Operation; Controls; Am Operation; Cw-Ssb Operation - Heathkit SW-717 Assembly

T:
OPERATION
Before attempting
to
use
the
Receiver,
carefully
read the
explanation
of
each
control.
Figure
4
(fold-out
from
Page
52)
illustrates
the front
panel
and
describes
the
control
functions.
Figure 5 illustrates the
rear
panel.
CONTROLS
VOLUME
-
Turns
the
Receiver
on or off
and controls the
sound
from the
speaker
or
headphones.
BFO
-
Required
for the
reception
of
CW
or
SSB
(single
sideband)
signals.
Turn the control
clockwise
until
the
signals are received
as
desired.
MODE - Selects AM, STBY. or
CW
(including
SSB) modes
of
reception. In the AM
position
the AVC
voltage
ison; in the
CW
position
the AVC
voltage
is
off.
In the STBY position
the
Receiver
is kept
warmed
up
and ready
for
instant
use
but
it
is
keot
muted.
BAND - Selects
one
of four
bands:
A,
B, C,
or
D.
-IEA.TIII<IT'B'
MAIN TUNING
-
Tunes
the
Receiver to the
desired
station.
BANDSPREAD
-
Provides
fine tuning
for
the
MAIN
TUNIIJG capacitor
to
help
separate
the
incoming
signals
from
each other when
they
are near
the
same
frequency.
This capacitor is
normally
left in
the
"0"
position
as
its
position
affects
the
main
dial calibration.
AM OPERATION
The
BFO
control
should be
in the fully
counterclockwise
position. Turn the
MODE switch
to
AM and
advance the
VOLUME control
for
sufficient volume. Set
the
BAND
switch
to
the
desired band and
tune in
a
station
with
the
MAIN TUNING
control.
Turn the BANDSPREAD control until
the
desired
station
is
clearest.
When listening
to
weak
stations,
slowly adjust
the
BFO
control for
the loudest and clearest reception.
CW-SSB
OPERATION
Turn
the
BFO
control 3/4 turn
clockwise.
Turn
the
MODE
switch
to
CW
and
set
the
BAND switch
to
one
of
the
shortwave bands, B, C,
or
D,
With the
MAI
N
TUNING control, tune
in
a
CW station.
Adjust
the
BFO
control
as follornrs:
Turn
the
control
fully
clockwise
and then slowly
counterclockwise
until
the
clearest
tone
is
produced. The
frequency
of this tone
may
be
varied either
with the MAIN
TUN
ING or
the
BANDSPREAD capacitor. Some experimentation
will
be
necessarv
to find
the
best
position
for the
BFO control.
53