Comparisons
of
doublet
and
whip
take-off
angles.
Conclusions: For short range communications (0-250 miles) the doublet
is best for two reasons: Better take-off angle (straight-up) while
the whip's lower take-off angle skips over the receiving station.
Also a 15-foot whip has a power loss because it doesn't equal the
correct length for frequencies below 15 MHz.
The 32-foot whip also
has a loss for frequencies below 7 MHz. Even for frequencies that a
whip has no loss, a whip's low take-off angle eliminates its use for
short distance communication.
CONCLUSIONS
The doublet is the best reliable (90 percent) antenna up to 1,000
miles; 1,000 to 1,500 miles it's 50 percent reliable.
The 15-foot whip is 20 percent reliable overall.
Best hours 10-12
hours. Worst hours 22-06.
The 32-foot whip 50 percent reliable overall.
Best hours 08-18.
Worst hours 18-06.
15/32-foot whip best performance range is 250 to 500 miles.
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