10.
Disconnect the eight leads which connect the
TABLE
i-TUBE
SOCKET
VOLTAGES
R, P unIt to the main base. These leads are
Screen
Cathode
as follows:
Tube
Volt.
Volt.
(a)
Two
on the antenna
terminal board
(blue and black).
RCA-6SG7
(b)
One on number 7 pin
of
the 6K6GT
1st
R· P Amplifier
..
235'
l5'0
0)
output tube (brown).
RCA-6SG7
(c)
One
on
terminal E
of
the crystal load
2nd
R~
P Amplifier
2
235'
15'0
0
circuit (yellow).
RCA-6];
(d)
One on terminal E
of
the
first· I,P
Oscillator
........
3
110
0
RCA-6SA7
Transformer
(red).
1st
Detector
......
4
235'
50
2
(e)
One
on
terminal P
of
the
first
I·P
RCA-6SG7
Transformer (blue).
1st
I,P Amplifier
..
;
235'
150
.7
(f)
One
on pin 6
of
the
second
I·P
tube
RCA·6SG7
(green).
2nd
I·P Amplifier.
6
235
15"0
.
1.3
(g) One on pin 7
of
the second I· P tube
RCA·6SG7
(brown).
3rd I· P Amplifier.
7
235
l5'0
3.1
In addition, the by' pass
condenser which
RCA·6H6
grounds to the R·P unit near the second I·P
2nd Det. &
AVC.
8
tube must be disconnected.
RCA-6H6
Noise Limiter
.....
9
11.
Remove eleven screws which hold R,P unit
RCA6SJ7
to
main base. Three of these are on under side
1st
Audio Amplifie 10
83
34
0
of chassis along the front edge.
The
other
RCA,6K6GT
eight are removed from the top.
Power
Output
....
11
256
240
0
12.
The
R·P unit
may
now
be
removed from the
RCA,6j5
bottom
by
lifting up first
the
rear
of
the
R,P
B.F.O.
.............
;0
l2
40
0
unit and sliding it back out
of
the
opening.
RCA-VR'I;O
After
the unit has been repaired
it
may be
re'
Voltage Regulator.
13
15'0
0
assembled by following
the
above procedure
RCA-5'Y3GT
in reverse order.
Rectifier
•
.........
~ ~
«
14
300
X
PARTS
LIST
Symbol
Designations
Cl,
11, 33, 47,
51,
52,
64,
63,
74,83,117,
118,121,122
C2
CS,
6,
35, 40,
49,60,70,77
C4.5,
13, 14,
34,57
C7
C8
C9,10
C12
Cl&. 21
C16,19,22,
87,59
C17
C18
COO
C23,28
C2~
C25,
27, 32,
41,
43,
45,
64,
66,68
C2I6,
29,
42,
65.
67,
69
C30
CSl
C36,58
C38, 39,
60,
62, SO,81
DESCRIPTION
CAPACITORS
Capacitor, 4,700 mmfd.
..
Capacitor,
antenna
trim-
mer
..............
:
..
.
Capacitor, variable,
as-
sembly, 8 sections
....
.
Capacitor,
220
mmfd
...
.
Capacitor, 18
mmfd
.....
.
Capacitor,
SS
mmfd
.....
.
Capacitor,
22
mmfd
.....
.
Capacitor,
66
mmfd
.....
.
Capacitor,
15
mmfd
.....
.
Capacitor,
air
trimmer
..
Capacitor, 525 mmfd.
...
.
Capacitor,
13
mmfd.
....
.
Capacitor,
1,550 mmfd.
..
Capacitor. 3,000
mmfd
.. .
Capacitor,
2,700
mmfd
.. .
Capacitor,
air
trimmer
..
.
Capacitor,
82
mmfd
.....
Capacitor, 3,900 mmfd.
..
Capacitor, 82 mmfd.
...
.
Capacitor,
180 mmfd.
...
.
Capacitor, air
trimmer
..
.
RCADrawing
and
Part
No.
M-80079-531
M-2531S0-2
P-92444-501
K-90581-S41
K-9058l-315
K-90581-321
K-90581-317
K ·90581-9ZI
K-90681-213
M-95534-503
M-86079-508
K-90581-212
M-86079-533
P-721l33-9
P-721133-8
M-95534-501
K-90575-2'81
P-720638-4.6
K-90574-2S1
K-90581-239
M-95534-502
Symbol
Designations
C44, 46
C48,
lOO,
110,
103,106,107
C53
C53,76,93
C61,120
C71, 95, 102,
79,84,92
C76
CB6
C96, 97, 98
C99, 112, 113
CIOS
CllI,
116, 119
J1
*J2
Lt,
2
L3,4
L5,6
L7,8
L9,10
•
n""
..
t
....
·rs
with
~
.. ri:ll Xos. b ..
low
OO:lOOO
use
Phone
Jack-nwI!'.
K·98!l65.2.
14
DESCRIPTION
Capacitor. 91
mmfd
•.....
Capacitor, by-pass,
as-
sembly, S sections, 0.05
mfd. each
............
.
Capacitor,
6.8
mmfd
.....
.
Capacitor,
by-pass,
as-
sembly, S sections,
0.01
mfd.
each
...........
.
Capacitor,
15
mmfd
.....
.
Capacitor, by-pass,
as-
sembly, 8 sections,
0.1
mId. each
............
.
Capacitor,
crystal
phas-
ing
trimmer
.........
.
Capacitor,
BFO
Trimmer
Capacitor, filter pack,
as-
sembly, S sections, 4
mId. each
...........
..
Capacitor, by-pass,
as-
sembly, 3 sections, 0.25
mfd. each
............
.
Capacitor,
560
mmfd
•....
Capacitor,
2,700
mmfd.
...
CONNECTORS
Socket
................
.
Phone
Jack
............
..
INDUCTORS
Antenna
Coil,
No.
1
band
Antenna
Coil, No. 2
band
Antenna
Coil, No. 8
band
Antenna
Coil. No. 4
band
Antenna
Coil, No.
I)
band
RCADrawing
and
Part No.
K-90675-2SS
K-9S()M-l
K-90581-306
K-980.U-4
K-90581-3lS
K-980S4-2
M-2531S2-3
M-263132-l
P-70028-515
M -421395-509
K-98965-1
M-~
M-95521-50l:
M-95521-502
M-95521-503
M-95521~
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