"Telamon" wrote in message
...
In article ,
"Brenda Ann" wrote:

"Telamon" wrote in message
...

I would say bandwidth. Large aspect ratio antenna elements have a
narrow
band of resonance. It seems to me that there are some companies out
there that have tower kits that run 3 to 4 wires on spreaders so the
electrical diameter of the tower is increased. This will allow the
tower
to have lower VSWR over the +/-15KHz required.

I've been in on installing one of those kits.. lot of fun when you have
the
backup tower for the station only a few dozens of yards away.. you don't
want to forget to connect that ground in at least two places on the way
down
the tower..

That's great. Tell us how it works out when you tune it up.



This has been about 8 years or so ago now, at the 970 AM site in Portland,
OR. We didn't do the tuneup, that was left for their CE to do. We did the
tower work.

I've had the opportunity (mostly doing grunt work) to work around lots of
high energy RF. I had the really fun job of resplicing all the ground wires
at the former Sunny 1520 (also a Portland market station) during a new site
install. We built the new transmitter shack (moving the 50KW box out of the
back room of a preschool of all places). I got to, as I said, reattach all
the radials, about 300 of them, on a 3 tower system, then, when the concrete
and block work were done (in different stages) I had to lay expanded copper
mesh on the foundation, walls and roof of the shack (Faraday cage). Then I
ran a few thousand feet of 50 pair icky-pick for control wiring. All this
fun in August. Sure loved the $$$ though..