Hy-Gain LP-1009A, Instruction Manual

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Feedline Assembly
Select the eight (8) 3/4" feedline tubes, six (6)
7/8" x 2" splice tubes, pigtail wire assemblies,
support clamps, insulators and hardware as
shown in Figure 9, 10, 11. The rear end of each
feedline tube is identified with a label. This label
also indicates which element is connected at that
point. Assemble the feedline tubes and splice
tubes together as shown, using #10-24 x 1 1/4"
screws, #10 internal tooth lockwashers, #10 split
lockwashers and #1024 hex nuts. Slide the 5/16"
diameter spacer tubes into the open ends of the
feedline tubes when installing pigtail wire
assemblies for elements #1 and #12. These will
prevent the screws from crushing the tubing at
these points. Install the pigtail wire assemblies
on the tubes as shown. Before tightening the
hardware, position the pigtail wires as shown.
NOTE: The pigtail wires must alternate from
crossed to not-crossed, starting at the rear of the
phasing tube assembly and progressing toward
the front. This is the normal configuration of a
Log-Periodic Dipole Array (LPDA). Make sure
you follow the pigtail configurations of Figures
9 through 12.
Figure 7
Element Tube Descriptions