[BC] STL Options

[DHultsman5@aol.com]

In a message dated 2/23/2006 11:31:10 AM Central Standard Time,  
kwinrich at gmail.com writes:

You know  that is one thing I have not looked into...the inversion 
layers.  I  would think they would form at different levels, but 
**typically** where  do they form?

I have one station that has major fresenel issues in the  summer 
time.  I need to look into this  further.





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To really protect yourself from the inveerson layers it is wise to propose  
dual receiving antennas at different levels.   ie;  4 ft. dish at  the higher 
level and a 6 foot dish at about half the height.  Moseley   makes an 
automoation switch and the newer receivers have built-in diversity  switching.
 
The inversion problems are very common along the Gulf Coasts of Texas thru  
Florida.
 
I recall one station in Ft. Meyers that shared a 950 frequency with a  
station in Tampa.
The transmitt beam was 90 degrees away from the patch to the Ft. Meyers  
station.  The typical Grid dish also had radiation off the sides + and - 90  
degrees to the major as well as a significant amount off the back side.
 
In this case the inversion came in off the Gulf and the south side lobe of  a 
Tampa Rocker's morning crew was picked up by  the religious station's STL  
receiver between Ft. Meyers and Naples.  The transmitter control was  also 
carried on the STL so they could not turn it off without going to the  transmitter.
 
That same morning Channel 6 in Orlando wiped out Channel 6 in Homstead in  
moset of Broward and Dade counties.  STL's all over the douthern half of  the 
state has problems with other signals and noise levels.
 
The new Backup audio CD players and harddrive systems loaded with your  
format at the transmitter makes good sense in these cases.  Especially  if you have 
a dial up or TCP/IP remote control available.
 
Dave