First thanks for the many replies to posts I make here. I enjoy the
dialogue and am fortunate to have access to the knowledge and
experience here.

Other than my MFJ-259B and my DMM, the only other piece of test
equipment I have is an oscilloscope. Would it be possible to wrap
several turns of light gauge enameled wire around the jacket of the
coax at my operating position, attach the oscope probes and detect and
possibly measure the amplitude of any common mode currents?