In article ,
Richard Clark wrote:

Of necessity due to wavelength, your ground must be spread out (not
buried) to one quarter wavelength.

Richard-

I have a steel well pipe that is approximately a quarter wave on 40
Meters. Even though it is buried, why wouldn't this work as the bottom
half of a vertical dipole?

I tried it with a mobile whip as the vertical element. It worked better
than I expected, but not really well.

Fred
K4DII