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4 port PVC array rev 3 (brass rod dipoles)
4 port PVC array rev 3 (brass rod dipoles):
The second revision of portable doppler antenna uses rigid elements but is more durable and waterproof.
The resistor-diode switching is hidden inside the T's, and the brass rods are secured into the end
caps using a plug of hot glue.
  
    
      
          
      
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    |   1 mast top   | 
      2 one dipole   | 
      3 combiner opened   | 
      4 side   | 
      5 combiner closed   | 
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last updated 05/20/2025 at 15:53:58 by make_www_index.command version 2025.05.20.B