- 10 -
One and three in-phase:
Figure 10
EZNEC+ ver. 5.0
--------------- SOURCE DATA ---------------
Frequency = 7.1 MHz
Source 1
Voltage = 168 V at 41.76 deg.
Current = 5.985 A at 0.0 deg.
Impedance = 20.94 + J 18.7 ohms
Power = 750 watts
SWR (50 ohm system) = 2.781 (75 ohm system) = 3.822
Source 2
Voltage = 168 V at 41.75 deg.
Current = 5.985 A at 0.0 deg.
Impedance = 20.94 + J 18.69 ohms
Power = 750 watts
SWR (50 ohm system) = 2.781 (75 ohm system) = 3.822
Total applied power = 1500 watts
The next band above the design-spacing band, such as 20 meters with 40 meter optimized spacing,
can have some use if elements are trap verticals.
With vertical arrays, spacing errors limit available gain and directivity on bands below the optimum
spacing band. Although trap antennas would still work and produce a little gain, patterns on bands
below the optimum-spacing band show very modest directivity.
