Search

3B-345 HF Triband STACK antenna

3B-345 HF Triband STACK antenna
Product Code: 0112
Price: 990.00€
   - OR -   

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-Tri-band-antenna-3B-345HD

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.
 
Electrical Specifications      
     
Frequency Range: 14.0 - 14.35 MHz 21.0 - 21.45 MHz 28.0 - 29 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 elements per band: 3 4 5
VSWR 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    
       
Mechanical Specifications      
Boom length: 8 m    
Boom: 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    

Two antenna stack:

Electrical Specifications 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
 
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.
 
We produce two 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.
Copyright   2014 - All Right Reserved DUAL Serbia