Alignment Chart - Heathkit SW-717 Assembly

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( )
Set
your VTVM to
read ac
volts on its
lowest
scale.
4.
Then connect
the VTVM
leads
to
the
loudspeaker
terminals.
Connect
the
probe of
the VTVM to
the
white wire and the
common (ground) lead
of
the
VTVM to
the black wire.
( )
Turn on the
signal generator and
the VTVM.
Then
allow
5
minutes
to
elapse
before
you
start
the
alignment
steps.
Align
the
Receiver
by
performing
the
steps
in
the
"Alignment
With
Instruments
Chart." The
following
numbered
paragraphs
explain the
first
step
in the
chart and
will
serve as
an
example
of
how to
perform the other
steps:
1.
Set
the
Receiver BAND SWITCH
at
D.
Set
the signal generator
at
11 MHz. Adjust
it to
the
minimum
useable
signal level.
Be sure
to turn
on the
modulation of the
signal
generator.
Set
the
MAI N
TUNING of the
Receiver so
the pointer
is
at
11 MHz.
ALIGNMENT CHART
Refer
to
Figure
2
and
identify L4 and
L7. Then
use
the alignment
tool
and
adjust
L4
for
the loudest
signal
(highest VTVM
reading).
lf
you do not
hear
the
signal
generator
at the
first
setting, tune
the
Receiver
to
each
side
of
the 11
MHz setting and
find
the
generator
signal. Then
turn
the
coil
core
in the direction
which
will
move
the
signal
to the
11
MHz position
on the
tuning
scale.
Adjust
L7 for
maximum signal as heard
on
the
loudspeaker
and
seen
on the VTVM
scale.
Note that
small
changes
in
signal strength
are more
easily
detected
by the
meter
than by
your
ear.
Perform each step
in the chart carefully.
Repeat
the
steps
as necessary.
Then
disconnect
and
shut
off
the
VTVM
and
the signal generator.
5.
2.
o.
7. 3.
BAND
SWITCH
SIGNAL
GENERATOR
MAIN
TUNING
lNDICATOR ADJUST
()
D
11 MHz
ilMHz
L4,
L7
()
D
26 MHz 26 MHz
c35,
C39
()
c
4.5
MHz
4.5
MHz
L3, L6
()
c
9.5 MHz 9.5 MHz
c34,
C37
()
B
1.6 MHz
1.6 MHz
L2,
L5
()
B
3.6
MHz
3.6
MHz
c33.
C36
()
A 600 kHz 600 kHz
L1
{)
A
1400
kHz 1400
kHz
c32