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Installation of 15-Meter Stub
Select a 7/16" x 60" piece of tubing and fasten
one end to one leg of the base tower section using
the clamps and shorting strap, as shown in Figure
8. Position the stub 67" (see Figure 16) from the
bottom edge of the tower leg to the bottom edge
of the 7/16" tube. Refer to Figure 8 for dimen-
sions and Figure 10 for installation of clamps and
shorting strap.
Assemble another leg clamp, insulator and splice
and install the second 7/16" x 60" section of
tubing onto the 15-meter stub as shown in Figure
8.
Install a leg clamp, insulator and tubing clamp
Select the
5/16"x 23"
into the
tuba. Adjust to either Phone (19")
7/16"
or
dimension as shown in Figure
CW (21-1/4")
Install a
compression clamp, line up the
½"
screw with the hole on the
securely.
NOTE: Typical VSWR curves are shown in Fig-
ure 16. The 10- and 15-meter stubs require two
settings to cover the bands with less than 2:1
VSWR. Use the VSWR curves to help you decide
which setting is best for your particular applica-
tion.
Place
5/16" caplug on the end of the 15-meter
stub.
section
tubing and slip it
of
tube and tighten
7/16
Installation of 10-Meter Stub
Select the remaining 7/16" x 60" piece of tubing
and fasten one end to one of the remaining tower
legs, as shown in Figure 9, using a set of leg
clamps and a ,shorting strap.
Position the bottom edge of the stub 160" (see
Figure 16) from the bottom edge of the lower
tower leg. Refer to Figure 9 for dimensions and
Figure 10' for installation of the clamps and
shorting strap.
Select the 7/16" x 38" section of tubing and
install as shown in Figures 9 and 10.
Install a leg clamp, insulator and tubing clamp
Select the
5/16" x 9-1/2
into the
tubing. Adjust for Phone (3") or
7/16"
8.
dimension as shown in Figure
(5")
Figure
16, VSWR
Install a
compression clamp, line up the screw
½"
with the hole on the
NOTE: The 10-and 15-meter stubs can be set
independently. One can be set for CW and one
for Phone, or they can both be adjusted for the
same mode. If you wish to adjust a stub for any
particular frequency within an band, this can be
done experimentally.
Place a 5/16"caplug on the end of the 10-meter
stub.
section
tubing and slip it
of
Charts.
tube and tighten
7/16
CW
Refer to
9.
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