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Cable design Semiflex.250
Structurally, the Semiflex.250 cable consists of:
- central conductor: copper, silver wire with a diameter of 1,6 mm
- dielectric made of one-piece fluoroplastic (PTFE) with a diameter of 5,3 mm
- outer conductor made of tinned copper braid with a diameter of 6,35 mm
Electrical characteristics of Semiflex.250 cable
Wave resistance: 50±2 Ohm
Linear capacitance: 94 pF/m
Relative speed: 71%
Shortening factor: 1,4
Nominal permissible voltage: 2500 V DC
Test voltage: 9 kV, direct current
Insulation resistance: >1500 MΩ
Losses and allowable power for Semiflex cable.250
| 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
Curb weight: 110 kg/km
Packaging and labeling
The cable is wound on a plastic reel with a nominal length of 25 m.
Upon request, the Semiflex.250 cable can be cut to shorter lengths.
Compatibility and analogues
The Semiflex.250 coaxial cable is part of the G9 cable group and is similar in size to the following widely used types of HF coaxial cables: EZ 250, Flexiform 401, RG-401/U, SUCOFORM 250, UT-250.
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