Comparisons take-off angles for various frequencies for the same
antenna height.
Notice that for short distance (250 miles)
communication A 3 and 9 MHz will work fine, but that an 18 MHz will
skip over the receiving station. A better antenna height would be 15
feet. For short distance communication we want our radiation pattern
basically straight up (50 degrees either side of straight up).
TAKE-OFF ANGLE
HALF-WAVE DOUBLET ANTENNA VERTICAL PATTERN, HEIGHT 25 FEET
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