Alignment; Signal Meter Adjustment; Alignment With Instruments - Heathkit SW-717 Assembly

ALIGNMENT
Before
you start to
align
the
Receiver,
allow
it to
operate
for
approximately
5
minutes.
lf
any widence
of
overheating
is
observed
during
this time, turn the
Receiver
off
and refer
to
the
"ln
Case
of Difficulty"
section
of this
Manual.
For
best results,
the
Receiver
should be aligned
with
test
instruments.
A
VTVM
(vacuum tube voltmeter) and
a
modulated
rt
(radio frequency) signal generator
(that
operates
at
least
from
.5
to 30
MHz) are
required
for
this
procedure, described under "Alignment
With
Instruments"
following.
lf
these instruments are
not available,
perform the
steps
under
"Alignment Without
Instruments."
Refer
to
Figure 2
(fold-out from
Page
40)
for the location
of
the coils and trimmer capacitors used
in
the
alignment
instructions.
A
plastic
alignment
tool
is
provided
to
align
the coils. This
is
done
by inserting the
tip of
the
alignment
tool into the coil
core, and
then rotating the
tool for
the
desired
indication on
thE
VTVM.
SIGNAL METER ADJUSTMENT
{ )
Turn
the
Receiver on,
( )
Refer
to
Figure
2
and,
while
viewing
the
Receiver
from
the
front
panel, insert a small
screwdriver blade
(approximately
118"
wide) into
hole AW in the
rear
panel
and into the
R25
control
on
the
circuit
board.
( )
Turn the control fully
clockwise,
as
viewed
from
the
front
panel. The
signal
meter (lnset drawing
#2)
should deflect
to
the right.
This indicates
the
meter
circuit
is
working.
r{IDATHI<IT"
( )
Push
the connections on
the
black and
white twisted
pair onto the
two
loudspeaker
connecting
lugs.
( )
Tune
the
Receiver
to
a
point
where no signal
can
be
heard,
and adjust
the control in
a
counterclockwise
direction
until the meter needle rests over
the
left-hand dot and points to
0 on
the
meter scale.
NOTE: Protective
circuitry in the radio prevents damageto
the
meter
by
strong signals.
( )
Turn
the
Receiver
off.
ALIGNMENT WITH
INSTRUM ENTS
( )
Position
the
Receiver
right side
up.
The loudspeaker
should
be
connected.
( )
Preset
the
front
panel controls
as
follows:
VOLUME:Off
BAND:
D
BANDSPREAD:
O
MODE:
CW
BFO:
Off
( )
Be sure
the AN L switch
on the
rear panel
is
OFF.
( )
Connect
the line
cord
to
the electric outlet
and
turn
the VOLUME control
clockwise
to
the
3
o'clock
position. Adjust
this control
as desired
during the
alignment.
t )
Connect
the
signal
generator
leads
to
the terminal strip
on
the
rear
panel
of the
Receiver. Connect
the center
conductor
to
the ANT terminal and
the
shield
conductor
to the GND
terminal.
45