Specifications
-
UI
n
FINAL
STEPS
You
have
now
completed
.the
assembly and wiring of your
amplifier.
When
you
have
completed
the
following steps your amp I
ifier
wi II be ready for use.
1) To
catch
any
wiring errors, it is suggested
that
the
entire
wiring be
checked
point-by-point
against
the
wiring instructions (and
preferably
also
against
the
schematic
wiring diagram in order to become more fami Iiar
with
the
component
layout and
circuitry)
.
While
doing so,
check
for rosin
joints,
loose lumps of
solder,
poor
lead
dress, and
accidental
shorts or
leakage
poths arising from the
flow
of
rosin
between
contacts
(remove wi th a
stiff
brush
dipped
in carbon
tet-
rachloride,
being
careful
not to spring
contacts
when
cleaning
switches).
2) Insert the
pilot
lamp in its
socket
and
tubes Vl through V6 in
their
sockets.
Be sure to insert
the
correct
tube
in
each
socket
.
Place
a shield
over
tube Vl .
See tube
layout
in instruction
section
(Fig. A).
3) If you
have
a VTVM or
YOM,
make the following resistance checks before
connecting
to the
o-c
line:
Check
for a
cold
d-c
resistance of
at
least
2 ohms
across the
c-c
line
plug;
check
for a
resistance
of
at
least
65 ohms
between
ground
and
pins 1
and
7 of XV6;
check
for a resistance of at
least
40KQ
be-
tween
pins3
&
90f
XV6 and ground. Allow
sufficient
time for
the
electrolytic
capacitors
to be
charged
by
the
ohmmeter
battery
in this
last
measurement.
These measurements
constitute
a
reasonable
check
of
the
power supply com-
ponents and wiring
before
applying
power. If you do not
obtain
the minimum
resistance
values
indicated,
do
not
procede
to the
next
step
until the
cause
is
discovered and
the
condition
remedied.
4.
( ) Fig.
7.
Assemble
the
left
and
right
side
pieces
to
the
chassis. Each
side
piece
is mounted
with
two
'8-32
X 3
/8
brown
colored
screws, two
'8-32
hex nuts , and two
'8
lockwashers.
5.
( ) Fig. 7 .
On
the
rear
edge
of
the
chassis
surface,
mount
the
two Ti
nner-
man
speed
nut
angle
brackets,
using a
'S
P. K. - Type Z screw for
each.
6.
( ) Fig.
7.
On
the
bottom
flange
of
each
side
piece,
press a Tinnerman
'S-32
- Type J
speed
nut
in
place
over
each
of the
three
holes.
7.
( ) Fig. 7 .
Mount
the
bottom
plate
on
the
bottom flanges of
the
side pi
eces,
using six
'8-32
X
3/8
uncolored screws.
Note
that
the
rear
flange on
the
bot-
tom
plate
fits
over
the
outside
of
the
rear
chassis apron .
8. ( ) Fig.
7.
Install the rubber
feet
in
the
openings provided in the bottom
plate.
The method is to work
the
rounded portion of
each
foot into the
interior
of the
cabinet
from the
outside,
using a small screwdriver. The
flat
portion
shou Id be
the
actual
resting or
contact
surface .
9. ( ) Fig. 7 . Insert
the
perforated
cover
into
the"
rai Is" on
the
side
pieces
and
slide
it forward
fully.
10. ( ) Fig . 7 . Mount the control
plate
on
the
bezel
(locating
the
hole
for
the
plastic
pilot
jewel in
the
lower
right-hand
corner
of
the
control
plate
over
the corresponding hole in
thebezel),
using two
each'4-40
X
1/4
brass
screws,
'4
lockwashers,
and'4
hex nuts to fasten it to
the
bezel.
Press the
plastic
pi lot
jewel
into
place
on
the
control
plate.
11.
( ) Fig.
7.
Fit the
bezel
and control
plate
over
the
projecting
control
shafts,
onto
the
ends of
the
side
pieces
and
the
perforated
cover.
Assemble
the
bezel
to the
side
pieces
with four
'6
X
1/4
brown
colored
P
.K.
screws . Be-
fore
tightening
the
screws
finally,
be sure
there
is
adequate
play
to
slide
the
perforated
cover
out.
12. ( ) Fig. 7 . Fasten the
perforated
cover
to
the
two Tinnerman
angle
brackets
(previously mounted on
the
rear
edge
of
the
chassis
surface),
using
two'8
P. K.
Type Z screws.
13.
( ) Fig.
7.
Set all controls to
the
furthest
counter-clockwise
position.
Mount
the
knobs on
the
shafts with
the
indicating
dots
pointing
as follows:
SELECTOR
knob
at
AUX; VOLUME knob
at
0;
BASS
knob
at
-5;
TREBLE
knob
at
OFF.
14) OPERATIONAL CHECKS
ON
COMPLETED KITS: In
the
INSTRUCTION
partof
thismanual
you will find a
section
titled
"Electrical
Installation.
Read
thiscarefullyandconnectyour
speaker,
phonograph,
and
tuner to
the
amplifier
in
accordance
with the instructions
given.
Then read the
section
titled
"Oper-
ating
Instructions" and
operate
all
the
controls,
checking
aurally
for
the
results
described.
If
the
amplifier
does
not
operate
at
all
or
operates
incorrectly,
use
the
TROUBLE-SHOOTING
chart
and
the
VOLTAGE & RESISTANCE
chart
to
discover
and
remedy the
difficulty.
As
the
Trouble Shooting
Chart
presumes a
properly wired
amplifier,
which
may
not
be
the
case,
recheck
the
wiring
for
errors or reversed
connections
and
continuity
.
15) If the
amplifier
is
tobe
mounted in a
console,
read
carefully
the
"Mechan-
icallnstallation"sectlonof
the instructions
andfollow
the
proceduresoutlined.
16)
Detailed
information as to
connection
of
phonograph,
tuner,
etc
.,
to the
amplifier
inputs
and
speaker
systems to the
amplifier
output,
as
well
as
a-c
I
ine
piug
connectIons
and
use of the hum adjustment
control,
is
given
in the
"Electrical
Installation"
section.