Sirio SB 3M Marine 156-163 Mhz VHF Marine Antenna

Sirio SB 3M Marine 156-163 Mhz VHF Marine Antenna

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.

Features:

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

Type: HF: 1/4 λ central loaded VHF: 1/4 λ

Frequency @ SWR ≤2: HF 26.45-27.55 MHz, VHF 139-151 MHz

Impedance: 50Ω

Radiation (H-plane): 360° omnidirectional

Polarization: linear vertical

Gain: 0 dB ref. to a λ /4 whip

Max Power (CW) @ 30°C: HF 120 Watts, VHF 200 Watts

Connector: UHF-male (PL 259)Type: 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