Operating instructions

I
I
6.
ldentificotion
Tobte of
Ports
for Rodio
Receiver
R-|74/URR-Continued
Ref
symbol
Name
of
part
and description
Function
of
part
Signal
Corps
stock
No.
c27,
c35,
c42,
C41
c36
c4,
c13,
c38,
c40
c46
C6
thru
C9'
C15
thrtt
c18,
c50
thru
C53
^ÀA
c1A,
B, C
D
N1
AGO 313A
C2
CAPACITOR,
fixed:
paper
dielectric;2000
ppf
-+201c;200
vdcw; JAN
type CN20A202L'
C48:
V5 screen
grid
a-f
bY-
pass.
C49:
R-f
gain
control
r-f
bV-
|
pass.
C2?:
Sidetone
input
coupling.
3DA2-192
C35: A.F.
GAIN
control
to
V8
control
grid
a-f
cou-
pling.
C12:
\tr1 plate
noise
limiting.
C47:
Y7
control
grid
couPling.
V8
plate
noise
limiting
CAPACITOR,
+20c/ci
400
CAPACITOR,
+Ijc/c;
200
CAPACITOR,
fixed:
paper
dielectric;
100,000
rrrf
-+l'\ch;
200 vdcw;
JAN
type
CP29A1EC104K.
CAPACITOR,
variable:
air dielectric;
plate
mesh-
ing type; 1l
ppf
max, 2
ppf
min;
straight
line
tuning; extended shaft; 360'
rotation;
Ham-
marlund
#29i51-3.
CRp,q.CftOR,
variable:
air dielectric;
plate
mesh-
ing
type;
42
ppÎ
max,5
p4f
min; 750
v
ac
peak;
360"
rotation:
Sickles
FW.
#E-102090.
CAPACITOR,
variable:
air dielectric;
plate
mesh-
ing type;
55
ppf
max,
5
ppf
min;
JAN type
cT1E055.
CAPACITOR,
variable: air
ing t1'pe;
4 sect.;
200
ppf
v ac
peak;
RCC
#17.
fixed:
papel
dielectric;3000
ppf
vdcw; JAN
type CN22E302M.
fixed:
paper
dielectric; 100,000
ppf
vdcw; JAN
type CP29A2EC104K.
dielectric;
plate
mesh-
max,
14
prrf
min;
1000
C4:
V1 screen
grid
r-f byPass'
C13:
V2 screen
grid
r-f
bY-
pass.
C38:
V8 screen
grid
a-f
bY-
pass.
C40:
V8 bias
filter.
C46:
Places
bfo
plate
at
r-f
ground
potential in PHN.
operation.
C6: Band
4 second
r-f an-rPli-
fier
grid
tank
trimmer''
C?: Band
3 second
r-f
amPli-
fier
grid
tank
ti'immer.
C8:
Band
2 second
r-f
amPli-
fier
grid
tank
trimmer'
C9:
Band
1 second
r-f
amPli-
fier
grid
tank
trimmer.
C15:
Band
4
converter
signal
grid
tank trimmer.
C16:
Band 3
converter
signal
grid
tank trimmer.
C1?: Band
2
convelter signal
grid
tanl< trimmer.
C18:
Band L
converter signal
grid
tank trimmer.
C50: Band
1
converter oscil-
lator
grid
tank
trimmer.
C51: Band
2 converter
oscil-
lator
grid
tank
trimmer.
C52:
Band 3
converter oscil-
lator
grid
tank
trimmer.
C53:
Band 4
converter
osciì-
lator
grid
tank
trimmer.
ANT. TRIMNÍER
control
B.F.O. control
3DA3-125
3DA100-1115
l
3DA100-?38
3D9011V-7
3D9042v-15
3D9055V-19
3D9200v-19
CHART:
2is"
lg x
1irl"
rvd;
1
028.
I
MANUAL
PRESET
TUN-
ING control.
Emerson
Rad
f
PD-
|
Means
of
recording
station
,
settings
for
Preset
tuner.
6D10105-57
95