[Antennas] Log Periodic

[Cletus W Whitaker]

de  WB2CPN  South Central Pennsylvania    2002.05.24

As you say, the two parts of the boom are insulated from the mast, so they
are "ungrounded", and the coax shield connects to one of the boom sections,
so the coax is not "grounded", or at least not there.  BUT, the bead balun 
is between the boom and the coax that goes down to your shack.  Among other
things, the bead balun is the demarcation between what can be "grounded" 
and what can not be "grounded".  You may "ground" the coax cable, (there are
a few reasons why I don't recommend this), anywhere between your shack and 
the bead balun. Just don't do it BETWEEN the bead balun and the antenna boom.    
Sometimes bead baluns can be avoided by running the coax up through the
inside of one of the booms and connecting it at the far end.  When I say
"ground", above, I mean a large piece of metal nearby.  Such as the mast. 
I don't mean the stuff they grow flowers in, that's what you "ground" the
things in your shack to.         73  Clete