DX Engineering DXE-RCA8B-SYS-4P Manual page 27

START
D
Zapped by lightning
pulse or RF overload
E
Damaged due to
lightning
F
Damaged by animals
or insects
A) Broken and/or shorted conductors due to animal, weather or other damage, including chewed,
punctured, stretched and broken control and power lines and/or feedlines for the system and
each antenna. Also, screws in the green removable connectors can inadvertently be tightened
onto the insulation of control or power conductors.
B) Regressed center conductors in the feedlines causing disengagement from the female center
capture pin of the F connector. This can happen in delay lines as well as in antenna or main
feedline connections. Many times a compression F connector that seems to have a long enough
center conductor when it was first made, has regressed to the point that it is not long enough to
make proper contact. A properly installed F connector should have the center conductor
protruding 1/4 inch beyond the shell when viewed from the side. Check all F connectors!
C) Shorted or opened conductors caused by water migration into a control line or a feedline.
Over 80% of all Receive Eight Circle malfunctions have been caused by the above system
problems. A thorough inspection and subsequent testing of each control cable, RF cable, and
their respective connections, will uncover the cause of most Receive Eight Circle troubles.
Here are a few other causes for Receive Eight Circle malfunction:
1) One or more burned out Active Vertical Antenna units model AVA-2 or AVA-1, due
to lightning pulse or high power RF overload. One-half wavelength on the lowest
80% of all Receive Eight Circle malfunctions are caused by
A
Animals, Chewed,
Punctured, Stretched,
Broken/Shorted
Conductors
Check all F connector
B
center conductor
Center Conductors
wires. They may have
Slipped
C
Check feedlines and
Shorted/Open
conductors due to
water
Make sure units are at least 1/2-
wavelength, on the lowest frequency,
away from any transmit antenna.
Rare, but it can happen.
Animals have been known to relieve
themselves on the units and the urine
will corrode and damage electronics
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Green Connector may have
broken wire or is tightened
or Broken against insulation - not bare wire
pulled inward.
control cable.
May want to use an optional
DXE-TVSU-1 Time Variable
Sequencer for AVA-2 units.
Insects getting inside units and
A, B C
or
shorting out electronics