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Thread: Simple and efficient Top Loading for short 160 meter vertical..

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  1. #4
    Orca Whisperer PA5COR's Avatar
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    As can be seen on another post from me (http://forums.hamisland.net/showthre...cal#post203031 ) i opted for a helically wound vertical part, 14 meters high and 2 times 12 meters top head wires, or a T antenna, directly fed against ground with coax. ( ALSO KNOWN AS UMBRELLA )

    You can simply add a coil to an OCF ( 80 - -10) and with an wire of 10 - 30 feet make it working fine on 160, as i also did.
    The horizontal FD-4 works as NVIS, the vertical has a good groundwave up to 50 miles, then needs 300 miles to work better as the NVIS FD-4.

    For the vertical i dug in 1000 feet of wire on my plot in every nook and cranny i could get it, and with help from some neigbours put out a few lengths under their plot.
    Both work fine, 100 watts worked all Europe, North Africa, will extend the vertical this summer, and see the results next winter.
    Both antenna's can handle the 1000 watts of the SB-1000, but normally i run 100 watts.

    ;)
    Last edited by PA5COR; 05-30-2010 at 07:20 AM.
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