24-09-2016, 05:03 PM
Hi Scott
It's interesting that some of the Sunny Coast stations can work 4AFL at S9+20 or more from home but virtually no one else in Brisbane.
From a pure technical standpoint lets drop Trevors station down to the average station. Reduce antenna gain from 27dBi to 18dBi - 9dB difference.
Drop his Tx power from 200 watts to 15 watts (IC910H etc) - 11dB
All up Trevor has a 20dB advantage over the basic station - thats just over 3 "S" points.
So drop his S9+20 (or more) by 20dB then the basic station in Brissy should be S9 up here.
How come virtually none are audible. In my caseI have terrain issues (Glass House Mountains) but when stations on the coast don't do any good it has me wondering why.
It's interesting that some of the Sunny Coast stations can work 4AFL at S9+20 or more from home but virtually no one else in Brisbane.
From a pure technical standpoint lets drop Trevors station down to the average station. Reduce antenna gain from 27dBi to 18dBi - 9dB difference.
Drop his Tx power from 200 watts to 15 watts (IC910H etc) - 11dB
All up Trevor has a 20dB advantage over the basic station - thats just over 3 "S" points.
So drop his S9+20 (or more) by 20dB then the basic station in Brissy should be S9 up here.
How come virtually none are audible. In my caseI have terrain issues (Glass House Mountains) but when stations on the coast don't do any good it has me wondering why.