swAN MODEL 4068
Model406BFrequency
phone
full
meters, and one 500 kc
band.
operation, and
incorporated.
been
CIRCUIT
the 2N706
Ql,
base
Figure
effectively tap the oscillator
percent
tional stability.
for
matchirtg
the
transceiver.
switch selects the appropriate coil and trimmer
range.
each
and trimmer.
trimmers,
200-kc segment
any
amateur
mbter band.
10
INSTALLATION
A universal
supplied with the Model 4068.
are
may
depending on
the car.
overhang.
bracket
lation
provided
mounting
bracket
bottom
tional
move
holes
add these
ALIGNMENT
Alignment
band coverage of
The
unit
provisions
THEORY
configuration,
6. Capacitors C1801, C2001,
of the tank cirorit. This results in excep-
the impedance of the coaxial cable to
as well as
Dial tracking
With
Model 4068
the
bands,
mounting bracket
be either
to the
on
will also
mounting,
holes along
the cabinet
already
top mounted, or bottom mounted,
where the 4O68 is to be mounted in
Many
In other cases, attaching
bottom
a top surface. A row
the sides of the 4068
along
the bracket. You will find
of
provided
holes to the
same
the Model 4068
of
Control Unit
segment of the lGmeter
is specifically intended for mobile
for
mobile mounting
Oscillator operates
as a
Colpitts
across
the Emitter
Q2,
for
is
adjusted
proper
and any 500
of the newer
allow
it will
the
first,
adjustment
may
in the 8G through l5-meter
the 4068 will allow instal-
of
tilting of the 4068. For
necessary
be
bottom of the cabinet.
you
and
for
this
cabinet.
is designed for
80, 40, 20 and 15
in
the common
oscillator.
and
C2003
only about 10
Follower, is used
isolation. The band-
with the core
coils and
of
used to cover
be
kc segment of the
and
mounting screws
This
bracket
mounting
the
drill addi-
to
find
only the
padded
for
that the
chassis
Simply
have a
cars
small holes
of
cabinet
will
purpose.
requires
FREQUENCY
of a
ranges
the receiver is not
in the
have
See
for
the
selection
FOR
which may
simply remove
adjust the trimmer
range.
FOR
T\rne
quency
coverage. receiver
lowing
within a few
on calibrator
with calibrator
tuning to high
mer
end adjustments
ends.
the unit.
406B
FREQ
RANGE
are
top
Re
14.15-14.35
2r.25-2r.45
28.5-29.O
use
CONTROL
general
receiver
MINOR FREQUENCY ADJUSTMENTS,
MA.'OR FREQUENCY ADJUSTMENTS
Frequency
capacitor for zero
coverage receiver
between 8 mc
transceiver is used for final adjustment
must be accurate within
of the
be
range,
table.
Adjust
kc of the receiver frequency, then
and
Coil
3.8-4.0
UNrT
funing the frequency
24
and
critical since the
proper
required after
and adjust vernier coil for zero
end of tuning range and
100 kc harmonic.
the cabinet cover and
capacitor
Control Unit to low end
and locate heterodyne
at frequency indicated in
vernier coil to
100
at
kc
beat. Repeat high and
until calibration is correct
capacitor
OSC.
FREQ.
(kc)
Low-High
mc.
crystal calibrator
50
the initial aging
marked
bring
increment
locations
of
are marked ln
ADIUST
COIL
(Low
end)
Calibration of
kc
very carefully
for the
with
heterodyne
dial.
adjust
L1801
8973-9r73
7.L-7.3
12,273-r2.473
L1802 c1810
16,077-16,277 L1803
23,327-23.827 L1804
but
permit
to
period,
specific
fre
of
general
the fol-
switch
beat
Move
trim-
low
at both
ADJUST
CAP.
(Hi
end)
c1804
cr813
cr807
26
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