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Approximate Active Antenna Power Line Lengths (4 active antennas on at any one time).
Minimum Copper
Wire Gage (AWG)
Length
18
300 Feet
16
500 feet
12
1,200 feet
10
2,000 feet
Receive Eight Circle Active Vertical Elements
The
DXE-R8C-SYS-V3
Eight Circle Array is supplied with one DX Engineering model
DXE-
RSEAV-8
which consists of eight identical
DXE-RSEAV-1
Receive Short Element Active Vertical
antennas. Featuring the updated
DXE-AVA-3
Active Matching Units, the
RSEAV
antenna offer
excellent broadband receiving performance from 100 kHz to 30 MHz. In addition, the
RSEAV
provides a clean, low profile installation using aluminum antenna elements. DX Engineering’s
unique design makes it vastly superior to other amplified and traditional active antennas in both
strong signal handling and feedline decoupling. You get significantly better weak signal reception
due to lower spurious signal interference and reduced noise.
The
DXE-AVA-3
Active Matching Units ground the antenna element when power is turned off.
The active antennas allow installations with spacing from transmit antennas less than 1/2
wavelength but more than 1/10 wavelength (on the lowest frequency). Close spacing of the array to
transmitting antennas can be done, but will impact overall receive array system performance. Sites
without sufficient land area for proper spacing should use these verticals, which may be installed in
close proximity to transmitting antennas (1/10-wavelength of the lowest transmitting frequency).
This is possible, provided the active units are powered off at least 5 ms before transmitting. An
optional sequencer such as the
should be used to ensure the correct transmit to
receive switching
Your eight identical
DXE-RSEAV-1
Receive Short Element Active Vertical Antennas are self-
supporting and insulated from the ground rod that is typically used as the ground mount. The
vertical element is connected only to the positive terminal of the
DXE-AVA-3
Active Matching
Units, and the negative terminal must be connected to at least the mounting ground rod. Two
ground rods may be needed in some soils. The Active Receive Verticals normally do not need
ground radials, however, depending upon the conductivity of the soil, in sandy soil or rocky soil
installations, wire radials may be required.
The Active Receive Verticals should be installed with their feed points as close to the ground as
possible but above any standing water. The level of snow cover over the feedpoint and the active
vertical is not an issue. If you are planning to use the array on the 160 meter band, the Active
Antenna internal gain jumper can be reset as discussed shown in the DXE-AVA-3 manual. If the
array still lacks sensitivity on the lower bands, then a preamplifier with high dynamic range can be
used to compensate for the low signal level. However, using a preamplifier when sufficient signal is
already present may result in amplification of the noise along with the signal. It is always best to use
the least gain possible.
Summary of Contents for DXE-R8C-SYS-V3
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