MFJ-1026 Instruction Manual
Deluxe Noise Canceling Signal Enhancer
11
WARNING: Transmitter output applied to the RADIO connector appears only on the MAIN
antenna connector. If the transmitter RF is routed through the MFJ-1026 (in other
words, if the MFJ-1026 is connected to the normal antenna output port of your
transceiver), connections to the MAIN and AUXILIARY antennas can not be
reversed.
In order to null or peak a signal, both the MAIN antenna and the AUXILIARY antenna must "hear" the
same signal. If the same noise or signal is not present on both antennas, noise or signals can not be
properly nulled or peaked. This requirement may require installation of a special antenna near the noise
source to null unwanted local noise signals, or require installing a separate low noise receiving antenna
to enhance desired distant signals.
Grounding Considerations
Connect the MFJ-1026 to the station ground buss with a short ground connection. Always use a good
station ground connection to reduce the risk of lightning damage to station equipment, improve
performance, and to improve operator safety.
Adequate lightning protection can be obtained by burying coaxial feedlines
directly
in the ground for 20
feet (or more) before the feedline enters the building. In addition, the feedline's shield should be
grounded to the station ground at the point where the feedline enters the building. Failure to follow
these precautions will increase the risk of lightning damage to equipment and reduce safety.
The station's ground should consist of at least one copper ground rod driven into the earth a minimum of
6 feet. Multiple ground rods and buried wires are superior to a single rod for lightning and RF
protection.
Never use woven conductors or flexible braiding for ground connections unless
absolutely necessary
.
Braiding has high resistance to RF and lightning. Copper flashing, wide copper foil, or large gauge non-
stranded copper conductors (even if hollow) are the best materials for use in RF and lightning grounding
applications. Never ground a two wire balanced feedline on the antenna side of the balun.
In-line coaxial lightning arrestors offer a minimal improvement in lightning protection. The best method
of protecting station equipment is to
disconnect
the feedline outside the building during threatening
weather or when the station is not in use.
