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Re: Topband: Daylight QSO's during the SP

To: topband@contesting.com
Subject: Re: Topband: Daylight QSO's during the SP
From: W8AV@aol.com
Date: Mon, 31 Dec 2007 09:15:54 EST
List-post: <mailto:topband@contesting.com>
There is another aspect to propagation on 160 during daylight hours.   In the 
broadcast field it is not uncommon to experience periods of "skywave"  
propagation during daytime hours, especially during the winter months.   That 
is why 
the FCC and the Canadian DOC have incorporated a "critical  hours"  period 
(it's called the "transitional period" in the Canadian  Broadcast Rules and 
pertinent bilateral treaties) into the AM Broadcast  Rules.  It is defined as 
the 
period of time that occurs two hours  after local sunrise and two hours before 
local sunset.  It is possible to  hear broadcast stations from hundreds of 
miles/kilometers away during daylight  hours.  I have even heard broadcast 
stations hundreds of  miles/kilometers with a sensitive receiver during mid day 
at 
certain times  of the year.
 
It is true that there is a greater number of stations on topband than there  
were years ago and there are better receivers and receiving antennas which 
also  add to this phenomenon, as has already been mentioned.
 
73.........de Goose, W8AV



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