Operating instructions

R3,
R6, R16
R29
R28
R9
R10
R2, R5
R8, R17
R11,
Rl3,
R33, R34
R18,
R26
Rl4, R21,
R22, R31
R1, R4, R7,
R12, R36
R20,R24,
R30
AGO
313A'
99
6.
ldentificotion
Toble
of Ports
for Rodio
Receiver
R-174/UR.R-Continued
I
T
Ref,
| -.
1
SignalCorps
symbol
I
Name of
part
and
description
Function of
part
stock
No.
RESISTOR,
fixed: comp; 4,700
ohms
-+70/ci
1/z
w;
J-A.N type
RC20BF472K.
RESISTOR,
fixed: comp;
5,600
ohms
-+10/t,;
lz
w;
JAN type
RC20BF562K.
RESISTOR,
fixed: comp;
12,000
ohms
-+l0c/ci
1/z
w;
JAN type
RC20BF123K.
RESISTOR,
fixed:
comp; 22,000
ohms
+-I07c:
1/z
tvl.
JAN type
RC20BF223K.
RESISTOR,
fixed: comp;
27,000
ohms
-+107t;
7/z
w;
JAN type
RC20BF2?3K.
RESISTOR,
fixed:
comp;
33,000
ohms
-+I\c/<;1/z
wi
JAN type
RC20BF333K.
RESISTOR,
fixed: comp;
4?,000
ohms
-+70c/ci
r/z
ty;
JAN
type RC20BF473K.
RESISTOR,
fixed:
comp;
100,000
ohms
-+l\c/c;
a/z
w; JAN
type RC20BF104K.
RESISTOR,
fixed:
comp;
180,000
ohms
-rl\c/c;
7/z
w;
JAN type
RC20BF184K.
RESISTOR,
fixed:
comp; 470,000
ohms
-+107,;
1/z
w;
JAN type
RC20BF474K.
RESISTOR,
fixed: comp;
I meg
-+10%;
%
w;
JAN
type
RC20BF105K.
RESISTOR,
fixed:
comp;
2.2 meg
-+l\Voi
lz
w;
JAN
type RC20BF225K.
R3: V1
piate
circuit
decou-
p1ing.
R6: V2
plate
circuit
decou-
pling.
R16:
V5
plate
circuit
decou-
pling.
Increases
bfo
plate
voltage in
all
positions
of S2 but
PHN.
V7 screen
grid
voltage
drop-
ping.
V3 screen
grid
voltage
drop-
ping.
V4
screen
grid
voltage
drop-
prng.
R2:
Vl screen
grid
voltage
dlopping.
R5: V2
screen
grid
voltage
dropping.
R8:
Convelter
oscillator
grid
leak.
R17:
Part
of
detector
load.
R11:
Bfo
output
limiting.
R13: Part
of
calibration
os-
cillator plate
voltage
divid-
ing
network.
R33
and
R34:
V1
and
V4
scrcen voltage
dropping;
vary
sensitivity
of
receiver
for
bands
2
and
3
during
calibration.
R18:
Part
of detector
load.
R26: Part
of
V7
and V8
grid
bias
voltage-dividing
net-
work.
R14:
Crystal
caìibration
os-
cillator grid
leak.
R21:
V6
plate
load.
R22:
Prevents
shorting
of
sidetone
signal.
R31:
V7
signal
grid
d-c
re-
turn.
R1: V1 control
grid
d-c
re-
turn,
R4: Y2 control
grid
d-c re-
turn.
R7:
V3 control
grid
d-c re-
turn.
Rl-2:
Sidetone input
limiting.
R36:
Sidetone
inpr-rt
load.
R20: VG
screen
glid
voltage
dropping.
R24: V8
control
grid
d-c re-
turn.
rf.ru: \
, stgnal
grld
blas.
3RC2OBF472K
3RC2OBF562K
3RC2OBF123K
3RC20BF223K
3RC2OBF273K
3RC2OBF333K
3RC2OBF473K
3RC2OBF1O4K
3RC2OBF184K
3RC2OBF474K
3RC2OBF1O5K
3RC2OBF225K