Description

1. Core Specifications Impedance: 50Ω (±0.5Ω) Outer Diameter: 0.875“ (22.2mm) Frequency Range: DC–3 GHz (TE11 mode) Power Handling: 25 kW peak @ 30 MHz 6 kW average @ 1 GHz Attenuation: 0.7 dB/100ft @ 100 MHz 2.2 dB/100ft @ 1 GHz 2. Construction Details Layer Material Key Feature Center Conductor Copper-clad aluminum (CCA) 0.375” OD, low thermal expansion Dielectric Foamed polyethylene 0.84 εᵣ, low loss Outer Conductor Corrugated aluminum Helical corrugation, 0.040“ wall Jacket UV-resistant PVC Black/orange, -40°C to +85°C range 3. Connector Options 7/16 DIN (Aluminum) – Best for high power (>10 kW) N-Type (Aluminum body) – For test interfaces EIA Flange Mount – Broadcast tower applications Recommended Models: Amphenol AL7/16-84 (7/16 DIN, 30kW rated) RFS ALN7 (N-Type, aluminum body) 4. Performance Comparison (vs. Copper) Parameter Aluminum 7/8” Copper 7/8“ Weight 0.5 lb/ft 0.9 lb/ft Corrosion Resistance High (anodized) Moderate (plated) Cost 30% lower Baseline Power Handling 85% of copper 100% 5. Installation Guidelines ✔ Bend Radius: Minimum 18” (45cm) ✔ Support Spacing: Every 5 ft (1.5m) horizontally ✔ Torque Specs: 7/16 DIN: 40 Nm N-Type: 20 in-lbs ✔ Grounding: Requires 4 AWG bonding wire 6. Key Advantages ✅ Lightweight – Ideal for long tower runs ✅ Corrosion-resistant – Anodized aluminum for harsh environments ✅ Cost-effective – Lower material cost than copper 7. Common Applications AM/FM Broadcast (50 kW+ systems) Military Comms (HF/VHF bands) Cell Tower Feeds (Low-PIM versions available) 8. Maintenance Tips Annual: Check for jacket cracks (especially at bends) Biannual: Verify torque on flange connections Every 5 Years: TDR test for impedance stability