Top-quality construction is a major feature of this 4-metre beam antenna. With the increase in activity on 4m, this 3 elements directional beam will give you the edge, and you will be amazed at the contacts that can be made on this very interesting and friendly band

Key Features/Specifications: Sirio SY68-3

70Mhz (4 metres) Beam Antenna

Type - Directional, High-gain

Vertical or Horizontal polarization

Made of aluminium alloy 6063 T-832

Electrical Data

Type: 3 element Yagi antenna

Frequency range @ SWR 1.5: 68-78 Mhz

Impedance: 50 Ohms

Radiation (H-plane): beamwidth @ -3 dB = 130° @ center freq.

Radiation (E-plane): beamwidth @ -3 dB = 70° @ center freq.

Front to back ratio: 15 dB

Polarization: Linear vertical or horizontal

Gain: 4.85 dBd - 7 dBi

Max. power: 350 Watts

Grounding protection: All metal parts are DC-grounded, the inner conductor is coupled capacitively

Connector: UHF-female with rubber protection cap

Mechanical Data

Materials: Aluminium, die-cast Zamak, EPDM rubber, zinc plated steel, chromed brass

Wind load:

SY 68-3: 203 N @ 150 Km/h

Wind resistance: 120 Km/h

Dimensions (L x W approx.):

SY 68-3: 1600x2235 mm

Boom/elements diameter: 33mm/16mm

Turning radius (approx.): SY 68-3: 1875 mm

Weight (approx.): 3360 gr

Operating temperature: -40° C to +80° C

Mounting mast: Ø 35-52 mm.