[BC] Station with the slant wire feed (with picture)

[Cowboy]

On Monday 09 February 2009 02:08 am, Milton R. Holladay Jr. wrote:
>  If this were my project, I would insist on grounding all those coaxes right 
>  where the slant wire attaches to the steel, as well as at the top and 
>  bottom, so that the whole affair is strictly a single vertical radiator, 
>  electrically..........................................
>  M
>  
>  From: "Dana Puopolo" <dpuopolo at usa.net>
>  
>  Under the conditions you speak of, it might even make more sense to hit the
>  coaxes with the slant wire then the tower. Essentially what you have is a
>  copper rod running up the tower to a certain height. Since the copper line 
>  is
>  one piece and conducts better then steel, it might work better then attacing
>  the feed to the steel tower. Of course, the lines MUST be well bonded to the
>  tower all the way up to minimize/eliminate circulating currents. At least 
>  once
>  per tower section at a minimum.
>  
>  -D

 Since all of the conductors appear in parallel as far as the RF currents
 are concerned, feeding the coax shield(s) is irrelevant. The currents
 will be there anyway, which is why adequate ground kits are a must.
 I'd make certain there are at LEAST three, top, bottom, center, but
 in no case separated by more than 45 degrees. 
 If this is done, there won't be any "circulating" currents.
 Perhaps additional in very near proximity to the wire attach point, though
 I find that less important than some might think. It's not necessarily
 the current loop.
 It would benefit one to think of the current as being the resultant, not
 the cause, of the traveling magnetic field along the structure.

-- 
Cowboy