Topband: Shunt Feed - Insulated Elements on Yagi

Jim Brown jim at
Fri Dec 19 01:03:00 EST 2014

On Thu,12/18/2014 4:59 PM, Ralph Parker wrote:
> I have a 64' self-standing tower with a 3 el Steppir on it (insulated
> elements) and a 40m linear loaded dipole (also insulated) on top of that.
> I've worried that any high voltage on the ends of the boom might be harmful
> to the drive motors in the dir/ref boxes.
> So I've chickened out and avoided loading the tower on 160.

I have a 3-el SteppIR on a 120 ft tower. I don't load the tower, but the 
tower is a reflector for a wire that is suspended from it, insulated 
from it, and slopes to a point on the ground about 50 ft from the tower 
where it is fed against four elevated radials (about 18 ft). This makes 
the top of the tower a high voltage point, although probably not as high 
as it would be if I were loading it). There are two antennas rigged like 
this, one facing the east coast and one facing west. I've been using 
them for about three years, mostly running legal limit, and the SteppIR 
still works fine.

73, Jim K9YC

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