Heathkit SB-401 - Page 8

HEATHEIT']
Page
89
TEST POINT
RESISTANCE
NOTES
Terminal strip AB
Lug
1
At
least
10
KQ
after
10
seconds,
Lug
2
0
Q
(ground),
Lug
3
Infinity,
Lug
4
02
-
with
MODE
switch
in
CW
or
TUNE,
(Diode)
At
least
15
KQ
-
with
MODE
switch
in
LSB
or
USB,
————
(
)
Turn
the
FUNCTION
switch
to
OFF,
(
)
Plug
the
line
cord
into
a
120
VAC.
wall
outlet
(or
240
VAC
if
you
wired
the
Trans-
{
)
Connect
the
green
power
transformer
lead
mitter
for
this
voltage),
to
lug
3
of
terminal
strip
J
(S-2).
See
Figure
1-1,
-_ —~
Turn
the
FUNCTION
switch
to
STBY,
—
—
Refer
to
Figure
1-1
and
install
the
3395.4
kHz
CW
crystal
in
socket
Y10,
The
crystal
frequency
is
stamped
on
the
crystal,
(
~—
A
VTVM
reading
of
approximately
-170
V
DC
should
be
present
between
pins
5
Install
all
tubes
in
their
respective
sockets,
of
tube
sockets
V10
and
V11
andthe
chassis,
except
driver
tube
V9
(6CL6),
and
replace
the
pilot
lamp
in
socket
TW.
—
~~
~-_~ ~
Turn
the
FUNCTION
switch
to
OFF,
(
)}
Install
the
4
ampere
slow-blow
fuse
in
the
fuseholder,
(Use
a
2
ampere
fuse
if
you
(_
)
Unplug
the
Transmitter
line
cord
and
install
wired
the
Transmitter
for
240
VAC
opera-
small
tube
shields
on
tubes
V3,
V4,
andV5,
tion,
NOTE:
The
2
ampere
fuse
is
not
fur-
nished
with
the
kit,)
~—
-_~ ~
Install
a
medium
tube
shield
on
tube
V1,
~~
Attach
the
line
cord
to
the
120
VAC
INPUT
(
connector,
~~
Install
a
large
tube
shield
on
tube
V8,
|
CAUTION:
This
Transmitter
has
operating
vol-
tages
up
to
800
volts;
it
is
very
important
that
(
Reconnect
the
line
cord
tothe
120
V
AC
out-
jmuch
care
be
taken
when
the
Transmitter
is
let,
then
turn
the
FUNCTION
switch
to
STBY,
jturned
"on",
These
voltages
can
be
fatal,
—
NOTE:
The
Transmitter
will
be
turned
on
for
(_
)
Turn
the
METER
switch
to
HV,
The
meter
{the
first
time
in
the
next
step,
Check
visually
to
should
read
800
V,
jsee
that
all
tubes
and
pilot
lamps
light,
If
there
jis
any
overheating
of
components,
unplug
the
jTransmitter
line
cord
and
refer
to
the
In
Case
(
)
Turn
the
METER
switch
to
PLATE,
The
jOf
Difficulty
section
of
the
Manual
on
Page
117,
meter
should
read
"0,"
—