17
Start
Check Internal
Jumpers
A
Broken/Shorted
Conductors
Animals, Chewed,
Punctured, Stretched
or Broken.
Green Connector may have
broken a wire or is tightened
against insulation - not bare wire.
B
Center
Conductors
slipped
Check all F connector
center conductor
wires. They may have
pulled inward.
C
Shorted/Open
conductors due
to water
Check feedlines and
control cable.
D
Zapped by
lightning pulse or
RF overload.
80% of all Receive Four Square
malfunctions are caused by
A
,
B
or
C
Make sure units are at least 1/2
wavelength, on the lowest frequency,
away from any transmit antenna.
May want to use optional
DXE-
TVSU-1B
Time Variable
Sequence Unit for AVA-2 units.
E
RFS-3 damaged
due to lightning.
Rare, but can happen
F
Damaged by
animals/insects.
Animals have been known to
relieve them selves on the units
and the urine will corrode and
damage electronics.
Insects getting inside
units and shorting out
electronics.
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 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!
