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1- Jay has done some specific testing of gamma vs beta matches on beams.  His testing shows better results with the beta / hairpin match.  You can look at some the details on his site: www.a1antennas.com.  I'm sure he'll chime in here for more details.  I believe he is making a "bolt on" matching system that will be available soon.




2 - The "RF choke" as you put it is a type of balun.  It's purpose is to eliminate common mode current along the coax which will screw up the beam's signal pattern.




Moleculo



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