Semi-Finished Coaxial Cable
Semi-Finished Coaxial Cable RG11
Low Loss 75 Ohm Trunk Core for Long Distance Distribution
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Semi-Finished Coaxial Cable RG7
Trunk Grade Foamed PE Core for CATV Backbone Cable
Product Overview
What This Product Is
RG7 sits between RG6 and RG11: a larger conductor and dielectric than a drop cable, but easier to handle than full trunk cable. Loss is around 4.2 dB/100m at 100 MHz over a 5 to 1000 MHz range, which is why it is specified for CATV backbone runs and commercial RF distribution. Supplied as a core, it goes straight onto your jacketing line with the shield configuration you ordered.
Semi-Finished Coaxial Cable
Key Benefits
What It Gives Your Production Line
Backbone Performance in a Workable Size
Low attenuation over long runs without the handling penalty of the largest trunk constructions.
Full CATV Band Covered
A 5 MHz to 1000 MHz range takes in return path, forward path and satellite IF distribution.
Shield Built to Order
Standard foil plus braid, tri-shield or quad-shield, with braid coverage from 40 to 95 percent.
Coils Sized for Project Work
Typically 500 m or 1000 m per coil, wound on wooden or plastic reels and film-wrapped.
Application Scenarios
Where It Is Used
- CATV backbone and main distribution lines
- Satellite TV systems
- Commercial-grade RF transmission
- Long-distance signal distribution
Who It Is For
Who Buys It
- Cable plants supplying CATV network builders
- Manufacturers who jacket to project-specific fire ratings
- Exporters who need a mid-size trunk core in stock
Problems It Solves
The Reasons Buyers Move To This Product
Signal Budget Runs Out Mid-Span
Drop-grade cable loses too much over a long backbone. RG7 buys headroom without moving to the heaviest construction.
Foamed Core Capacity Is the Bottleneck
Foaming lines are the constraint in most plants. Buying the core moves the constraint off your floor.
Every Project Wants a Different Jacket
Unjacketed cores let one purchase serve indoor, outdoor and fire-rated finishes.
Technical Features
Construction And Materials
- Dielectric: foamed PE
- Conductor: BC, CCA, CCS or CCAM
- Shield: foil + braid, tri-shield or quad-shield
- Foil: aluminium or copper
- Braid: BC, CCA, AL or TC, 40 to 95 percent coverage
- Supplied without outer jacket
Certifications And Compliance
No product certification is claimed for this item beyond the standards named in the specification table. Where a specific certificate is required for your market, ask before ordering and we will confirm what can be provided.
Specifications
Published Figures
| Characteristic Impedance | 75 ± 3 Ω |
|---|---|
| Capacitance | Approx. 50 pF/m |
| Nominal Velocity of Propagation | 85% |
| Attenuation | About 4.2 dB/100m @ 100 MHz |
| DC Resistance | Approx. 5.5 Ω/100m (conductor) |
| Frequency Range | 5 MHz – 1000 MHz |
| Voltage Rating | 300 V |
| Core Length | 500 m or 1000 m coils |
| Reel Type | Wooden or plastic reels |
| Weight per Reel | Approx. 18–22 kg per 500 m |
| Outer Jacket | Not included |
Figures are the published specification for this product. Values outside this table are confirmed in writing before order rather than estimated.
Manufacturing And Quality Control
How It Is Produced And Checked
Production runs from conductor preparation — rod drawing, annealing, stranding and surface cleaning — through foamed insulation extrusion with controlled cell size and on-line diameter monitoring, then foil wrapping and braiding to the shield specification ordered. The line stops before jacket extrusion.
Conductor Preparation
Rod drawing, annealing and surface cleaning so the insulation bonds without microvoids.
Insulation Monitoring
Insulation thickness and concentricity monitored continuously on line during extrusion.
Shield Verification
Foil overlap and braid coverage checked against the ordered shield construction.
Electrical Spot Check
Impedance and attenuation sampled against the published values for the construction.
Reel Packing
Reels wrapped in plastic film against moisture and dust, then cartoned or palletised.
Customisation Options
What Can Be Changed
- Conductor grade BC, CCA, CCS or CCAM
- Shield depth: standard, tri or quad
- Braid material and coverage
- Coil length
- Shrink-wrap or carton outer packing
Use Guide
Working With It On Your Line
- Set the pay-off brake for a heavy coil so the core is not stretched at start-up.
- Preheat the core if your jacket compound needs it — adhesion on foamed PE depends on a clean, dry surface.
- Watch coil transition points; the outer layers of a 1000 m coil unwind faster than the core layers.
- Log attenuation spot checks per reel for project documentation.
Comparison
How It Compares Within The Range
Semi-Finished Coaxial Cable RG7 sits inside the Semi-Finished Coaxial Cable range. The products below are the closest alternatives or the parts most often ordered alongside it — compare the published specification tables rather than the descriptions when the choice is close.
Read Next
Applications Solutions And Guides
FAQ
Semi-Finished Coaxial Cable RG7 FAQ
Where does RG7 sit between RG6 and RG11?
Attenuation is about 4.2 dB/100m at 100 MHz, lower than RG6 and close to RG11, with a conductor and dielectric sized between the two.
What frequency band is it specified over?
5 MHz to 1000 MHz, covering the CATV return and forward paths and satellite IF distribution.
How is the core supplied?
On wooden or plastic reels in 500 m or 1000 m coils, wrapped in protective film against moisture and dust.
Can I order copper foil instead of aluminium?
Yes. Both aluminium and copper foil are available, on standard, tri-shield and quad-shield builds.
What does a 500 m reel weigh?
Approximately 18 to 22 kg, varying with conductor and insulation specification.
Request A Quotation For Semi-Finished Coaxial Cable RG7
Send the construction, grade and quantity you need. We confirm the specification in writing before quoting.