OMA-3B12 12 Element 3 Band Antenna

  • Product Code: OMA-3B12
  • Stock: Pre-Order
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3 Band  antenna for 20, 15 and 10m band uses a common feed line. Input power limited by feed line only. Low SWR, excelent F/B, excelent F/S ratio. Wind survival speed 170 km/h.

A very flexible alloy EN AW 2024 (not EN AW 6060) is used for the elements. All fasteners ( screws , screw nuts, etc are from stainless steel. 

Easy to connect coaxial cable with PL-259 connector.

Electrical Specifications:

Band:14 MHz21 MHz28 MHz
Frequency Range:14.0 - 14.35 MHz21.0 - 21.45 MHz28.0 - 29.5 MHz
Free Space Forward Gain:7,1 dBi7,22 dBi9,6 dBi
Forward Gain 20m AGL:11,9 dBi12,4 dBi14,6 dBi
Front to Back Ratio:24 dB24 dB21 dB
3 dB Horizontal Beamwidth:676553
Number of active elements per band:345
Maximum SWR at any freq.:1 : 1,21 : 1,11 : 1.5
Maximum Power Input:3 kW (balun included)
Matching Method:Direct feed through current balun. One cable for all three bands.
Connector:SO239 ( N connector optional )

Mechanical Specifications:

Boom length:7.2 m
Boom Diameter:60 x 60mm
Longest element:11.42 m
No. of elements:12
Turning radius:6,73 m
Surface Area:2,26
Mounting Mast Diameter:43 - 70 mm
Survival Wind Speed:130 km/h
Wind load at 130km/h:717 N / 1,20 m² /9,68 feet²
Weight:33,5 kg