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DUAL | 3B-345 High Performance 3-band 12 el. STACK Antenna

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DUAL | 3B-345 High Performance 3-band 12 el. STACK Antenna

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Availability: In stock

Excl. Tax: €1,233.61 Incl. Tax: €1,505.00


High performance 3-Band STACK super Yagi antenna 3B-345 Tri-Band antenna 12 elements with central wide spaced elements that can fit in antenna towers up to 1m wide. Spec.

High performance 3-Band STACK super Yagi antenna 3B-345

Tri-Band antenna 12 elements with central wide spaced elements that can fit in antenna towers up to 1m wide. Specially designed for rotary towers and for antenna stacks.

 HF 3-Band super Yagi antenna 3B-345 can fit in the middle of rotary towers or on the top. We propose tower not wider than 0.8 m. It will perfectly fit with about 13 cm space from all elements to tower. Ideal for Triband stack.


Antenna uses common feed line. Input power limited by feed line only. Very low SWR, excelent F/B. Wind survival speed 170 km/h.

Featured Product: 3B-345

Parameter 14MHz 21 MHz 28 MHz
Frequency Range 14.0 - 14.35 MHz 21.0 - 21.45 MHz 28.0 - 29.0 MHz
Free Space Forward Gain 7.3 dBi 9.1 dBi 10.1 dBi
Front to Back Ratio 25 dB 20 dB 22 dB
3 dB Horizontal Beamwidth 64° 60° 52°
Number of active el. per band: 3 4 5
Nominal Input Impedance 50 Ohm 50 Ohm 50 Ohm
Maximum SWR at any frequency
1.3 - 1.15 - 1.35 1.1 - 1.05 - 1.15 1.1 - 1.0 - 1.5
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    
       
  STACK CHARACTERISTICS
  14 MHz 21 MHz 28 MHz
Frequency Range: 14.0 - 14.35 MHz 21.0 - 21.45 MHz 28.0 - 29 MHz
Free Space Forward Gain: 10.32 dBi 12.14 dBi 13.26 dBi
Front to Back Ratio: 19 dB 18 dB 19 dB
3 dB Vertical Beamwidth: 52° 36° 27°
Spacing between antennas: 10-12m Above results are for 11 m Stacking distance
       

Mechanical Specifications

Boom length: 8 m    
Boom Diameter: 80 x 80 mm    
Longest element: 11.6 m    
No. of elements: 12    
Turning radius: 7,1 m    
Surface Area: 1.45 m2    
Mounting Mast Diameter: 43 - 70 mm    
Survival Wind Speed: 170 km/h    
Weight: 75 kg    

3B-334 Specifications

14 MHz starting diameter of elements 35 mm.
21 MHz starting diameter of elements 25 mm.
28 MHz starting diameter of elements 25 mm.
Strong and sturdy initial diameters ensure high resistance to high wind and snow. 
Rugged construction will enable long-life operation in all weather condition.

Ttwo versions of antenna:

1. Tri-band antenna 3B-345 to be used alone. 3-Band antenna have best SWR across all bands 

2. Tri-band antenna 3B-345-Stack to be used in stack. Small difference is in element lengths that will improve SWR on all bands. 3-band antenna in stack will have best possible SWR as UPPER, LOWER and in STACK.

Family Overview

Model Elements Boom Gmax 14 MHz Gmax 21 MHz Gmax 28 MHz PRICE
3B-223 7 5,0 m 6,7 dBi 6,7 dBi 7,7 dBi 919,00 €
3B-334 10 6,4 m 7,2 dBi 7,9 dBi 9,4 dBi 1.447,00 €
3B-345 STACK 12 8,0 m 7,3 dBi 9,1 dBi 10,1 dBi 1.505,00 €
3B-456 15 11,6 m 9,4 dBi 10,8 dBi 11,2 dBi 2.018,00 €
3B-WARC Dipole 10 MHz / 18 MHz / 24 MHz   484,00 €
     

Other models and bands available. Please ask for details!
Outside EU minus 22% tax!
All prices include 22% VAT. Prices exclude shipping costs. 
 

 

Additional Information

Brand DUAL
Free Shiping No

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