In option 2, only the feedline radiates. The dipole acts as a capacity
hat. This is called a TEE antenna; it is usually implemented with open
wire feedline. It needs several, like more than 20, RF radials under
the point where the feedline conductors are tied together. With
adequate radials and modest height, it will work better than a low
dipole for DX.
Option 1 will work FB for modest range, 300-500 miles. Performance will
be NVIS, because your 80 M dipole is less than 1/4 wavelength high on 160.
73 de WOØW
>For a temporary, 1-night, 160-meter antenna... please advise if there would
>be much difference in performance between the following 2 options:
>1) Load up a 80-m dipole on 160-m by running the RG-8 feedline through an
>antenna tuner. (unbalanced?)
>2) Tie the rig end of the RG-8 coax together (center and shield tied
>together) and run it through the antenna tuner. The only ground available
>for the an
>tenna tuner/rig will be a couple of ground rods tied to the electric meter
>which is 5' away from the rig.
>It would be quicker for us to go with Option 1 for this 1-night radio
>affair. Neither option is very good but would Option 2 radiate better...
>some vertical radiation off of the coax?
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