"Ted Jensen" wrote in message
...
Does anyone know where I can obtain a plot of the antenna pattern for
a major (50,000 watt) commercial broadcast station?

www.radio-locator.com

Note that the maps are careful labeled "for entertainment purposes." They
are not totally accurate,a nd very,very, very exaggerated. On AM, the only
useful contour is the innermost circle... and it is actually bigger than
reliable reception areas really are in most cases. The outer two circles are
totally meaningless.

This only assumes you are in the US, one of few places where "major" and
"50,000 watt" are synonymous.

On 3 Oct 2004 00:29:17 GMT, Ted Jensen wrote:

Does anyone know where I can obtain a plot of the antenna pattern for
a major (50,000 watt) commercial broadcast station?

Go to www.fcc.gov. There's an AM database that has the information and
patterns for all stations.

Rich

Rich Wood wrote:
Does anyone know where I can obtain a plot of the antenna pattern for
a major (50,000 watt) commercial broadcast station?

Go to www.fcc.gov. There's an AM database that has the information and
patterns for all stations.

Y'know, that's where I was going to send him, but...

The patterns *aren't* there.

OK, there's a table that shows the relative field every (5? 10?) degrees
of azimuth, and I suppose you could plot it yourself.

For FM and TV stations, they *do* have the DA patterns...

I usually use Bob Carpenter's AMSTNS program.
http://home.earthlink.net/~lvehorn/
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com

The patterns *aren't* there.


They used to be ... deleted as a "Y2K" cost saving measure.



OK, there's a table that shows the relative field every (5? 10?) degrees of
azimuth, and I suppose you could plot it yourself.


They were every 5 degrees, with both theoretical and "standard pattern" ...
plus "augmented" pattern, if augmented.

Also, the precise bearings of the pattern minima and maxima were provided,
including any local maxima and minima.

On 4 Oct 2004 06:06:23 GMT, Doug Smith W9WI
wrote:

Y'know, that's where I was going to send him, but...

The patterns *aren't* there.

That's strange. My copy has them.

Rich

Ted,

Does anyone know where I can obtain a plot of the antenna pattern for
a major (50,000 watt) commercial broadcast station?

Plenty of them at www.radio-locator.com
--
Philip de Cadenet - London, SW3
Transmitters 'R' Us
http://www.transmittersrus.com

"Ted Jensen" wrote in message
...
Does anyone know where I can obtain a plot of the antenna pattern for
a major (50,000 watt) commercial broadcast station?

Ted-




Try http://www.fccinfo.com


GST