WOW!!! That WBAP 820 in Dallas must be one of the original stations in the U.S.
Its 50kw anytime is on a single stick with no augmentation. And the size of
that tower... 192.10 degrees! That's over a half wavelength (180 degrees) tall.
The angle of radiation should be lower than that of most stations. It'd be a
good station for newbie MW DXers to look for at night
I checked on my Houston area anytime 50kw, KTRH 740, and it's puny in
comparison. It uses a cluster of 4 antenna towers with augmentation, to take a
nip here and a tuck there, to protect other stations. At night, the pattern is
changed, for the same reason. The towers are only 75 degrees tall, less than a
quarter wavelength (90).
I found the Dallas station I was thinking of. It's KFXR 1190. 50kw day, 5kw
night. During the day, it uses 4 towers inline, with 13 augmentations (ground
radials, I presume). At night, it uses 12 towers(!), different from the day
towers and aligned in a different direction. And it uses a whopping 28
augmentations!!! The day towers are 96d tall, the night towers are 87.2d tall.
They must have a good income at night to go to all that trouble for 5kw.
For those who don't know about it, MW AM station info can be found at:
http://www.fcc.gov/mb/audio/amq.html
Type in the state and call letters, when looking for a specific station, and
then scroll down and request the detailed report. The site gives a number of
options that can be used for searching the FCC data base.
Bill, K5BY