[BC] Shunt Feed AM Antennas

[Phil Alexander]

On 27 Feb 2007 at 13:31, PeterH5322 wrote:

> 
> >... as I understand it, the
> >FCC computer is not programmed for slant-wires ...
> 
> As I understand it, a slant wire shunt excited tower doesn't have the 
> circularity required.

Do you know of any study confirming this. While there is a slight (very
slight) minima in the feedwire direction, it can be minimized to virtual
non-existence by use of a non-traditional slant angle.
> 
> In a recent DA installation, a non-DA proof was required in order to 
> confirm circularity, and this was for series excited towers.
> 
> (Current distribution measurements were also required, as the towers were 
> top-loaded).

I must be missing something, but this sounds rather routine for a new DA
with top loading, especially if using guy loading rather than top hats.
Is there something unique about it?

---------------------------------------------
Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037