Jan - Palomar Amateur Radio Club
Jan - Palomar Amateur Radio Club
Jan - Palomar Amateur Radio Club
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.<br />
o 160 MHz is shown<br />
A comparison of model predicted SWR and measured SWR is shown in the chart<br />
below. The measured response is shifted down in frequency from the model data.<br />
Some causes of this shift may be the end loading of the PVC pipe, effects of the<br />
mount and feedline, and presence of the person doing measurements.<br />
The pattern<br />
of any gain<br />
a n t e n n a<br />
changes with<br />
c h a n g i n g<br />
height above<br />
ground. To<br />
the right is<br />
the elevation<br />
pattern of the<br />
2m Moxon at<br />
an elevation<br />
of 30 feet.<br />
Compare it to<br />
the elevation<br />
pattern to the<br />
left, where<br />
antenna height<br />
was 50 inches.<br />
SCOPE page 7
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