OB4-40 4 Element 40m duo driven Monoband-Yagi

OB4-40 4 Element 40m duo driven Monoband-Yagi

The best 4 element 40m duodriven monoband-Yagi of the world:

 

 

  • The OptiBeam high Q air coil reduces the length of the elements nearly lossfree down to clearly below convenient 15 meters.
  • complete coverage of the 300 kHz with best SWR, constant gain and stable radiation pattern.
  • Due to the especially developed „40m decoupling stubs“ interaction is avoided to other Yagis in the frequency range of 14 to 30 MHz.

 

         
OB4-40   4 Element Yagi 40m    
         
Bands   40    
Gain (dBd) *   5    
Gain (dBi) **   11.9    
F/B (dB)   25    
VSWR        
7,00 - 7,06 - 7,10 - 7,15 - 7,20 - 7,30   1,5 - 1,1 - 1,2 - 1,2 - 1,1 - 1,3    
         
Elements (number)   4    
Max. Elementlenght (m)   14.74    
Boomlenght (m)   11.9    
Turning Radius (m)   9.45    
Feedlines (number)   1 Coax 50 Ohm    
Weight (kg)   75    
Windload at 130 km/h   1.200 N / 1,49 m² / 16,2 feet²