> > This is very interesting to me. I've always done work with
> > FM and TV, but never AM...
> Fewer and fewer competent AM directional engineers survive
> each year.
> I only ever messed with one two-tower rig and it was stable
> year after
> year, so I never got much real experience with it.
> Working around others with multi-tower arrays I reached my
> conclusions: 1. If you want job-security work for a
> station with
> a 3-tower array so you can chase the pattern all over the
> 2. Directional AM antenna science is an oxymoron. It's all
> > Is there a recommended read to further explain AM arrays?
> I won't say there are none; just that I have never seen one
> did not have extremely advanced mathematics as prerequisite!
I've got a 5 tower DA-2. You are correct, it is ALL black magic!
The other thing to remember about DA's - a slight change in one tower can change the parameters of all the rest! I would say an infrared thermometer, FIM, and a very good knowledge of the DA you're working on are major requirements!!
I've become pretty good at DA's over the years, but I've had real smart guys who taught me.