COAX & BASE STATION FUN FACTS
NULL LINE DIMENTIONS
(26.965 – 27.405 MHz)
66% VF 78% VF (feet) (feet)
23.88 28.33
47.46 56.44 71.64 84.66 95.52 112.88 119.40 141. 11
-1dB = 21% signal loss
-2 dB = 37.5 loss
-3 dB = 50% loss
100’ RG58 @30 MHz = -2.1 dB
RG8X = -1.94 dB
RG8 = -1.14 dB
LMR 400 = -0.7 dB
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dBi (theoretical) take off 2.15 for dBd (actual)
A99 +8.1 what a joke
Sirio 2016 +1.3
V5000 +5 also a joke
SWR LOSSES
| SWR | %LOSS | dB |
| 1.1:1 | 0 | -0.0098 |
| 1.2:1 | -0.8 | -0.036 |
| 1.3:1 | -1.7 | -0.074 |
| 1.4:1 | -2.8 | -0.122 |
| 1.5:1 | -4 | -0.177 |
| 1.6:1 | -5.3 | -0.237 |
| 1.7:1 | -6.7 | -0.302 |
| 1.8:1 | -8.2 | -0.369 |
| 1.9:1 | -9.6 | -0.439 |
| 2.0:1 | -11.1 | -0.511 |
| 2.5 | -18.4 | -0.88 |
| 3 | -25 | -1.25 |