35 (1.1) || 0.52 (1.7) || 0.77 (2.5) || 0.96 (3.1) || 1.4 (4.6) || 2.5 (8.2) ||