I0JXX Superflexy 7 Coaxial Cable – Ultra-Low Loss 50Ω Coaxial Cable for HF, VHF & UHF | Radioworld UK
I0JXX Superflexy 7 Coaxial Cable – Ultra-Low Loss 50Ω Coaxial Cable for HF, VHF & UHF | Radioworld UK
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I0JXX Antennas – Coaxial Cables & Accessories.
I0JXX Superflexy 7 Coaxial Cable – Ultra-Low Loss 50Ω Coaxial Cable for HF, VHF & UHF | Radioworld UK
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I0JXX Superflexy 7 Coaxial Cable – Ultra-Low Loss 50Ω Coaxial Cable for HF, VHF & UHF | Radioworld UK
The I0JXX Superflexy 7 is a premium low-loss 50Ω coaxial cable designed for HF, VHF, UHF, and microwave applications where high performance, flexibility, and reliability are essential.
Manufactured in Italy by I0JXX Antennas, the Superflexy 7 features a stranded copper conductor (19 × 0.38 mm), triple shielding, and a UV-resistant PVC jacket, ensuring durability in both fixed and portable installations.
With its 7.3 mm outer diameter, excellent screening efficiency (>105 dB, Class A++), and low attenuation, the Superflexy 7 is ideal for base station feedlines, rotator loops, amplifier connections, and SDR systems requiring top-tier coaxial performance.
The skin/foam/skin polyethene dielectric ensures a velocity ratio of 83% and superb phase stability, while maintaining low capacitance (75 pF/m). With maximum power handling of up to 8,000 W (1.8 MHz) and operating temperatures from –40°C to +60°C, this cable delivers reliable long-term operation in all conditions.
The Superflexy 7 offers attenuation comparable to larger, heavier coax cables, but in a lighter, more manageable design — a perfect balance of performance and flexibility.
Key Features
High-quality 50Ω coaxial cable for HF, VHF, UHF & microwave use
Outer diameter: 7.3 ± 0.2 mm – compact and flexible
Stranded copper conductor (19 × 0.38 mm) for maximum flexibility
Triple shielding: CU/PET foil (100%) + 83% copper braid
Screening efficiency: >105 dB (Class A++)
Ultra-low loss and high power handling: up to 8 kW at 1.8 MHz
Velocity factor: 83% – stable across all frequencies
Capacitance: 75 ± 2 pF/m
Minimum bend radius: 40 mm (single) / 70 mm (multiple)
Operating temperature range: –40°C to +60°C
UV-resistant black PVC jacket for outdoor and indoor applications
Manufactured in Italy by I0JXX Antennas
Technical Specifications
| Specification | Details |
|---|---|
| Model | Superflexy 7 |
| Impedance | 50 ± 3 Ω |
| Outer Diameter | 7.3 ± 0.2 mm |
| Inner Conductor | Stranded copper (19 × 0.38 mm) |
| Dielectric | Skin/Foam/Skin PE, Ø 5.0 ± 0.15 mm |
| Shielding | CU/PET foil (100%) + Copper braid (83%) |
| Outer Sheath | Black PVC (UV-resistant) |
| Capacitance | 75 ± 2 pF/m |
| Velocity Ratio | 83% |
| DC Resistance (Inner/Outer) | 7.3 / 9.8 Ω/km |
| Screening Efficiency | >105 dB (Class A++) |
| SRL (Structural Return Loss) | >28 dB (0.3–600 MHz), >22 dB (600–1200 MHz), >18 dB (1200–2000 MHz) |
| Minimum Bend Radius (Single/Multiple) | 40 / 70 mm |
| Operating Temperature Range | –40°C to +60°C |
| Voltage Withstand | 4.0 kV |
| Copper Content | 40.2 kg/km |
| Cable Weight | 69.9 kg/km |
| Max Peak Power | 8,000 W |
| Manufacturer | I0JXX Antennas, Italy |
Attenuation (20°C) & Power Handling (40°C)
| Frequency (MHz) | Attenuation (dB/100m) | Max Power (W) |
|---|---|---|
| 1.8 | 0.95 | 4572 |
| 3.5 | 1.28 | 3393 |
| 7 | 1.60 | 2714 |
| 10 | 1.90 | 2286 |
| 14 | 2.20 | 1974 |
| 21 | 2.60 | 1670 |
| 28 | 3.00 | 1448 |
| 50 | 4.00 | 1086 |
| 100 | 5.80 | 749 |
| 144 | 6.90 | 629 |
| 200 | 8.20 | 530 |
| 400 | 11.80 | 368 |
| 1000 | 19.30 | 225 |
| 3000 | 36.20 | 120 |
| 6000 | 55.30 | 79 |
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