Technical information

O
RADIO
RETAI
tI
N
G'i_7',
RADIOLA
64
RADIOIA
80
.
Fading.
intenrrittent
reception,
sta_
tions
rece'ivetl
below
trr"i,
o.'ig.i;;f
s"i_
tlng'
connecting
tabs
on
oscillator
series
trinrnrer
condenser
h";;
snapped.
RADIOLA
66
Dead,
loud
hunr
shorted
bypass
corrdcnser.
across
1rl:Lte
an.l
cathode
iues
unucrneath
socket
of
second
detect6r
tube.
Replace
with
a
.OOZ+
niiO.
RADIOLA
66
. P"1d,
except
for
loucl
hurn
look
tor
shorted
.002
mfd.
bypass
fronr
plate
to
cathode
lugs
oI
i..o,,a
O*_
tector
socket.
RADIOLA
66
.
Dead,.
loud
hunr
look
for
1lorled
bypass
across
plare
,,,iJ-;";_
od€
ten)tina^l
^
of
seconcl
.
a.r..to.
;
"i._
ptace
with
.002_l
nrfo
unrt.
RADIOLA
67.
No
control
of
votum-e-
_.
Nearty
always
t,.l.i"!.
ij
3li13l9
"1,"1
end-sectiori
.ir.irili.
ail
vtoer,
tocat€d
in
tuning
chassis.
biffi'_
Tt:l:,
check
becau..
-pl".ins-'
oi';n
ormmeter
across
this
siction-wiii
nli
snow
rt
up
as
onc
side
is grouna;
;;;
the
other
is
onty
"U"ut-
+-.OOO-'-"f,*.-
above
ground.
Lhe
"
25-
*;,;-;.pj;.';:
ment.
RCA
R-73
.,^lud"r
aftcr.
fel.
nrinute,
i,i
opera_
uon.
check
ior.
operr ,ri
rlre
l0
mfd
cathode
b-vpass
on
the
5j
...ouj
detector.
RCA
7t
(GE
l2S).
Defective
detector
reactor
c-hoke
in
square
can
fastened
to
ctrassrs
side-.
. .
Replace
with
5,0ff
ohm
auoto
.transformer,
wiring primary
and
secondary
in
series
aiding.
Or
use
the
secondary
alone.
RCA
R.78
^ !:."0
hiss
,"vith
tone
control
in
hish
Posrtron.
Replace
10,000
ohnr
rie_
:i:1,".
(.1?5)
in
siries
"itrr
1c:sj-'.ooi
nlrd
con_denser
irr
plats
circrrit
of
46
outprrt
tubc.
RCA
80
.
Poor
tone
the
I
10,000
ohm
re_
sistor
connected
from
the
i.f.
pil
;
second
detector
cathode
has
decreasJ
in,
valuc
affectinr
the
bias
on
th;
lart;;
tuDe.
Keplace
$.ith
5
N.att
resistor.
RADIOLA
E0.
Noisy
reception
is
complaint-.
.
Examine
ii.
t;;;.r;;;J;
itrigtins.
l.st
detector
to
t.t
i:i.';i;;:.
j-l^r:_u.lit
has.
a
copper
rt,i.ta-'ii..
1?
:y::-n lrc
windings.
If
disconnecii"g
if,.
..Elrgt
grid
connection
of
the
i;?
l.f:
tuDe
does
not
eliminate
the
noisi
..pl"i.
the
^transformer.
Other
t."n.toriliiJ
sometrmes
cause
similar
u".i.ty
oi-noi.J
but
the
_one.mention.d
i,
th;-_;:;';;.:
quent
offender.
,,
No
control
of volunre
. .
.
Open
1g,000
onm
reststor
in
screen
grid
circuit
of lst
r.f..
Check
1d300
ohmlnd
110,000
olinr
resistors
in
same
circuit
before
i".t"fiir*
replacement
as
new
unit
will
t
;;;
;;1
again
if
these
have
dropped
nrateriailfi,,
value.
RADIOLA
80
-_Tl*rgl.
especially
.at
low
frequency
end
or
dlal
while
tuning
.
.
Rimove
flaked
cadmium
finisti
f.o",
;;;i;li;
i."1tT::n-uil'-lf
'ny"{lr"Jjf
:Xx;
.
RCA
80-t2.-
Loss
of
volunte
and
poor
tone.
Examinc
black
cnamelled
'bias
resistor.
for
45's,,
undcr
chassis,
i;.
;;J
soldered
joint.
RCA
80-82{6
,-_Cjltinual.rasping
of
speaker
.
. .
600
Kc.
trlmmer
loose
from
chlssis
,iUration
RCA
80,.
R50,
R55.
Static_like
noise
whe
n^volume.
control
i.
in
og
plsiiioi
.
r-rue
to
breakdown
oJ
inierstage
lilr:f?i3.. 1ld
p"v onry
show
up
after
i"^:.^l:"1_r.
Reptace.-int;rstase
;"i;;i
noused
rn
one
assemblv-
RCA
REtt
-
.Motorboati5
.
.
Clean
condenser
wrpers,.
install
.l
mfd.
condens.r,
b._
tween,
junction
of
Rl4
and
Rl5.
Con_
nect
lO
mfd.
50
volt
electrolyii.
irorn
gregn
lea{
on volume
control
,-o gr*"J.
Positive
foil
of
this
condense.
;;;;',;
ground.
RCA
857
.
Weak
,
.
check
for
5he1.1gd
1urn5
rn.arrtenna
coil.
.Ihis
is
rather
diffi-
cult
to
ch_eck
sirrce
the
total
resistance
rs
onty
u.5
ohnr.
RCA
857
.
Weak
..
check
for
shorted
turns
rn_antenrra
coil.
This
is
rather
diffi_
cult
to
check
since
tlie
total
,.rlrtun.e
is
only
0.5
ohnr.
RCA
857
,,P"lk,
plate
voltage
ltrrr..
.
.
Check
rJu
ohm
and
3J
olrnr
hias
,".lrtoi,
connected
in
series
rv,th
rectifier
ffii
tlve
and
ground.
RCA
YICTOR
96E,
96T,
96TI
.,.llotorboating
open
second
ntrer
co-ndenser
or
open
.I
nrfd
con_
oenser
trom
bottonr
of
antenna
coil
secondary
to ground.
RCA
96K5
,^Y1""
replacing
a_urlio
coupling
con_
oerrser.use
a
.00025
p"pe,
conIerrs.,.
ornerwlse
nrotorboating
and
oscillation
rvill
result,
RCA
VICTOR
967
.
Oscillation,
ntotorboating
.
open
J
mtd
bypass
fronr
screen-of
6F6..
RCA
96
T2,
96K
_ _
htermittent
reception.
Check
soctet
Brong.s
under
push
button
as_
sembly
for
short.
Arlionce
-Speed
PHOIUO.I[OTORS
??Euen-Speedrt
Mod.el
g0
A
Depend.able
Friction
Driue
Motor
at
a
Sensa-
tional
Price.
o,Eren-Speed
Model
B0
is
avail-
aD,re
lo^r
operation
on
ll0
or
220
vo|,
lU
or
60
cycle
source
at
16
wans
.
rnput.
Simple
and
quiet
in
oPeratlon-
l-
no
gears
-
smooth
posrtlve
friction
rim
drive.
Good
regulation-
eharacteristi",
fo.
uni
rormlty
o-f
table
speed.
Amplv
pro-
portroned
bearings_
la.g"-
oil'
re_
serves.
_Motor
and
idler
plate
shock
l,ounpd
to
mounring
pl"t"
foi
Io*
vtDratto_n
transfer
to
turntable
and
motor
board.
Forced
u".rtii"Uon-
ror
coot
operation.
Slip
type
fan
precludes
possibilitv
y"""1+;
pi;;'"#il,"i,t,
::'.13;
turntable
_
height
regardless
;i
mounting
board
thickness.
Avail_
able
with
8,
9,
or
l0
inch
tr.;t"bl"
top.
Maximum
depth
b"loru
;;;
mounting
plate,
2/16
inches.
Constant
Speed.
The-name',Even-Speed,,
means
con-
:.,:,T_1p*d,
under
all
normal
load,
Hrr",C:
and
^temperature
variations.
The
Model
80
.iiown'"br";-ir];;
one
of,several,
precision
luift
p,io-
nograph
motors
now
being
m"de
bv
Allia.nce.
Each
is
"
q";l'd;;;i
and
built
for
years
of
service.
For
more-rnt-ormation
on
Alliance
Even-
fleed
Phgno-Motors,
".k-;;;r-j;-
Der
or
write
direct.
o
Addrese
Departrnent
TT
AII.IAT{CE
}IrG.
GO.
rLfIANGD,
oHto
51