RG-142 cable design
constructively cable RG-142 consists of:
- central conductor: monofilament from silver-plated copper-plated steel with a diameter of 0,94 mm
- dielectric made of fluoroplastic (PTFE) with a diameter of 2,95 mm
- first shielding layer: braiding of silver-plated copper with a diameter of 3,5 mm
- second shielding layer: silver-plated copper braid with a diameter of 4,20 mm
- outer protective shell made of FEP, brown, transparent, 5 mm in diameter
Electrical characteristics of the RG-142 cable
Wave resistance: 50 ohms
Linear capacitance: 105 pF/m
Relative speed: 70%
Shortening factor: 1,42
Nominal permissible alternating voltage: 1900 V DC
Losses and allowable power for RG-142 cable
Frequency, MHz | Losses, dB/100 m* | Power, W** |
50 | 8,3 | 1456 |
100 | 12,5 | 1000 |
200 | 18,8 | 687 |
400 | 28 | 472 |
600 | 36 | 379 |
800 | 43 | 324 |
900 | 46 | 304 |
1000 | 49 | 287 |
1200 | 54 | 260 |
1500 | 62 | 230 |
1800 | 69 | 209 |
2000 | 73 | 197 |
2300 | 80 | 183 |
2500 | 84 | 175 |
3000 | 93 | 158 |
4000 | 110 | 135 |
5000 | 126 | 120 |
6000 | 140 | 109 |
* Typical values for 20ºС and altitude above sea level
** The value of the permissible average power for an ambient temperature of 40ºC
Mechanical characteristics of the RG-142 cable
Linear weight: 75 g/m
Minimum bending radius: 30 mm
Re-bending radius: 120 mm
Operating temperature: -40 ... +180 ºC
Compatibility and analogues
The RG-142 coaxial cable is included in the G5 cable group and is similar in size to the following widely used types of HF coaxial cables: RG-223/U, RG-400.
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