[Antennaware] Terminated Vertical
Andy Ikin
andy.ikin at btopenworld.com
Sun Dec 23 06:39:32 EST 2007
Good morning Guys,
It is possible to achieve the same reception pattern of a ground mounted vertical using a 22ft aluminium pole with 2 sloping wires affixed to the top of the pole? Each wire comes out say 15ft from the pole ( 5ft above ground ), then bends back towards the base of the pole and is connected to a ground rod via a 1k resistor i.e. the antenna looks like a single K9AY loop with 2 termination resistors. The insulated 22ft aluminium pole and the ground would be connected to a high Z input bipolar buffer amplifier with common mode feeder isolation choke.
This configuration ( if it works) would provide lower noise than a FET active vertical with higher immunity to static damage! Also the amplifier would see a resistance loaded antenna rather than a small capactance of a whip antenna.
73
Andy G8LUG
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