Hy-Gain TH3-MK3 Thunderbird - Boom-to-Mast Bracket Attachment

Select
the
cast aluminum
boom-to-mast bracket
(item
1). Align the holes in the boom-to-
mast
bracket
with the holes
in
the
boom-to-bracket
clamp.
Us:e the
s/
'a"-18
x
5"
screws
and the
s/ro"
nuts
and split
lockwashers
to
join
the bracket and
the clamp.
See
Figures
4
and 5. Do not
tighten
the
screws at this time.
The
bracket
must
be
loose
to enable
you
to
mount
the
antenna
to the
mast.
BOOM.TO.MAST
BRACKET
AO-0388-B-014
Figure 4
NOTE: The
boom-to-mast brackets have
a
hole
thrcugh
their
centers to allow securing
to the mast with the
5
/ rc"-18
x31/2" bolt. lt is recommended
that the mast
be
removed and
an11
/32"
hole
be drilled at the desired mast
clamp
position,
then reinstallthe mast.
lf
this
is
not
possible,
the
clamp
will
hold
its
position
on the mast in all
but the
most severe
weather
conditions.
t^-@o.c-o2t
tr-18 r 5' 8oLT. LocKwasHEn ail
tur
(tr9tcot
4
Dtocaa )
casT
Alutttlx
ARACKETS
-a-6
?6-18r2t'
rcLr,
LocKwAsrER o.d
NUT
BOOX-TO'SRACXET CLAIP
$.-rBr!h'!olt,
LOCIWASXER od XUT
(O9lloml
d 16.
tro&cta,
1.-[r
3Yt' 3o!T,
-
locxwlsaEn.nd NUT
(
Irplcol 2
ploc..
t
-@-o,li
Figure
5
-3-
--H
L-
k-zo'1,'eorr.
LocKw sHER od rur
(
ltplccl
4
,locat
)
CASTING
-TO.8OOT
CLAilP
IAST
(Suppli.d
!r
curroil..l