Top quality construction is a major feature of this 4 metre beam antenna. With the increase in activity on 4m, this 3 element 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.

Top quality construction is a major feature of this 4 metre beam antenna. With the increase in activity on 4m, this 3 element 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 metre) 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