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Semiflex.250 cable construction
Structurally, the Semiflex.250 cable consists of:
- center conductor: copper, silver-plated conductor with a diameter of 1,6 mm
- solid fluoroplast (PTFE) dielectric with a diameter of 5,3 mm
- 6,35 mm tinned copper outer conductor
Electrical characteristics of the Semiflex.250 cable
Wave impedance: 50±2 ohm
Linear capacitance: 94 pF/m
Relative speed: 71%
Shortening factor: 1,4
Rated allowable voltage: 2500 V RMS
Test voltage: 9 kV DC
Insulation resistance: >1500 MΩ
Losses and allowable power for Semiflex.250 cable
| Frequency, MHz | Losses, dB/100 m | Power, W |
| 400 | 15 | 1769 |
| 1000 | 25 | 1056 |
| 2000 | 38 | 728 |
| 3000 | 49 | 581 |
| 4000 | 58 | 503 |
| 5000 | 66 | 450 |
| 6000 | 74 | 411 |
| 10000 | 101 | 294 |
| 18000 | 147 | 190 |
Mechanical characteristics of Semiflex.250 cable
Operating temperature range: -65 … +180ºС
Linear weight: 110 kg/km
Packaging and labeling
The cable is wound on a plastic reel with a nominal length of 25 m.
On request, the Semiflex.250 cable can be cut to shorter lengths.
Compatibility and analogues
The Semiflex.250 coaxial cable is included in the G9 cable group and is similar in size to the following widely used types of RF coaxial cables: EZ 250, Flexiform 401, RG-401/U, SUCOFORM 250, UT-250.
N type connector
TNC type connector
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