Semi-Finished Coaxial Cable – RG7 CCS/48/AL
1. Cable Structure (No Outer Jacket)
| Component | Material | Approximate Value |
|---|---|---|
| Inner Conductor | Copper-Clad Steel (CCS), Ø ~1.13 mm | ~18 AWG |
| Dielectric Insulation | Foamed Polyethylene (FPE) | ~5.0–5.3 mm |
| First Shield (Foil) | Bonded Aluminum-Polyester Tape (100%) | — |
| Second Shield (Braid) | 48 strands Aluminum (AL), ~30–35% coverage | — |
| Outer Jacket | Not included (semi-finished format) | — |
Outer Diameter (core only): ~5.5–5.8 mm
Final OD (after jacket): ~7.0–7.5 mm (depends on jacket type)
2. Electrical Performance
| Parameter | Typical Value |
|---|---|
| Characteristic Impedance | 75 ohms |
| Capacitance | ~54 pF/m |
| Velocity of Propagation | ~83–85% (FPE) |
| Attenuation @ 100 MHz | ~7.2–7.5 dB/100m |
| Shielding Effectiveness | Basic to Moderate |
| Mechanical Durability | High (due to CCS core) |
3. Key Features
CCS Inner Conductor: High strength for long pulls and durable installations
48-Wire Aluminum Braid: Suitable for low to moderate EMI environments
100% Foil Shielding: Improves signal retention despite lower braid density
Semi-Finished Format: Allows flexible jacket selection (PE for outdoor, PVC for indoor, LSZH for fire safety, etc.)
4. Application Scenarios
Mid-range CATV distribution and backbone cabling
Satellite TV signal transmission in residential or commercial networks
OEM production for export or regional compliance customization
Low-cost bundled coaxial assemblies
5. Limitations
Higher attenuation than RG6 and RG11 due to smaller conductor diameter
Lower shielding than 64- or 96-wire braided versions
Jacket must be applied before use to ensure compliance with environmental and safety requirements
6.Comparison Table – RG7 Semi-Finished Cores
| Variant | Conductor | Braid Type | Shield Coverage | Attenuation @100 MHz | Shielding Level | Cost |
|---|---|---|---|---|---|---|
| CCS/48/AL | CCS | AL x 48 | ~30–35% | ~7.2–7.5 dB/100m | Basic | 💲 |
| CCS/64/AL | CCS | AL x 64 | ~40% | ~6.9–7.2 dB/100m | Moderate | 💲💲 |
| CU/64/AL | Copper | AL x 64 | ~40% | ~6.4–6.7 dB/100m | Good | 💲💲💲 |
