Instructions
:
Cubex - MARK II Series
Cubex Co., Inc.
06-03 Rev 9
Pg. 9
Additional Notes on feeding:
Separate lines are to be preferred over the simplified “Single FEED LINE” method to a
common junction point of elements. This is not to say that the “SF” system is unacceptable,
but one must be prepared to accept some SWR compromise when using it If difficulty is
encountered in LOADING and/or SWR with either system.
FEED LINE PRUNING should be attempted as the NUMBER ONE approach when using
the “SF” approach.
Baluns are generally not needed and have proven effective in only a small percentage of
unusually rough situations. Fortunately, the great majority of quad installations perform very
satisfactorily without the need to resort to complicated matching systems, but in an
occasional "rare" case of difficulty, the Gamma Match (either individual or Tri-Gamma) has
proven to be a good solution. For Gamma Match information see historical notes at end of
instructions, or refer to Bill Orr’s book on Quads.
Fig. 3a
Alternate method-Line Splice
Reflector / Director
Connections - splice
or crimp sleeve
Locate the small bag of crimp sleeves (5 +1spare).
After completing the wiring of the Reflector and Director elements the ends must be connected to
complete the Quad loop. Slide both ends through the sleeve as shown in fig 3b. Pull wire through
to eliminate the slack in the wire. Temporarily fold each wire end as above to hold the wire
position. Check the tension in all of the sides of this element, making sure that the arms are
"square" and in line. Make an adjustment at the sleeve and if satisfied Crimp, or solder the element
wire into the sleeve. This technique allows you to get the element wire tension correct without
committing to a wire wrap or crimped connection.
Trim wire ends after
completing adjustment of
tension
Pull wires through sleeve and bend to
temporarily hold position
"Line men's" Splice
Connecting Element Wires -
Fig. 3b
Crimp Splice