[BC] Long Wave

[RLO2L@aol.com]

In a message dated 2/10/2006 10:12:10 P.M. Central Standard Time,  
Towers at mre.com writes:

That's  an outer or inner marker for an airport approach in the foreground 
and  possibly a LORAN NDB/VORTAC TX tower.  Much like the one along I-290  
here just north of the I-355/I-290 interchange.

This one is simply  a WHOLE lot older.



Guys:
 
The short tower along I 290 in the west suburbs of Chicago is the co  located 
outer marker
(they "Y" shaped antenna), and sends a dog-bone shaped signal pattern  
upwards on 75 Mhz. 
Outer markers are modulated  with as I recall a 440 Hz. tone and a  dash-dash 
pattern.
This illuminates the Amber OM in an aircraft passing overhead and indicates  
OM passage.
Generally about 5 miles from touchdown point. In this case it is for the  
Runway 9 Right approach.
 
The taller antenna 30-50' is the NDB antenna and broadcasts on 350 Khz. It  
is called Deana!
It used to have avaition weather broadcasts but that was removed some years  
ago. 
The morse code identifier is ME.
 
I believe that there are only three of four of these still in service in  the 
Chicago area, Ermine or HK at 335 Khz is out east of Roberts Road and just  
north of 95th street. It is one of Midway's new approaches, Kedzi,  MX 248  
kHz. is out in a residential area south east of 
Midway, and Taft just east of and on the property of Taft High school just  
north of 90 west
and about 5 mile east f O'Hare's Runway 9 approaches. It is still on the  air 
bot not on the Chicago sectional chart.
 
An old pilot.
 
 
 
Russel L.  O'Toole, P.C.
R&M Consulting

31 Ponderosa  Drive
Romeoville, Illinois 60446
815-372-1990 voice
630-699-2965  cell
815-886-9232 fax
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