A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.
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About 20m Half-Wave End Fed
The resource is currently listed in dxzone.com in a single category. The main category is EFHW End Fed Halfwave Antenna
that is about EFHW End Fed Halfwave Antenna.
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