Semi-Finished Coaxial Cable – RG7 CCS/64/AL
1. Cable Structure (No Outer Jacket)
| Component | Material | Approximate Diameter |
|---|---|---|
| Inner Conductor | Copper-Clad Steel (CCS), Ø ~1.13 mm | 18 AWG |
| Dielectric Insulation | Foamed Polyethylene (FPE) | ~5.2–5.4 mm |
| First Shield (Foil) | Bonded Aluminum-Polyester Tape (100%) | — |
| Second Shield (Braid) | 64 strands Aluminum (AL), ~40% coverage | — |
| Outer Jacket | Not included (semi-finished format) | — |
Outer Diameter (semi-finished core): ~5.8–6.0 mm
Final Jacketed Cable OD: ~7.5–8.0 mm (depending on jacket type)
2. Electrical Performance
| Parameter | Typical Value |
|---|---|
| Characteristic Impedance | 75 ohms |
| Capacitance | ~54 pF/m |
| Velocity of Propagation | ~85% (due to FPE) |
| Attenuation @ 100 MHz | ~6.9–7.2 dB/100m |
| Shielding Effectiveness | Moderate |
| Mechanical Strength | High (due to CCS core) |
3. Key Features
CCS Conductor: Provides high mechanical durability for long-pull or buried installations
64-Wire Aluminum Braid: Offers better EMI protection than 48-wire versions
Bonded Foil Tape: Ensures complete 100% shield coverage
Jacket-Free Core: Ready for custom jacketing: indoor (PVC), outdoor (PE), fire-resistant (LSZH), UV-protected, etc.
4. Application Scenarios
CATV and broadband mainline or trunk cables
Satellite signal transmission in residential or commercial installations
Export-ready coaxial cable core for local jacket processing
Moderate EMI environments where performance and affordability must be balanced
5. Limitations
Higher attenuation than RG11 due to smaller conductor
Not suitable for high-frequency, low-loss, or high-shielded critical infrastructure
Needs jacket before being field-installed
6. Comparison Table – RG7 Semi-Finished Cores
| Variant | Conductor | Braid Shield | Shield Coverage | Attenuation @100 MHz | EMI Protection | Cost |
|---|---|---|---|---|---|---|
| CCS/64/AL | CCS | AL x 64 | ~40% | ~6.9–7.2 dB/100m | Moderate | 💲💲 |
| CCS/48/AL | CCS | AL x 48 | ~30–35% | ~7.2–7.5 dB/100m | Basic | 💲 |
| CU/64/AL | Copper | AL x 64 | ~40% | ~6.5–6.7 dB/100m | Better | 💲💲💲 |
