I blind copied Scott Fybush on my last post and he has kindly answered some
of my questions.
> The inconsistency with the 900 watt day/1000 watt night application at
KYPA
> most likely has to do with groundwave protection to KWKU 1220 or KEZY 1240
> (or perhaps both). Because the KBLA site (overlooking Dodger Stadium at
> Chavez Ravine) is slightly closer to KWKU and KEZY and the antenna will be
> much more efficient there, KYPA's day signal can't send any more
> interference to 1220 and 1240 than it's already doing from the current
site
> - and since class C stations on 1230 are nondirectional, they can't use a
> DA to cut back radiation in those directions, so instead they crank it
back
> to 900 watts by day. There's no protection for night skywaves on class C
> signals, so they can throw it back to 1000 watts at sunset. It won't make
a
> bit of real-world difference in the signal.
>
> (It's worth noting, however, that the flat-top horizontal antenna that
KYPA
> now uses has a directionality to it, even though it's on the FCC books as
> non-DA. KYPA seems to do exceptionally well out towards LAX, and there's
> probably an equal lobe in the other direction, up towards Glendale, and
> therefore nulls perpendicular to those lobes.)
>
> Oh, and as for the Arcade Building ("KRKD") tower, the word is that they
> did indeed try operating from there but were unable to tune the old tower
> to produce a usable signal.
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