From: Charles Stampf (n2cj@arrl.net)
Date: Thu Mar 20 2003 - 20:09:02 EST
>>Robert Rathbone KG4WKM Florida
>> said
>> Both vertical and Yagi antennas have gain.... each Db of gain increases
the signal 10 >>times. Thats why a discone which does not have any gain at
70 feet is as good as
>>one at 20 feet. Even though it is up much higher and should see farther
>?the signals from far away are too weak to be picked up by the
>>discone. This is not true for a vertical or yagi antenna.
This is inaccurate. Doubling the received signal would result in 3 db gain
(1/2 an S unit). In VHF/UHF the practice is to raise the antenna as high as
possible, especially if the antenna provides unity gain. There is a point
of 'no return' however. The losses in some cables can negate the increase
in signal levels.
I've always followed the policy when dealing with VHF/UHF....."Use as good a
cable as possible and get it up as high as possible". Discones are
excellent antennas for the PCR-1000.
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