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Attenuation & Power Calculator
| 2 1/4" LDF | 1 5/8" LDF | 1 1/4" LDF | LMR- 1700 | 7/8" LDF | LMR- 1200 | LMR- 900 |
| Frequency/Size | 2.350" | 1.980" | 1.550" | 1.670" | 1.090" | 1.200" | 0.870" |
| 30 MHz | 39.5* | 28.9 | 21.1 | 20.3 | 14.0 | 12.6 | 8.9 |
| 50 MHz | 30.2* | 22.1 | 16.2 | 15.6 | 10.7 | 9.7 | 6.9 |
| 150 MHz | 16.7* | 12.3 | 9.09 | 8.7 | 6.04 | 5.5 | 3.9 |
| 220 MHz | 13.5* | 13.5* | 7.45* | 7.1 | 4.94 | 4.5 | 3.2 |
| 450 MHz | 8.91 | 6.71 | 5.01 | 4.8 | 3.32 | 3.1 | 2.2 |
| 900 MHz | 5.90* | 4.49* | 3.39* | 3.3 | 2.24 | 2.1 | 1.5 |
| 1,500 MHz | 4.29* | 3.30 | 2.52 | 2.4 | 1.66 | 1.6 | 1.0 |
| 2,000 MHz | 3.57* | 2.76 | 2.13 | 2.0 | 1.4 | 1.3 | 0.9 |
| 2,500 MHz | -.- | 2.40 | 1.84* | 1.8 | 1.21* | 1.2 | 0.8 |