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A DX Engineering 4 Square or 8 Circle will require approximately 250 milliamps (only 4 actives
are powered at any one time).
When calculating line length, take into consideration the total number of active antennas being
powered at any one time in your line length calculations.
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
Coaxial Cable Feedline
Flooded 75 Ω CATV type feedline cable (F-6) is strongly recommended for use with the
ARAV3
systems.
DXE-F6
Flooded 75 Ω CATV type feedline cable has a bonded foil to improve shielding.
Moisture typically seeps in around the shield and can cause increased noise. Flooded style cables
have the distinct advantage of automatically sealing small accidental cuts or lacerations of the
jacket. Flooded cable also prevents shield contamination and has a gummy liquid inside that seals
cuts or nicks, displaces water, and can be direct buried.
The feedline is used to provide power for the
ARAV3
's matching unit. We
recommend the use
of
DXE-SNS6-25
Snap-N-Seal type F connectors to
ensure high quality and weather resistant feedline connections. Use the
proper tool to crimp these connectors.
To help decouple the feedline from radiated noise, bury the feedline for some distance from the
antenna when the feedline reaches the ground. A
DXE-RFCC-1
DX Engineering Receive Feedline
Choke will also ensure feedline decoupling, which may be installed in-line, preferably at the station
end.
Low Frequency Response - Internal Jumpers
The sensitivity response of the
ARAV3
system does not need to be changed for most installations
above 3.5 MHz. However, if you are interested primarily in frequencies below 3.5 MHz, jumpers
may be required to optimize or increase sensitivity or eliminate interference from strong broadcast
stations.
Set the jumpers to the lowest operating frequency desired.
Refer to
Figure 9
for
various jumper settings.
