There's more nonsense, old wives tales and gobbledegook generated by
THAT antenna than all other antennas put together.

Just erect the longest and highest dipole you have space for and feed
it with 450-ohm open-wire line all the way to the shack. If you don't
have a balanced tuner, use an unbalanced tuner with a choke balun. An
unbalanced tuner will probably be better anyway.

To lengthen a dipole make an inverted-U. Or make a Z with it.
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Reg.