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RG-400 cable design
Structurally, it is a coaxial cable RG-400 consists of:
- central conductor: stranded 19×0,2 mm of silver copper, total diameter 0,98 mm
- dielectric made of one-piece fluoroplastic (PTFE) with a diameter of 2,95 mm
- first shielding layer: braiding of silver-plated copper with a diameter of 3,50 mm
- second shielding layer: silver-plated copper braid with a diameter of 4,10 mm
- outer protective sheath made of fluoroplastic (FEP) of brown transparent color with a diameter of 4,80 mm
Electrical characteristics of the RG-400 cable
Wave resistance: 50 ohms
Linear capacitance: 94 pF/m
Relative speed: 70%
Shortening factor: 1,42
Nominal permissible alternating voltage: 1400 V DC
Nominal direct current: 27 A
Breakdown voltage: 5 kV
Losses and allowable power for RG-400 cable
| Frequency, MHz | Losses, dB/100 m* | Power, W** |
| 30 | 8 | 2008 |
| 100 | 15 | 1100 |
| 400 | 31 | 550 |
| 1000 | 50 | 348 |
| 2500 | 82 | 220 |
* 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-400 cable
Linear weight: 70 g/m
Compatibility and analogues
The RG-400 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,
Konstantin -
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