Sirio SB 3 U M-1 antenna operates within the frequency range of 155.8 to 160.1 MHz, specifically designed for marine applications.
Sirio SB 3 U M-1 antenna operates within the frequency range of 155.8 to 160.1 MHz, specifically designed for marine applications.
Sirio SB 3 U – VHF Marine Antenna Product Page - Radioworld UK
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Sirio SB 3 U M-1 antenna operates within the frequency range of 155.8 to 160.1 MHz, specifically designed for marine applications.
Sirio SB 3 U – VHF Marine Antenna Product Page - Radioworld UK

Sirio Antennas – CB, Amateur & Professional Radio Solutions

Sirio SB 3 U M-1 Marine Antenna – 155.8 to 160.1 MHz, 3/4 Wave

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£39.95
(£33.29 exc. VAT) + £5.00
Please note that there is an extra charge for deliveries exceeding 1.0 meter.
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Product code: SPA-SB3S-18
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£39.95
12 Months 14.9% APR
£3.99
£3.44
£45.31
£39.95
18 Months 14.9% APR
£3.99
£2.30
£45.31
£39.95
24 Months 14.9% APR
£3.99
£1.72
£45.31
£39.95
36 Months 14.9% APR
£3.99
£1.15
£45.31
£39.95
48 Months 14.9% APR
£3.99
£0.86
£45.31
£39.95
12 Months 19.5% APR
£3.99
£3.58
£46.96
£39.95
18 Months 19.5% APR
£3.99
£2.39
£46.96
£39.95
24 Months 19.5% APR
£3.99
£1.79
£46.96
£39.95
36 Months 19.5% APR
£3.99
£1.19
£46.96
£39.95
48 Months 19.5% APR
£3.99
£0.90
£46.96

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Sirio SB 3 U M-1 antenna operates within the frequency range of 155.8 to 160.1 MHz, specifically designed for marine applications.

Sirio SB 3 U M-1 Marine Antenna – 155.8 to 160.1 MHz, 3/4 Wave


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The Sirio SB 3 U M-1 is a high-performance marine antenna designed for fixed installations operating within the 155.8 to 160.1 MHz VHF band. Its 3/4 λ J-pole configuration ensures omnidirectional coverage and eliminates the need for a ground plane, making it perfect for mast-top mounting on vessels.

Built to withstand harsh marine environments, the antenna features a DC-ground static discharge protection system, a fibreglass-encased whip made from brass and copper, and a stainless steel bracket for secure installation. With a gain of 2 dBd (4.15 dBi) and a bandwidth of 5.5 MHz centered at 158 MHz, it delivers reliable signal performance for marine communications.

Key Features:

  • Frequency Range: 155.8–160.1 MHz

  • Type: 3/4 λ J-pole

  • Radiation: Omnidirectional

  • Polarization: Linear vertical

  • Gain: 2 dBd / 4.15 dBi

  • Bandwidth: 5.5 MHz @ SWR ≤ 2

  • Max Power: 100W CW

  • Connector: UHF-female (SO-239)

  • Materials: Brass, Copper, Fibreglass, Nylon

  • Height: Approx. 1465 mm

  • Weight: Approx. 300 g

  • Mounting: Stainless steel bracket (M-1)

  • Grounding: DC-ground static protection

  • Application: VHF marine band.

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