ham:cables
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) |
ham/cables.txt · Last modified: 2013/10/21 21:52 by 127.0.0.1