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Old June 8th 06, 03:03 PM posted to rec.radio.amateur.antenna
dansawyeror
 
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Default measurements at the antenna

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