3B-223 HF 3-Band antenna

  • 3B-223 HF 3-Band antenna

HF 3-Band Yagi antenna 3B-223

3B-223 Triband 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.

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One of the most important thing on antenna is mechanics. We take special care to make antenna that last longer. 
We use 5 mm metal sheet zinc plated and plastic coated (to protect zinc) with 12 mm stainless steel clamps.
Antenna element mounting:
3-band-antenna-3B-223-Element-Mounting www.antennas-amplifiers.com
3-band-antenna-3B-223-Element-Mounting UV stabilized plastics
3B-223 Antenna dipole mounting:
3-band-antenna-3B-223-dipole-Mounting-bracket www.antennas-amplifiers.com
Tri-band-antenna-3B-223-Dipole-Mounting www.antenna-amplifiers.com
Stainless steel screws with electrically large surface transitions.
3-Band antenna 3B-223 common feed line:
3-band-antenna-3B-223-common-feed-line www.antennas-amplifiers.com
Easy to connect coaxial cable with PL-259 connector.
Watertight UV stabilized box.
Common mode balun with Teflon cable.
Measured common mode choke isolation with HP8753ES Network Analyzer:
14.1 MHz = 1.8 kOhm
21.2 MHz > 5 kOhm
28.4 MHz = 1.8 kOhm
Max. power = 2.5 kW
Used RG142 teflon coaxial cable
Electrical Specifications      
  14 MHz 21 MHz 28 MHz
Frequency Range: 14.0 - 14.35 MHz 21.0 - 21.45 MHz 28.0 - 29.5 MHz
Free Space Forward Gain: 6.7 dBi 6.8 dBi 7.7 dBi
Forward Gain 20m AGL 12 dBi 12.9 dBi 13.6 dBi
Front to Back Ratio: 16 dB 18 dB 25 dB
3 dB Horizontal Beamwidth: 68° 68° 62°
Number of active elements per band: 2 2 3
Maximum SWR at any freq.: 1 : 1.3 1 : 1.4 1 : 1.2
Maximum Power Input: More than 1.5 kW More than 1.5 kW More than 1.5 kW
Matching Method: Direct feed through current balun. One cable for all three bands.
Connector: SO239    
Mechanical Specifications      
Boom length: 4.5 m    
Boom Diameter: 70 mm or 80x80mm    
Longest element: 11.6 m    
No. of elements: 7    
Turning radius: 6.0 m    
Surface Area: 1.1 m2    
Mounting Mast Diameter: 43 - 70 mm    
Survival Wind Speed:   170 km/h     
Weight: 45.5 kg    



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  • Product Code: 4150
  • Availability: In Stock
  • 590.00€

Tags: 3-band antenna, 3b-223, hf triband, tri-band hf antenna