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Sirio SB 3M Marine VHF Marine Antenna (156-163mhz)

Sirio SB 3M Marine VHF Marine Antenna (156-163mhz)
3/4 λ marine antenna working on 156-163 MHz without Ground Plane. It is particularly protected against the worst sea weather thanks to its conic glass fibre tube which makes it strong and solid in every situation. The radial whip is earthed in order to avoid stray R.F. currents and their discharges. All its metallic components are of chromium plated brass and stainless steel to get the robustness and full assurance; it is available in three different bases. It is provided with 5 m white cable RG 58 already connected. In the mentioned range of frequencies adjustments are not required.


  • Marine antenna, Mono-band
  • Omnidirectional
  • SB 3 M Low-gain
  • Designed to work without Ground Plane
  • Protection from static discharges DC-Ground
  • Chrome-plated brass ferrule High quality whip made of brass and copper protected by fiberglass tube
  • Supplied with white coaxial cable RG-58 C/U directly connected
  • Wide range of optional mounting bases

    Electrical Data

  • SB 3 M: 3/4 λ J-pole
  • Frequency range: TX band: SB 3M: 155.5 - 160 MHz @ SWR ≤2 RX band: 156-162 MHz
  • Impedance: 50Ω
  • Radiation (H-plane): 360° omnidirectional
  • Radiation (E-plane): SB 3 M: beamwidth @ -3 dB = 39°
  • Radiation angle deg.: SB 3 M: 21°
  • Polarization: linear vertical
  • Gain: SB 3 M: 2 dBd - 4.15 dBi
  • Max. Power (CW) @ 30°C: 100 Watts
  • Grounding Protection: All metal parts are DC-grounded, the inner conductor shows a DC short
  • Standard mount: SB 3 M: "M-8" NY
  • Cable length / Type: SB 3 M: 5 m / white RG 58

    Mechanical Data

  • Materials: Fiberglass, Nylon, Chromed brass
  • Height (approx.): SB 3 M: 1480 mm
  • Weight (approx.): SB 3 M: 750 gr
  • Quantity: Reviews
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