Antennas Can Be A Total Mystery

What can I do to make this old antenna work to its maximum potential? : r/cordcutters

5/8 Vertical Ground Plane antenna for 10 meters - IW5EDI Simone - Ham-Radio

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ALPHA DELTA DX-20 - 20 M Dipole Antenna, Monoband, Adjustable, 2,000 W

W5GI Mystery Antenna - IW5EDI Simone - Ham-Radio

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CQ amateur radio - W5GI Mystery antenna - The

Need help identifying this antenna

Antennas Can Be A Total Mystery