The following charts measure the attenuation (loss) of different types of coax at 50 and 100 foot lengths for each of the amateur radio bands. Attenuation is measured in dB.
50′ |
160 |
80 |
40 |
20 |
15 |
10 |
6 |
2 |
70 |
RG-8 |
0.1 |
0.2 |
0.2 |
0.4 |
0.4 |
0.5 |
0.7 |
1.2 |
2.2 |
RG-8/U |
0.1 |
0.2 |
0.2 |
0.4 |
0.4 |
0.5 |
0.7 |
1.2 |
2.2 |
RG-8X |
0.2 |
0.3 |
0.5 |
0.7 |
0.8 |
1.0 |
1.3 |
2.2 |
4.0 |
RG-58 |
0.3 |
0.4 |
0.6 |
0.8 |
1.0 |
1.2 |
1.6 |
2.8 |
4.9 |
RG-59 |
0.2 |
0.3 |
0.4 |
0.6 |
0.8 |
0.9 |
1.2 |
2.0 |
3.6 |
RG-142 |
0.3 |
0.4 |
0.5 |
0.7 |
0.9 |
1.0 |
1.4 |
2.3 |
4.1 |
RG-213 |
0.1 |
0.2 |
0.2 |
0.4 |
0.4 |
0.5 |
0.7 |
1.2 |
2.2 |
RG-214 |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.8 |
1.4 |
2.5 |
RG-393 |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.5 |
0.7 |
1.2 |
2.3 |
RG-400 |
0.3 |
0.4 |
0.6 |
0.8 |
1.0 |
1.2 |
1.6 |
2.7 |
4.7 |
LMR-240 |
0.2 |
0.2 |
0.3 |
0.5 |
0.6 |
0.7 |
0.9 |
1.5 |
2.6 |
LMR-240 Ultra |
0.2 |
0.3 |
0.4 |
0.5 |
0.7 |
0.8 |
1.1 |
1.8 |
3.1 |
LMR-400 |
0.1 |
0.1 |
0.2 |
0.2 |
0.3 |
0.3 |
0.4 |
0.8 |
1.3 |
LMR-400 Ultra |
0.1 |
0.1 |
0.2 |
0.3 |
0.3 |
0.4 |
0.5 |
0.9 |
1.6 |
100′ |
160 |
80 |
40 |
20 |
15 |
10 |
6 |
2 |
70 |
RG-8 |
0.3 |
0.4 |
0.5 |
0.7 |
0.9 |
1.0 |
1.4 |
2.4 |
4.4 |
RG-8U |
0.3 |
0.4 |
0.5 |
0.7 |
0.9 |
1.0 |
1.4 |
2.4 |
4.4 |
RG-8X |
0.5 |
0.7 |
0.9 |
1.3 |
1.6 |
1.9 |
2.6 |
4.5 |
8.1 |
RG-58 |
0.6 |
0.9 |
1.2 |
1.7 |
2.1 |
2.4 |
3.3 |
5.5 |
9.8 |
RG-59 |
0.4 |
0.6 |
0.9 |
1.2 |
1.5 |
1.8 |
2.4 |
4.1 |
7.2 |
RG-142 |
0.5 |
0.7 |
1.0 |
1.4 |
1.7 |
2.0 |
2.7 |
4.6 |
8.2 |
RG-213 |
0.3 |
0.4 |
0.5 |
0.7 |
0.9 |
1.0 |
1.4 |
2.4 |
4.4 |
RG-214 |
0.3 |
0.4 |
0.6 |
0.8 |
1.0 |
1.2 |
1.6 |
2.7 |
4.9 |
RG-393 |
0.3 |
0.4 |
0.5 |
0.7 |
0.9 |
1.1 |
1.4 |
2.5 |
4.5 |
RG-400 |
0.6 |
0.8 |
1.1 |
1.6 |
2.0 |
2.3 |
3.1 |
5.3 |
9.4 |
LMR-240 |
0.3 |
0.5 |
0.6 |
0.9 |
1.1 |
1.3 |
1.8 |
3.0 |
5.2 |
LMR-240 Ultra |
0.4 |
0.6 |
0.8 |
1.1 |
1.3 |
1.6 |
2.1 |
3.6 |
6.2 |
LMR-400 |
0.2 |
0.2 |
0.3 |
0.5 |
0.6 |
0.7 |
0.9 |
1.5 |
2.7 |
LMR-400 Utra |
0.2 |
0.3 |
0.4 |
0.6 |
0.7 |
0.8 |
1.1 |
1.8 |
3.2 |