Technical information

?
RADTO
RETAtLtNG'S
",
PHTLCO
39-307
Oscillation
as
volunre
control
is
ad-
vanced
replace
.0002-5
nrfd
plate
bvpass
on
75
first
audio
with
.0l
tnfd.
PHTLCO
39-3 |
Extrenrely
high
pitchetl
tone
with
tone
control
set
at
"high"
.
.
reverse
line
plug.
If
condition
still
persists,
change
position
of wires
around
vol-
ume control
leads
and
srid
lead
to
75.
PHTLCO
39-3s
If
pushbuttons
will not
stay in
re-
move
chassis
and
take
out the
two
small blocks
at
the front
inside.
This
permits
the
chassis
to
so
I
inch
further
forward.
PHTLCO
39-36
$et
plays
but
builds
up
to a
bad
hunr
at
tinres.
Check
orinrarv of
porver
transfornrer
for
le;rk
to
gr.rrrrr,l.
PHTLCO
39-40XX
Works
on
push
butrorr,
dead
on
manual
tuning
check
oscillator
tuning
gang
for
short
in
trimmer.
PHILCO 39-
|
r6
Weak
on autonratic
turring
(nrystery
control)
clean
contacts
on rotarv
arnr of tlre
stepper relay with
carbon
tet.
PHILCO
4lDC,
Pronounced
nasal
gglllty and
choppy
reception.
Replace
500,000-ohm
first
audio
stage
:grid
coupling
resistor
with 100,000-o-hms
-and
insert
a 3,0@
currentJimiting
resistor
in
serics
with
the
primary
winling
of the
push-pull
input
transformer.
PHTLCO
,f5
Weak
check
cathode resistor
of.
647 f.or increase
in resistance.
Replace with
j-watt
500
ohnr unit.
P_HILCO
45.
No
ptate
voltage
on
75
tube
. . . Bad
.l
mfd.
plate
con-
denser,
part
No.
30-4170.
When re-
placing
uie
a higher
voltagc
unit.
In-
termittent
reception,
cspecialty
when
tuning
. , . Bolts
that
hold
tuning
con-
denser
to
the chassis
may
be
too long
or too
tight,
shorting
to the
stator
sec-
tion.
This
is a hard
one
to find if
you
don't know
about
it. Loosen
boltJ
or
cut
oft
ends to
correct.
PHILCO
,+5.
Continual
failure
of
type 80
Replace
filter No. 30-2028
with
new
part
No.
30-2079.
PHILCO
,15
Low
volume
during
PHILCO
{6 D.C.
Replacing
type 14
and
l7
tubes
with
otheis
moie
-iasily
obtainable
. . . Include
75
ohm.
l-0
watt
resistor
in series
with
speaker
field
and
use
39's
in
the
r.f.
stagel,
36
in the
detector,
37
in
the
audio.
-
PHTLCO
47
Intermittent
reception,
frcquent
burn-
out
of
tubes
and
pilots
.
. check pilot
light
socket
behind
the
tunins
meter
for
short
to chassis.
PHTLCo
4t
Irrtermittent
reception,
frequent
burn-
out
of tubes
and
pilot
lights
short
between
chassis
and pilot
light
bracket
hehind
shadow
tuning
meter.
PHILCO
50, 50A.
Set becdmes
noisy
and
goes
into
oscillation
at low
frequency
end
of band
, Ground the
sDeaker.
PHTLCO
5{
.
If
vern_ier
dial
slips
when,tunirrg,
oil
the
bearings
of
the
gang
condenser
before
tinkering
with
the
dial mechan-
PHILCO
54.
Hum..
.
Etiminate
grounds
to
chassis,
generally
at
network
of
a.v.c.
resistors
or
grid
lead
of 75
tube.
PHTLCO
s4
Weak
replace
open
12
mfd.
electrolytic
filter
condenser.
Dead
.
check
C 3l
a .00011
mfd.
unit
from
plate
to cathode
of 75.
PHTLCO
54
Distortion
and
rapid
nrotorboatini
when
strong
signal
is tuned
in
.
. . ,"
place
72 mfcl
filter
condenser.
This
con
denser
u'ill
usuallv
test
okeh
but
ivil
open
rvith
a
signal.
PHILCO
5,t
-Fading,
motorboating,
dead
on
part
g!^qgl
.
.-._replace
coupling
condenser,
51000
and
5000
ohm
resistor
of
oscil-
Iator
circuit.
?H|LCO
tl
Unstable volume
,
.
.
replace
dual con-
denser
No.
54
located
behind
43 tube.
Heat
from
tube damages
this
condenser.
PHTLCO
54
Intermittent
check
oscillator
coil
terrninals for
loose
connections.
PHILCO
MODEL
54
Poor
tone
and
sensitivity-bad
elec-
trolytic, part
No. 15.
A
whistle
in
this
model can
be stopped
by rearrang-
ing
the i.f. plate
and
grid
leads.
PHILCO
5,1,
E0,
El, E4.
Weak
.
.
.
First look
for
poor
77,
then for
open
i.f.
pickup
coil.
The
one that
is
-
bank-
wound
is
most
deceptive
as
the
set
bal-
ences
without it.
(LF.
460
kc.)
PHTLCO
57
Dial
drive
slips
rclease
en<l
bearing
on
gang
condenser.
If
dial
still
slips, rentove
drive
mechanistu,
take
apart,
and in'ert
thin
shim
dn-
der
tip
of
drive
shaft.
Reassenrblc
and
oil thorouglrll'.
PHTLCO
57
Noisy
tuning
look
for
wax
between
variable
condenser
plates.
This
is
caused
by
the
power
trans-
former
mounted
directly
above
con-.
denser.
PHITCO
MODEL
57
No
signal-bad
resistor
No.
2l
.
Urrless
the voltages
on
the 77
detector
tube are
correct
this set
will not
work.
PHILCO
57C.
Intermittent
oi
no re-
ception
.
See if white
lead
on
coil is
shorted
to
chassis.
It
passes
over
metal
bracket
holding
coil
in
place.
Re-run
it
under
the coil
brackct
if fraved.
PHTLCO
59
Oscillation
after
nornral
warm-uo
period
connect.l
mfd
bypass
from.g'reen
ternrinal
of
filter
bloci<
to
cnassls.
PHTLCO
59
Erratic,
intermittent,
squeals
.
re.
place
.09 nrfd
screen
bypasses.
If
this
does
not
eliminate
trouble
check
.015
mfd
bypass
fronr
high
voltage
centertal
s'inding
of
transformcr
to
ground.
PHTLCO
59
Can't
tune
in
stationsi
cuts
out when
jarred
tighten
oscillator
and
i.f.
shield
cans nuts.
Make
sure
therc
is
a lock
rvasher
under
cach nut.
PHILCO
59.
Fading
Replace
second
detector
77.
Atso
checi
i.f.
transformers,
.PlillCO
59C, 595.
Low volume, no reception on low
frequencies
.
. . Take
out
antenna and
oscillator coils and resolder all con-
nections,
tighten all
screws on
tuning
condensers. Replace 6,000 ohm rcsistor
and
1,400 mmfd
condenser.
Align.
PHTLCO
60
_^Dead,
full
voltage
at rectifier,
only
50
volts
at
set
side
of
speaker
.
.
-.
look
for
poor
insulation
on
primary
white
lead
of
second i.f.
where
it
crosses
bracket.
PHILCO
60
-
Motorboating
cut
green
lead
from
bypass
can
to trimmer
condenser.
Connect
0.1
mfd.600
volt
condenser
from
trimmer
to
ground.
PHIICO
60
Interntittent
hum
.
suspect paper
.25
mfd
condenser
from
the-last-fiiter
to
ground,
housed
in
metal
condenser
pack.
replace
warmup,
then
wave
trap.
_
weak
or no reception
all
norrnal
check
first
increases
.
.
PHILCO
451
Noisy with
plate
voltages
i.f.
transformer
for open.
PHILCO 45, f{5.
Distortion
or no
signals, trouble not
due to
tubes
Replace
bypass number
30-4170M
with
,05. 600 volt.
4l