Sirio Twin-Log 4 CB Mobile Antenna 26.65-27.75MHz, 1500W Peak, 125cm, 3/8"

The Sirio Twin Log 4 is a high-power CB mobile antenna using Sirio's parallel-connected twin-wire logarithmic loading system to reduce RF resistance and heat loss. It is tunable across 26.65-27.75MHz and uses a heavy-duty fibreglass radiator with a standard 3/8"-24 male thread.

With an approximate height of 1250mm, the Twin-Log 4 provides wider bandwidth and higher power handling than the Twin-Log 3 while retaining a practical mobile format.

Features

• High-power CB mobile antenna
• Parallel twin-wire logarithmic loaded design
• Tunable from 26.65-27.75MHz
• 500W CW continuous power handling
• 1500W CW short-time power handling
• At least 1.1MHz bandwidth at SWR ≤2
• Heavy-duty fibreglass rod
• Stainless-steel tuning top
• 3/8"-24 male mounting thread
• Omnidirectional vertical radiation pattern

Technical Specifications

• Manufacturer: Sirio Antenne
• Model: Twin-Log 4
• Manufacturer Part Number: 2408215.03
• Type: Twin-wire logarithmic loaded CB mobile antenna
• Frequency Range: 26.65-27.75MHz, tunable
• Impedance: 50 ohms
• Radiation: Omnidirectional
• Polarisation: Linear vertical
• SWR at Resonance: ≤1.3
• Bandwidth: ≥1.1MHz at SWR ≤2
• Maximum Power: 500W CW continuous / 1500W CW short time
• Height: Approx. 1250mm
• Weight: Approx. 350g
• Mounting: 3/8"-24 male thread
• Materials: Copper, chromed brass, stainless steel and fibreglass

Package Contents

• Sirio Twin-Log 4 antenna
• Installation manual

Installation

The Twin-Log 4 is designed for installation on a compatible 3/8"-24 female stud or mount. Tune the antenna after installation for the required operating frequency.