SteppIR DB18 Yagi - Attach the Elements to the EHUs; Prepare CPVC Inner-Guide Tube & Diverter Cone

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CHAPTER SEVEN
SECTION 7.0
ATTACH THE ELEMENTS TO THE EHU’s
PREPARE THE CPVC INNER-GUIDE TUBE & DIVERTER CONE
The 40/30 loops on the DB18 Yagi use a plastic tube and a diverter cone located inside the telescoping pole,
to guide the copper strip out of the EHU. The plastic tube is off-white and is made of CPVC. There are 3
pieces that make up the guide tube assembly: The diverter cone (PN 10-1509-02), the 39-7/8” section of
3/4” CPVC with no coupler (PN 70-2025-23) and the 49” section of 3/4” CPVC with a coupler attached to one
end (PN 70-2025-13). This guide tube is only required for 40/30 loop elements. The guide tube is not
needed on the return side of the loop. Figure 7.01 shows the three pieces in the assembly.
The smaller diameter end of the diverter cone is glued to one end of the 39-7/8” CPVC tube as shown in fig-
ure 7.02 . Use the supplied glue and applicator as shown in figure 7.03. Apply the glue evenly around the
outside diameter of the tube as shown in figure 7.03. Be sure you get even coverage all the way around the
tube. Cover about 3/4” of an inch deep as shown in figure 7.03. Firmly push the 39-7/8” CPVC tube into
the diverter cone end as shown in figure 7.04. Let the glue dry at least 20 minutes before moving it.
Apply glue evenly around the outside diameter of the 39-7/8” CPVC tube as shown in figure 7.05. Apply ap-
proximately 3/4” deep as per prior step. Locate the 49” CPVC tube (PN 70-2025-13) with coupler, as
shown in figure 7.06. Push the 39-7/8” tube firmly into the coupler as shown in figure 7.07.
Repeat above instructions for remaining guide tube assembly’s (two per EHU, four total).
WARNING: Do not apply glue to the inner “female” portion of either the diverter cone or coupler. The glue
applied to the outside of the tube is sufficient to bond the two pieces, and will prevent potential for damag-
ing obstructions being formed by dried glue.
Diverter Cone
PN 10-1509-02
39-7/8” CPVC
PN 70-2025-23
49” CPVC
PN 70-2025-13
Apply glue ONLY on the
outside diameter of the
ends of the 39-7/8” pipe
NO
GLUE
NO
GLUE
NEVER use glue on the inside “female”
portion of the diverter cone or coupler
FIG. 7.01
FIG. 7.02
FIG. 7.04
FIG. 7.05
3/4”
FIG. 7.03
FIG. 7.06
FIG. 7.07