You do realize, of course, that the reading you get will depend on how
you've oriented the coax. Which orientation would provide the "correct"
answer? And why?

Roy Lewallen, W7EL

Richard Harrison wrote:
. . .
I think the voltage may be measured at the end of a dipole using a diode
probe spaced from the dipole by an insulator. The ground return can be
provided by the exterior of a 1/2-wavelength coax which is well
grounded.
. . .