This video compares the reception of a full size 40m band 1/2 wave dipole with a open-wire fed doublet 42m long.
Both dipoles are installed on the same roof, the have their vertex at the same height, the have the same inverted-V angle and the same alignment.
The dipole is fed with 20m of RG-213 terminating on a current balun; the doublet is fed through the "balanced" output of a MFJ-949E tuner and 20m of home-made open-wire balanced line.
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