Semi-Finished Coaxial Cable – RG7 CCS/48/CCA
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 (Tape) | Bonded Aluminum-Polyester Foil (100%) | — |
| Second Shield (Braid) | 48-wire Copper-Clad Aluminum (CCA), ~30–35% coverage | — |
| Outer Jacket | Not included (semi-finished format) | — |
Outer Diameter (semi-finished core): ~6.0 mm
Finished Cable OD (with jacket): ~7.8–8.2 mm (depending on jacket type)
2. Electrical Performance
| Parameter | Typical Value |
|---|---|
| Characteristic Impedance | 75 ohms |
| Capacitance | ~54 pF/m |
| Velocity of Propagation | ~85% (FPE) |
| Attenuation @ 100 MHz | ~7.2–7.5 dB/100m |
| Shielding Effectiveness | Basic |
| Mechanical Strength | High (due to CCS core) |
3. Key Features
CCS Inner Conductor: Delivers excellent pulling strength and durability during installation
48-Wire CCA Braid: Provides minimal shielding suitable for low-EMI environments
Bonded Aluminum Foil: Helps maintain signal integrity and reduces leakage
Semi-Finished Format: Allows flexibility in jacket design—ideal for indoor/outdoor, flame-retardant, or direct burial uses
4. Application Scenarios
Residential CATV signal distribution
Satellite and broadband installations with minimal EMI interference
OEM and private-label production with jacket customization
Cost-sensitive infrastructure builds and export
5. Considerations
Lower shielding and higher attenuation than 64- or 96-braid alternatives
Not ideal for environments with heavy electromagnetic interference
Must be jacketed before use in the field to meet safety and environmental requirements
6. Comparison Table – RG7 Semi-Finished Cores
| Variant | Conductor | Braid Shield | Shield Coverage | Attenuation @100 MHz | Shielding Level | Cost |
|---|---|---|---|---|---|---|
| CCS/48/CCA | CCS | CCA x 48 | ~30–35% | ~7.2–7.5 dB/100m | Basic | 💲 |
| CCS/64/CCA | CCS | CCA x 64 | ~40% | ~6.8–7.0 dB/100m | Moderate | 💲💲 |
| CCS/96/CCA | CCS | CCA x 96 | ~60–65% | ~6.6–6.8 dB/100m | Good | 💲💲💲 |
| CU/64/CCA | Copper | CCA x 64 | ~40–45% | ~6.4–6.6 dB/100m | Higher | 💲💲💲 |
