Michael wrote:
Hiya....

This leaves me with yet another AM broadcast question. I'm interested to
find out what 50KW AM broadcast stations http://www.ac6v.com/clearam.htm#USA
(not in your state, or at least 200 miles away) are in fact reliable and
listenable to you ???

Also take into account that many stations use directional antennas.
Given that scenario you may be able to hear the 5kw guy but not the 50kw
from the same city depending on whether or not the lobe favors your
direction.
Most of the old (what used to be actually clear) clear-channel stations
are omni-directional.
-Bill

Most of the old (what used to be actually clear) clear-channel stations
are omni-directional.

A while back, I looked up one in Dallas and it has a humongous array for
daytime and an entirely different almost-as-large array at night. The pattern
must look strange on each, and each are sort of directional.

I think I'll go back and try to find in my files the call sign of that station
and then recheck on it.

Bill, K5BY

(WShoots1) wrote in message ...
Most of the old (what used to be actually clear) clear-channel stations
are omni-directional.

A while back, I looked up one in Dallas and it has a humongous array for
daytime and an entirely different almost-as-large array at night. The pattern
must look strange on each, and each are sort of directional.

I think I'll go back and try to find in my files the call sign of that station
and then recheck on it.

Bill, K5BY

Maybe WBAP-820? They had always been one of the bigger clear channels
out of Dallas. MK

Mark Keith wrote:
(WShoots1) wrote in message ...

Most of the old (what used to be actually clear) clear-channel stations
are omni-directional.

A while back, I looked up one in Dallas and it has a humongous array for
daytime and an entirely different almost-as-large array at night. The pattern
must look strange on each, and each are sort of directional.

I think I'll go back and try to find in my files the call sign of that station
and then recheck on it.

Bill, K5BY


Maybe WBAP-820? They had always been one of the bigger clear channels
out of Dallas. MK

No, WBAP is non-directional.

My guess is he was looking at KFXR-1190. (long known as KLIF) IIRC
they use *twelve* towers at night - they have fewer towers for daytime,
at a different location.
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

Maybe WBAP-820? They had always been one of the bigger clear channels out of
Dallas.

Thanks, Mark. I'll check that out asap. I wrote it down, to remind me to check
for that Dallas station I have in mind. It and WBAP may be the same.

Bill, K5BY

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