ORDER NO.
533
INSTRUCTION
MANUAL
Assembly
Instructions
Boom-to-Mast
Bracket
Assembly
Element-to-Boom
Bracket
Assembly
Model CB-3
CH, 3-element beam
PN 805661
The Hy-Gain
Model
CB-3
is a 3-element.
beam des igned
to operate
over
the
entire
frequency
range
(26,9
to 27.3
mc).
lt develops
a forward
gain
of 8 dB,
has
a front-to-back
ratio
of 20 dB and front-to-side
ratio
of 40 dB.
Unpack
the
antenna
from
the
carton
and check
the
parts
against
the parts
Ii st. Use
the
drawings
to help
you
in identifying
the
parts.
Select
the
boom-to-mast
body
and the
boom-to-mast
clamp
and loosely
assemble
using
four
1/4"-20
x 3/4"
screws
in the
outside
holes
only.
The inside
holes
will
be used
later
for
the U-bolts.
Insert
the
boom tubes
(ends
not drilled)
into
boom-to-mast
clamp.
Holes
in tubes
must
be hori-
zontal.
Now,
tighten
the four
screws
in the boom-to-mast
bracket
securely.
See Figure
2.
Select
the
two
sets
of
small
element-to-boom
brackets
and mount
them
on
each
end of the boom
in the pre-drilled
holes
using
10-24
x 1-3/4"
screws,
nuts,
and lockwashers
as shown
in Figure
3.
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