> KHLT 1520 Hallitesville has a humm in it, sounds like a bad
> ground connection from the antenna or something, they had
> that every since they moved the tower, I listen to them
> because they are stronger than both 92.5 or 99.9 cover more
> area.
>
A bad antenna 'ground' at an AM station? I'd like to see that
actually. This is assuming they are actually able to 'get on
the air'.
You see, at an AM station, the antenna system usually has
120 'ground' radials that are normally in intimate contact with
the actual earth or 'ground'.
With an FM station you're taking two or more 'bays' mounted up
a tower, with each bay comprised of at least one dipole antenna.
With an AM station, the physical entire tower is the antenna,
driven by the transmitter, with a ground radial system buried
and an extending out from the center where the tower sits.
Were the transmission line from the transmitter not connected
from the sheild to ATU or antenna ground, the trnamitter would
most likely see a mismatch and the transmitter protective circuitry
would shut the transmitter down and close a pair of 'alarm'
contacts notifying the studio remotely.
I would be more inclined to believe that an audio line into
the transmitter or speech processor has a bad audio line
'pin 1' or 'ground' connection problem (like a broken wire).
