Heathkit W-5M User Manual

If
some
shortage is
found
in
checking the
parts,
please
notify
us
promptly
and
return the
inspec-
tion slip
with your
letter
to us.
Hardware
items
are
counted by
weight. An
occasional
shortage
occurs
and
if this
is true
in your
kit,
please
obtain
the
missing
parts
locally
if at
all
possible.
Resistors
and
controls
generally have
a
tolerance rating
of
±20%
unless
otherwise
stated
in the
parts
list.
Therefore, a
100
KO
resistor may
test
anywhere
from 80
K£2
to 120
KO
and
still be
acceptable.
Tolerances
on
electrolytic
condensers
may
be
even
wider
and
commonly
run
from
+100%
tb
-50%. The
parts
furnished with
your
Heathkit
have
been
specified so as
to
meet
the
performance
specifications
given.
In
order to
expedite
delivery
to you, we
are
occasionally
forced
to
make
minor
substitutions
of
parts.
Such
substitutions
are
very
carefully
checked
before they
are
approved and
the
parts
supplied
will work
satisfactorily
in your
kit.
For
example,
if
your
kit is
short a 15Kfi
resistor
and
an
18 Kfi
resistor is
furnished
which is
not
on the
parts
list,
you
will
understand
that
such
a
substitution
has
been
made. This
fact
is
mentioned
here only to
prevent
any
confusion
in check-
ing the
contents
of
your kit.
CAUTION:
We
strongly
urge
that you
follow
the
wiring
and parts
layout
shown
in this
manual
.
The
position
of
leads
and
parts is
quite
critical
in the
instrument and
changes
may
seriously
affect
the
characteristics
of the
circuit.
We
do
not
represent
that the
circuit
or
layout
of
the
instrument
cannot
be
improved;
however
the
methods
shown
in this
manual
are
the
result
of many
experimental
models
and
unless the
constructor
has
access
to
full laboratory
facilities, we
rec-
ommend
that they be
followed
very
closely.
STEP-BY-STEP
ASSEMBLY
INSTRUCTIONS
In
assembling
the
kit, use
lockwashers
under
all
nuts,
unless
otherwise
specified.
Tube
sockets
are
mounted
inside the
chassis
except
for
miniature
9-pin
shielded
sockets,
which
are
mounted
on top.
The
insulated
filter
condenser
mounting
wafers
are
mounted
on
top of
the
chassis.
Other
details
of
construction are
included
where
pertinent
in the
instructions.
"
(
)
Place
the
chassis
with the
open
side up
in
front
of
you
on
your
workbench.
Be
sure
that
the
apron with
the
holes
in
it
is
nearest
you. See
Figure
8
on
Page
13.
'1'*
)
Mount
a
9-pin
miniature tube
socket
at
location VI,
using
3-48
hardware
with
lockwashers.
Use
the
chart
on Page 32
to
identify
hardware
sizes
if
necessary.
The
body
of the
socket
should be
outside
the
chassis,
with the
lugs
extending
up
through the
socket
hole.
Orient
the
socket
so the
blank
space is
positioned as
shown
in
Figure 8.
)
In
the same
fashion,
mount
9-pin
miniature
socket
at
V2.
NOTE:
In
the
following
steps,
do
NOT
use
the
6-32
x
1/2"
screws
until
called
for.
Install an
octal
socket
at
V3,
using
6-32 hardware.
Be
sure
that
a
1-lug
terminal strip is
mounted
on one
screw as
shown in
Figure
8.
Position
the keyway of this
socket
to the
left
as
shown.
( )
Similarly,
install
octal
socket
V4
and
terminal
strip
F,
with keyway
oriented
in
the
same
position.
)
Mount
octal
socket
V5.
Note
that
the
keyway
for
this
socket is
to
the right.
No
terminal
strips
are used
on this
socket.
( )
Outside
the
chassis,
install
insulated
condenser
mounting wafer at
G,
using
6-32 hardware.
Be
sure
that
the
wafer
is
mounted
outside
the chassis.
)
In
the same
manner,
mount
a
second
insulated
condenser
mounting
wafer
at
location H.
This
wafer
also
mounts
outside
the
chassis.
%«-
)
Insert
a
3/8"
rubber
grommet
in
the
chassis
hole
at
R.
f )
Insert
a
3/8" rubber
grommet
in
the
front
apron of the chassis
at
FF.
(
)
Insert
3/4"
rubber
grommets
at
locations
S
and
T.
(
)
Mount a
2-lug
terminal
strip
A
and
three
dual-lug
terminal
strip
B,
using
the
hole
to
the
left
of socket VI.
Use
6-32
hardware.
( )
Mount
three
dual-lug
terminal
strip
C,
between
sockets VI
and
V2,
using
6-32
hardware.
( )
Mount
4-lug
terminal
strip
X
directly
below
terminal
strip
C.
Use
6-32
hardware.
Page
12

Heathkit W-5M Specifications

General

Brand	Heathkit
Model	W-5M
Category	Amplifier
Language	English