Thank you all for your replys, they were all interesting.

The first set of test measurements were taken on a 2-meter loaded vertical. Two
voltage readings were taken via a high impedance scope probe, one at the
feedpoint of the coax center connection, and the other from the connection of
the coax shield to the antenna ground. In this case the ground is a simple
raised metal 1/4 inch screen mesh about 10 square feet.

The antenna was tuned to resonance. The relative voltage readings were the
center conductor was 2x the ground reading. I do not have a way to measure
current at the base at this time.

However looking ahead, with power = iv would this imply about 2 times the energy
is being radiated from the vertical element as through the base?

Thanks Dan - kb0qil

dansawyeror wrote:
Good morning,

This question is: Taking measurements at the antenna and what they mean?

The antenna is a loaded vertical over a set of untuned radials. The feed
is 50 Ohm coax with a 1:1 isolation transformer at the antenna. I intend
to run a separate coax for measurement purposes to the feed point,
stimulate the antenna with a 10 mw signal at the operating frequency,
and measure the voltage across the antenna feed and the ground connection.

Will the voltages indicate the relative RF impedance of antenna
(including loading coil) versus the ground? If the ground were near
perfect the voltage at the feedpoint should be close to zero. These
voltages should indicate the power disapation difference between the
antenna and the ground.

Thanks,
Dan