Technical information

@
RADIO
RETAILING'S
",
q'de
VICTOR
32.
Open
speaker
fields are
often
easily repairable.
Remove
cover
and
look
for
burned
or
broken wire.
Usually
these
are accessible.
vtctoR
R32
Noisy
volume
control
when
re-
placing
controls
in
this set
use a 10,000
ohm
unit. Disconnect
the
brown
resist-
or
that biases
the 26
r.f.
tubes and
con-
nect to
one side
of new
control.
Con-
nect
antenna to
other side,
ground
cen-
ter
arnt. This
change
*'ill increase
selectivitv
ancl
give
the
control
longer
life.
RCA-VICTOR
R32.
Neutralizing
adjustments
.
.
Some
of these sets
do
not have
holes
in
the
top of the
chassis
to
permit
entry
of insulated
screwdriver.
Sets
frequently
neutralize
perfectly
without
plate
but oscillate
all over the
place
when
it is replaced,
especially
when new
tubes
have
been instalted.
Most
trouble is
at high-frequency
end
of
dial.
Grasp the rear
26 nearest
the 27
detector
while
the metal
olace
is off
and
oscillation
will occur.
Neutralize
while
holding this
tube,
carefully adjusting
the
neutralizing
screw
nearest
detector,
and
the
set
will operate
ok when
the
plate
is
put
in
place.
VICTOR
RE 32,
45. Background
noise,
lack
of sensitivity . Replace
27
detector
with
a 56.
VICTOR R32,
RE45,
57. To
repair
cones
take
an old
one and cut out
a
piece
lrt
round.
Take
a
piece
of
old
panel
and
cut out
two
pieces
the same
size,
drilling
a
rt
hole. through the
center
of
both. Coat the
cone with
glue.
Now
take
the two
panel pieces
and
put
over the
cone with
the
piecc
of
old cone.
Put
a
rt
bolt through the
center
holes,
tighten
and tet dry.
RCA
R32,
RE45,
RE52.
Low
vol-
ume,
all
plate
voltages
ok
.
Check
for
Lrose
connection
on
power
plug
into
pack
frorrr
chassis.
Spring
contacts
on
frnrale
.sectiorr
frequently
corrode
suffi-
cietly
to reduce
heater
supply
values.
RCA
R32, R52,
RE,ts.
Intermittent
reception,
little
volume,
voltages
ok .
.
See if
cone has
become
toln
around
fibre
washer
at center.
It
will
be neces-
sary
to remove
the
speaker
to
discover
such
a break.
RCA
R32,
R52,
RE45,
RE75.
Whistle
in
baclground
on all
stations,
reception
otherwlse
ok
Generally
due to
open
500,000
ohm resistor
acrosi
half
second
ary winding
of interstage push-putl
audio
transtormer.
RCA VTCTOR
34
Vibrator
noise
or.er
entire
tunirrg
range
after new
r-ibrator
is
installed.
.
Unsolder
secondarv
leads
to vi-
brator
points
and
ts'ist
together
before
resoldering.
RCA M34
Noisy
, .
.
Check volume
control
cable
shield
at chassis
for poor ground
con-
nection, It
frequently
loosens
or breaks
off
near
base
of
vibrator.
RCA M
34 Vibration
loosens mounting.
Secure two
pieces
of
rubber
or
felt
about
l
inch
thick. Place
these
behind set
on
bolt,
one
each side
of bulkhead,
com-
pressing
tightly
with nut.
On Chrevro-
lets
and
other cars having
light
bulk-
heads
which
permit
shimmying
of
chassis
place
6 by
8
inch
steel
plate
untlpn
.,nraller
one
furnished
by manu-
facturer,
holding
it in
place
with
8/32
bolts
passed
through holes
drilled in
four
corners.
4C4
M3_4,
cE
840.
Speaker
rattle
or
sizzle.
Try
centering
tone.
Re-"".
trom
case
and
look
for
filings
at
pole
pieces..
If
there
is
no
hole
i;;r;;n-f;;
centerrng
punch
one
g
before
re_instalt_
rng
as
drawtng
speaker
up
with
nuts
on
race
ot
chassts
may
twist
frame
and
tnrow
cone
off
center.
If
voice
coil
glue
loosens
don_'t
!.y
repair.
R.;E;;:
vrbrator
works
ok
but
set
is
dead.
place
papei
-scraps
between
all
contacts
and
check.from^each
high
side
to
grouna-;n
cnassls.
5horts
indicate
blown
con_
densers.
across
contacts.
If found,
re_
place
vibrator
base.
If
no
blown
'co"_
densers
check
for
one
between
B
;i;,
lead
on
speaker
(2nd
from
right
loo{ini
rnro
Dack
ot
set)
and
chassis
ground.
If
dead
short
is
found
trouble
lr""ruait"
in
intermediate
cans
shorting
-t;-;;li',
or
blown
4
mike
in
pack.
T-o
i;.;lat;
cjrn.s,.
Cluejaldboard
discs inside
covers.
Karue.
I lghten
eyelet
in
center
of
speaker
screen.
Unstable
vibrator
ooer_
ation.
Check
small
rivets
holding
arila_
tur€
to
channel
section
of
spriri
s and
tighten
by-pounding
if
toose,
..riluiJi
armature
for
job.
Field
current
anI
pilot
current
on
but
tubes
don't
light.
Poor
sold-ered
joint
between
small-r.f.
choke
L,Z
and
field
wire
lead.
RCA
M 34,
GE B40.
Set
starts
late,
91 -only,
after
racing
motor
. . .
Replace
6A7.
Cuts
out
permanently
after
jtart-
ing
up ok,
or no reception.
though
ser
sounds
alive
. . Resolder
connections
on
oscillator
coil farthest
from
antenna
lead,
being
careful
not
to
overheat or
short
lug
to frame.
Volume
ok
on
high-
frequency
end
but
poor
at low..
. . Re-
place
antenna
coil if
trimmers
seem ok.
No
sensitivity
on high
end
. . . if
trim-
mers
are
ok
check
.5
mfd.
condenser
across
cathodes
of
78
and
6A7.
which
also
causes
intermittent
noise
pickup
fionr.
vibrator
when
poorty
conrieciial
tlowt
on
strong
carriers
similar
to
microphonic
tube
.
. . If
replacing
6A7
cau_ses
no
change
replace
400,000
ohnr
vellow
resistor
on resistor
board
with
500,000
ohms
and
conhect
.0001
con-
denser
across
this
resistor
if
set lacks
punch.
Extreme
lack
of sensitivity
.
Itenlace
400,0-00
ohm
resistor
with 250,-
000
ohms.
Lack
of
audio
punch
.
.
Replace
60,000
ohm
resistor
lcross
a.f.
cransformer
secondary
with
100,000
ohnrs.
Pronounced
buzz from
vibrator
aud
no
signal
.
. .
See if
oscillator
tube
filanrent
pront
is
shortinq
on
diode
orono
of
687.
To
mount
set
on Model
A'Fort
rvhere
no
heater
is
used
mount
be-
tween
choke
rod
and
accelerator
rest
with.
speaker
facing
seat,
cutting
off ex-
tension gas
cutoff
lever.
This
ii
a tight
but
neat
fit.
Do
not
mount
this seiirr
any
but
vertical
position
as vibrator
unit
wi'll
bear
against
container
causing
unstable
operation
and
contact
sparking.
RCA
R34,
R35,
R39, R857.
90
pcr
cent
ol the
trouble
erperienced
with
thesc
re-
ceiaers
may
be
troced
to the
70,000
ohn
rcd
and
-green
resistor
in
the
plate
ci.rcuit
of the
frst
audb
stage, the
1L meg-.
red
and
white resistor
in the
detector
control
grid
cirntit and
tfu
lL
meg.
blue
and
grecn
resistor
located
under
the
resistance
board.
VICTOR
35.
Low
volume
or no recep-
tion.
Turn
on
set and
permit
tubes to
warm
up,
setting
dial
on strong
local.
Remove
detector
and
then leplace
quickly.
If
set
plays
for
few
secondi
and
then fades
out replace
detector
screen
reslstor.
RCA
R35
Intermittent
facling,
noisy.
Re-
l-nove
cotter
pins
on variable
condenser
shaft
and insert
washers
of the
correct
thickness
to
take up
play.
VICTOR
R35.
Weak receDtion.
Commonly
either
open
detector screen
resistor
or first
a.f,
olate resistor. The
first
is
located
undei
resistor
board on
chassis.
To replace
connect
pigtail
unit
of.
ll
megohms
to
two inside-lugs
on
side
of
board
toward
the cent;r of
chassis.
To replace
a.f.
unit
loosen
pack
Dut
do
not
remove
and
tlp
up
bottom
sufficiently
to
clip
out
grien-
and red
prgtau
resrstor
on terminal
strip, replac_
ing
with
70,000
ohms.
RCA
R35
Internrittent
fading,
noisy.
Re-
rlrove
cotter pins
on
variable
condenser
shaft
and
insert
washers
of
the
correct
thickness
to
take
up play.
VICTOR
R35.
Weak, distorted
recep-
tion.
Examine
resistdr
R14
mounted on
filter-capacitor
block
between
terminats
6 and,7.
Correct
value
is 70,000
ohms.
RCA R37.
Gradual
loss
of volume
.
Control
grid
lead
to 287
is
rubber-
covered
wire, shielded.
It
passes
close
to
bteeder resistors
and
heat
some-
times
melts
rubber,
permitting
short
to
shield.
Rewire
with
cotton
insulated
wire.
(I.F.
175
kc.)
RCA
R-37,
R-38
(GE
K_60,
K_6s)
Componenti
subject
to br.eakdon'n:
trvo
10,000
ohm
carbon
resistors,
one
connectecl
betrveen
B
plus
and
all
screens
except
that
of 2A5,
other
be-
tween
sallte
screens
and
chassis.
Use
l0
rvatt
replacenrents.
Electrolytic
corrrlellser
lrlock
also
soulce
of troulrle.
RADIOLA
+f AC.
Microphonic
howl
and low
audio
howl. May
be
caused by
open by-pass
condenser
across
secondary
of first
a.f. transformer.
RCA
,12,
48. Defective
volume con-
trol.
Check r.f. 24's
tor
plate
to screen
short
to avoid
repetition
of the
trouble.
Such
shorts
put
abnormal
current
through
the controls
but otherwise af-
fect
regeption
very
little.
RCA-VICTOR
44.
Fading on
locals . .
.
May
be due
to
corroded
center
friction
contact
of
volume control
arm.
49