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Home > Antennas > Amateur Radio Antenna > Base Station Antenna > VHF/UHF Antenna

Sirio CX-4-68 70MHz 4 metre 70MHz 3/4 Wave Ham Base Antenna
Sirio CX-4-68 70MHz 4 metre 70MHz 3/4 Wave Ham Base Antenna

This is the Sirio CX-4-68 Amateur Radio Base Antenna for use on the 70MHz 4 metre amateur radio band.

In our humble opinion, there are few antennas for 4m amateur radio base station use that are anywhere near comparable for both performance and price.

In a recent review this antenna was compared to the Watson WVB-70 half-wave, and as well as outperforming the Watson by 2 S points, the Sirio was commended for it's excellent build quality - unlike the Watson.

Type: 3/4λ coaxial J-pole 
• Frequency range CX 4-68 : 68-73 MHz tunable by diagram 
• Impedance: 50Ω 
• Radiation (H-plane): 360° omnidirectional 
• Radiation (E-plane): beamwidth at -3 dB = 60° 
• Radiation angle: 3° 
• Polarization: vertical 
• Gain: 2dBd - 4.15 dBi 
• Bandwidth @ SWR 1.5:
 CX 4-68: ≥ 1.7 MHz @ 68 MHz 
• SWR. @ res. freq.: ≤ 1.2 
• Max. power: 500 Watts 
• Feed system / position: gamma match / base 
• Connection: UHF-female 
   
Mechanical Data 
• Materials: Aluminium, Brass, Stainless Steel, Nylon 
• Wind load / resistance: 97 N at 150 Km/h / 150 Km/h 
• Wind surface: 0.08 m² 
• Height (approx.): from 2720 to 3325 mm 
• Weight (approx.): 1900 gr 
• Mounting mast: Ø 35-42 mm






Our Price: £69.95






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