Topband: Beverage coax grounding

Bill Tippett btippett at alum.mit.edu
Sat Feb 7 18:08:03 EST 2009


W5UN:

 >My question concerns grounding. Should the incoming 75 ohm coax have
its shield grounded at the 9:1 transformer termination point, or
should it remain floating at that point?

         First make sure you're using an isolated transformer with
separate grounds for input (Beverage) and output (coax).  Ground
the Beverage but leave the coax floating and ground it at your
shack.  If you're paranoid, you can also make a feedline choke
at the Beverage (14 turns of mini-coax like RG-176 around a mix
31 toroid should work).

                                         73,  Bill  W4ZV



More information about the Topband mailing list