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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
frequency is the minimum distance between the Active antennas and any transmit
antennas. If that distance is less and high power is used, then the Time Variable
Sequence Unit, model DXE-TVSU-1A (or B) must be used to interrupt power to the
AVA-2 units.
2) Damaged Receive Eight Circle unit due to lightning. This has been reported only a
couple of times and is not very likely.
3) Active units that were damaged by animals. Once we received actives damaged by
an animal that relieved themselves on the antenna whips and AVA units, as if they
were “trees”.
The above items are the most common failure points in the system needed to be checked.
If necessary, the following further troubleshooting procedure may assist in finding the malfunction.
