[BC] FM bays

[Broadcast List USER]

#1, though maybe it isn't the best you could do.

Half way spacing is by far he best. It reduces the signal up, and DOWN.

The fewest number of bays gives one the "thickest" signal.  That is  
the best.

You don't want minor lobes, as they result in perceived multi-path.

Having written that, FOUR bays at .75 Lamda is not THAT bad.  The  
downward radiation is pretty much canceled out.

AGL doesn't matter.  HAAAT is what matters.  You can be at 10 feet  
AGL but 2.000 HAAT on some mountain top.

I cannot figure out what you are doing from what you have written,  
but in general, the fewer the number of bays, the better.

The fewer bays, the fewer minor lobes, and the fewer multipath problems.

The closer to 1/2 wave spacing the better.

There are other things that work well, but it becomes a bit complex  
to convey in an e-mail.

On Feb 11, 2009, at 9:30 PM, broadcast-request at radiolists.net wrote:

> Message: 10
> From: Mglin at aol.com
>
> Well some of you know the best answer for this.  Your help is   
> appreciated.
>
> Here is the question.  I am upgrading my FM  C3  25 KW  ERP   
> 245'AGL, moving
> to 328' AGL
> Currently using OMB 6 bay with 9.5 KW TPO.  Bays are .75 spaced
>
> I have received three different recommendations from people I trust.
>
> #1  reduce the number of bays to 3 and increase TPO to 20KW
> #2  stay at 6 bays and install a new antenna
> #3  increase to 8 bays and reduce TPO more.
>
> My target cities are 13-15 miles from the tower site and the  
> terrain is
> relatively flat.
>
> Mike
>