Instruction Book for the
Rohde & Schwarz short-wave receivers
R 8741
1163
Bl. 1
( 52 Bl.)
EK 07/2 and EK 07 D/2
Instruction
k
HO
T-
Ty
IV
R
8741
1163
Bl.
1
(
52
·Bl.,~.)
Note:
Serial
·
For
Always
Number
and,
(Translation
drawings,
quote
(FNr.)
the
in
particular,
diagrams
·see German
1ype
of
the
and
set
Editfoh
of
thEilGerman
i
1\
: j I
1;1
'I
;
'!
and
tables
instruction
Order
when
vilien
asking
ordering
R 8741/1163
edition
. l
Number
~:
of
replaceable
book R 8426/763
(BN)
in
addition
for
technical
repair
R 8426/763)
parts.
information
. . ' '
parts,
to
the
Table
of
Contents
1.
2.
2
..
1
2.2
2.3
2
-1.~
3.
3
•.
1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10.
General
Receiver
Specifications
Electrical
Dimensions
Valves,
Accessories
Preparation
Adjusting
Setting
$etting
Switching
Monitoring
Connecti.on
Connection
Connection
Connection
Connection
Remarks on
Characteristics
and
etc.
the
the
up
on
of
of
of
of
of
the
Weight
..
•
for
Use
Set
to
Mechanical
the
Earth
Headphones
Loudspeaker
a
the
Antenna
600-Q
a
Uses
..
the
Zero
Line
•
Lead
and
Specifications
..
.
Available
of
the
.
..
..
.
"
"
.
.
.
. .
AC
Meter
..
.
"
.
.
.
. .
Supply
. .
.
.
"
...
.
..
.
.
of
. . . .
. . "
.
..
Voltage
.
.
.
this
"
Short-Wave
•
1/J
• •
..
.
..
lo
.
..
0 4
..
5
5
Q.
$
8
. 8
" • 9
. • 9
. . 9
. 9
9
•
10
•
10
10
• •
1.1
•
'11
•
11
..
\-,
.i\.
8741
'1\163
Bl.
2
3.11
3.12
3.13
3.
jl.~
3.15
3.16
3.17
3
..
18
3.19
3.20
3.21
4.
4.1
·4.2
~·.3
~l
l.L
0 I
4.5
1+.
6
Connector
Connector
Connector 3 MC
Connector
Connector
Connector
Connector
Output
OUTPUT
AF
INPUT
Type
Operating
Frequency
Standardizing
Tuning
Left-hand
Right-hand
RF
Control
for
for
LOCAL
STANDARDIZING
MASTER
IF
OUTPUT
AGC
VOLTAGE
1ST
MIXER
Socket
of
Coaxial
Instructions
Dials
Check
Meter
Meter
Keying
External
EXT
.......
OSC.
OSC.
300
Socket
Connectors
. .
....
Crystal
Relay
Oscillator
OUTPUT
OSC.
OUTPUT
KC,
at
300 kc
OUTPUT
••••
0.1
V,
the
•
0 "
300
KC
~
•
250
Q
• • • • • • • • • " • • • 8
Rear
. . . . . .
•.
,llil
•
11
11
12
12
'12
12
.
12
..
12
"'-._
. 13
.
13
.
13
&
'.
•
13
•
13
"
14
1l.~
.
14
l.~.
7
Type
~·.8
AGC
of
Time
Control
Constant
• • .
I,;
~.·I··,,
q
.:_;,
•
15
•J6
2
l~.
9
Noise
Limiting
. . . . .
.
..
e
..
16
L~.
10
l}.
11
lj..
12
Translations
5
..
1
Translations
5
..
2
5
..
3
5.4
Translations
5.6
5.7
Bandwidth
IF
Beat-frequency
Volume
PJ!
Description
General
RJ:7
Section
Master
Frequency
Selection
IF
Section
AGC
for
for
Oscillator
for
and
AF
. . .
Oscillator
. .
Dravdngs
Simplified
Control
AFC
Circuit
Amplifier
Amplifier
. " .
c:tnd
Block
Section
on
Unit".
..
..
Tables
..
..
"
.
. .
on
Pp"
DiaGram
Page
34
of
.
.
"
..
. . . . . .
.
20
.o
21
and
on
Page 25
German
of
Edition
.
.
22
of
German
..
German
. .
. .
..
.
Ed.
..
Edition
16
16
..
"
"
16
.. ..
17
19
19
21
.
22
24
25
29
30
31
32
Translations
5.8
5.9
5.10
Translations
Translations
6.
6.
6.2
6.3
Translations
Translations
Table
Standardizing
Power
Monitoring
Replacement
Replacement
1
BloweT'
Mechanical
of
Detachable
for
Simplified
Section
Facilities
for
Block
.for
Checking
....
Test
for
Tables
for
Circuit
Oscillator
Diagram
of
Valves
of
Valves
Cable
Circuit
e
Page·
Diagram
and
of
Replaceable
Dlagrams
Connections
Diagram on
46
of
Page
Maintenance
on
47
Parts
Pages
P.,
German
of
German
G
106
to
38
of
Edition
Edition
116
of
German
German
Edition
Edition
36
37
37
38
40
43
44
44
4!+
45
.48
52
R 8741
.1163
Bl.
3
3
1.
Goncral
Remarks
on
the
Uses
and
Snccifications
of
this
Short-Wave
Receiver
T'he Shol'"'t-1tlave
receiver
mal<:e
for
commercial
cei
ved
ceiver
and
single-sideband
Outstanding
crimination
lin~ar
3
Me
input
timn
.±0.15
automatic
delay;
in
fixed
it
particuD..arly
iAJi
thout
is
also
features
of
tre~uency
each)
is
circuits;
against
kc
and
gain
time
constant
Receiver
and
telegraphy
auxiliary
suitable
300
cps
scale,
visible;
high
powerful
.±6
kc;
control
Type
EK
07
mobile
useful:.
radio
on
and
larc;e
telephony.
equipment.
to
receive
transmissions
are:
degree
per
where
high
local
high
mm
setting
throughout
only
selecti
of
freedom
transmitters;
swit0h-selected
with
five
va~~fable
in
D/2
finds
stations.
stntions
In
use
Its
under
•
A 1
to
conjunction
frequency-modulated
(A3a
and
A)b).
accur•acy
the
short-111ave
the
vi
t~r
adjustable
voltages
three
scale
from
steps.(0.1/1/10
of
imac;e
cross
six
IF
noise
differin.g
as
a communfuation
excellent
adverse
Al~
modulated
with
accessory
signals
of
better
range;
the
selected
rejecti0n
modulation
bandvddths
limiter;
in
amplitude
sec);
and
characteristics
receiving
signals
units
(F1
to
than
1
ko;
easy-to-read
range
with
and
(covering
three
good
selectable
very
careful
and,
switch--selected
monitoring
conditions
are
re-
the
re-
F4
and
F6)
scale
dis-
tuned
discrimina-
between
partly,
~'
·
in
R 8741,
1163
Bl.
4
type
of
control
Diversity
selection
three·receivers.
at
one
frequency..
300
kc)
can
Sideband
A
remote
ceiver
output
No
loss
indicated
Demodulator
control
over
level
in
setting
at
be.
long
of
the
(I'IiGC
is
A
transmitter
The
derived
unit
distances
the
receiver
accuracy
control
,~~
MGC
poss1ble
first
for
Type
will
unit.
+
AGG,
by
.,
keying
and
the
connection
NZ
1(1)
be
available
via a usual
is
at
is
involved;
AGC)
1'11
th
adjUEitable
inter·connection
relay
second
intermediate
of
or
the
Telegr.$:phy
before
two-wi.re
the
same
the
response
of
the
is
provided
for
frequencies
accesl3ory
units,
Demodulhtor
long
for
remote'
circuit,
time
returned
frequer~;cy
adjustment
AGC
over
to
thr~eshold.
outputs
two-way
e.g.
Type
control
which
the
of
communication
(3.3
Me
the
Single-
NZ
07.
of
the
control
on
the
two
and
the
AF'
location.
dial
or
re-
is
')
4
;!
.
2"1
Electrical
Characteristics
Total
Coarse
frequency
scales:
Vernier
Scale
.discrlinination
Setting
.time
of
temperature
scale
accuracy
30
minutes
of
range
Range IV
VI • ..
VII
VIII
IX
·XI
XII
• • , e •
after
at
15
to
25°C •
•••••••••••
..
v
I>
•
..
<I
X
...
..
~
"
an
opePatitng
ru1.
ambient
0
0.5
to
30,1
Me
to
3
..
6.1
9"
•
12.1
"
15.1
..
18
"
21
.24.1
27
..
0
approx.
.
out
better
1
1
01
.1
..
1
to
to
to
to
to
·to
to
to
to
range
"
..
e 0
"
"
.
.
"
..
..
o • 0 · • •
601
9 Q 1
12.1
15.
18.1
21.1
24.1
27
30.1
100
0
..
than
01
3
A
Me
Me
Me
1
kc
1 ko
Me·
Me
Me
Me
Me
Me
kc
per
r.am
thr·ough-
n
87~1
'11.
63
Bla
5
Range
Coarse
Vernier'
Data
Types
with
B • • • • • • • •
scales:
scale
comrnon
of
emission
accessory
Intermediate
in
the
ranges
Range
II
III
..
•
to
ranges A and
• • •
units
frequency
I
to
IV
V
to
XII
I
Q
B:
" " "
0
..
5
to
).1
Me
0
..
5
1
..
1'
2.1
100
A1,
F1,
300
1st
2nd
to
to
to
divisions
A2
F2,
kc
IF
IF
..
.
"
.
.
..
..
..
..
...
u
..
"
"
"
..
"
.
"
..
.
"
1·
..
1
2.1
3.1
A3,
3
F3, F4,
~
3
..
300
Me
Me
Me
A4
3
for
Me
kc
interpolation
A3a·,
F6JI
A3b
5
I
,.
IF
bandi·lidths"
sv1i
tch-selected
0
..
Q
~
• • •
..
,.
..
±0.
15..,
j:O.
3,
.:±0.
75
kc
j:1.5, ±3.0a j:6.o kc
filter
IF
with
rejection
IF
Image
tho
in
selectivity
bandvlidth
"
rejection
ranges I to
setting
..
. .
IV
_±0
,:!:0.3
;:,t_0
±1
±3.0.
±6.0
. .
"
.15
..
75
..
5
kc
lee
kc
l\:c
kc
kc
lit
e
. • . .
..
. .
..
..
.
..
Q
..
.
"
1...
8
"
"'
..
"
..
"
..
..
.
.
.
.
.
Q
0
.
"
.
"
..
20
db
less
.
.
thah
±0.45
less
.
.
II
.
.
..
than
±0
..
55
less
than
:J:0.85 ±2.05 .±}
less
than
±1.00
less
+1
.oo
less
±1.
70
better
better
than
than
.off
..
..
.
..
.
band
than
than
40
db
less
±.0.
less
±1.00
less
less
+2.00
less
±2
..
less
±3-50
90
70
95
10
limit
db
db
than
than
than
than
than
tha:n
in
60
less
±1.35
less
±1.50
less
less
±2
less
.±,3.50
less
,:t6
range
db
..
25
..
90
..
oo
than
kc
th;
..
kc
than
kc
than
kc
than
1\:c
than
kc
A
n
R 874)
1163
Bl
..
6
Cross
Noise
Signal-to-noise
in
IF
/
modulation
f~gure
A 1
reception
bandwidth •
•
v
to
.. ..
ratio
vli
..
XII
.
•
..
..
th
,:tO
.. 3 kc
• • • • •
80
. . e
.
better
..
an
lated
a
band
station
1o;:t
ratio
tude
is
fering.
than
approx...
..
" 20 db
30
l~O
than
interfering
50%
frequency
cross
interfering-signal
to
desired-signal
less
db
db
·input
50
for
for
for
than
mv
10
db
transmitter
and 20 kc
operating
modulation
60
signal
·
db
O.l~
IJ.V}
1e3
jlV
5
..
5
IJ.V
causes
db
and
off
on
less
when
is
input
voltage
modu-
tune
from
IF
mid-
than
the
ampliamplitude
the
inter~
smaller
::
I
I
6
in
A3
reception
IF
bandwidth
Reradiation
with
• • •
.±6
..
kc
• • •
e d a 0 0
0
20 db
1!1
)0
19
40
db
db
for
for
for
4
15
100
input
voltage
with
by
the
60
antenna
Q Q • "
Standardizing
Antenna
IP
output
AGC
AGC
AGC
connection
.,
..
time
constant
voltage
input
oscillator
output
•
" "
"
terminated
..
$ $
approx
tl
controlled
II
.0
(a)
..
5
coaxial
llV
by 300-ko
input
for
crystal
50-
to
75-Q
feeders
(b)
telephone
jack
for
high-impedance
feeders
•
forward
input
mv
than
e
0.1
for
tion
ity
and backward
the
volta3e
output
between 0.7
voltage
3 db
or 1 or
recording
of 2 or 3 receivers
l"'00Gption
10
sec,
and
control;
~v
varies
switch-selacted
for
direct
for
~nth
and
100
less
com1ecdivers-
an
H
871~1
11t~3
7
)
Monitoring
of
Audio-frequency
Noise
Output
AF
Headphones
limiter
for
power
transmission
output
socket,
antenna
response
•
" u "
broad
voltage·
~
"
<I
line
band
II
..
..
..
..
"
..
"'
..
. .
• • • • •
0
to
+3
switched
by
meter
3 db from
"
adjustable;
circuit
level
lation;
2 w
into
1
..
5%
at
frequency
6000
cps,
8 v
max
ko,
out
from 1
40
0
db
across
distortion
15 Q;
1 w
response
output
..
adjustable;
of
circuit
to
105
to
6000
can
be
switched
600
less
distortion
3 db from
impedance 4
~v
cps
Q
can
at
30%
than
approx.
be
out
1.5%
40
ke&,
of
modu-
to
EMF
7
Headphones
Monitoring
socket,
of
output
narrow
level
band
•.•.
pass-band
pedance
by
put,
meter
from
4 kQ,
from 0 .to 6 v
transmission
800
-6
to
EMF
to
line
1100
20 v max.
+16
db
cps,
for
for
output
IW
power
output
im-
out-
for
Valve
Operating
Power
2.2
·Front
Pront
Steel
check
stages
supply
..
Dimensions
panel
pa:rcl.
for
for
cabinet
•
..
and
Weight
520-rr~
19'
.. • ..
1
racl\:
rack
• · •
by
meter
...
Off,
(scale
115/125/220/235
approx.
520
x
..
.
1~82.5
540 x 325 x 552
with
Standby,
illumination)
130
va
304
mm
X 311
..
2
switch
On
(bright),
v,
mm
mm
of
47
for
22
positions
On
to
63
520-mm
(dimmed)
cpS
9
front
panel
Weight
2.3
)
with
Valves,
steel
etc.
cabinet
aeoooooeoo
........
approx
3
6
8
1
3
4
1
1
6 lamps
1 glow lamp
1 0.4-amp
2 1-amp
2 2-amp
..
65
valves
valves
valves
valve
valves
valves
EAA
ECC
EF
EL 84
E 88
E 180 F
reference
reference
(scale)
R&S
Stock
R&S
Stock
fuses
(2
x 1
amp
fuses
(2
x 2 amps
fuse
AC.supply)
1
crystal,
1
crystal,
2
crystals,
kg
901
801
805
tube
tube
No.
No.
for
R&S
R&S
R&S
S
S
S
CC
85
150 C 2
RL
RL
0,4 C
1 C
220
2 D
for
Stock
Stock
Stock
A 2
165
290
DIN
DIN
115
S
DIN
41571
and
41571
and
No.
No.
No.
41571
235
v
125 v
·
QA
15000/300
QA
16000/3000
QA
15010/300
AC
supply)
R
871~1
1
'163
Bl.
8
2.
l.!.
Accessories
..
..
..
..
• •
.. • .. .. ..
1 povver
or
LK
cord
335
R&S
Stock
No
..
LK
333
8
I
r
:\
3.
PreparQtion
3o
1 AdJust-,ing
The
receiver
To
adapt
it
~or
Use
the
Set,
is
factory-adjusted
to
115~
125
to
or
the
235
Available
for
operation.from
v~
remove
AC
the
Supply
Vol
cylinder-head
taF£e
220 v
AC
supply.
screws
at
the
lefthand and
cabinet
ble
side
at
2-amp
the
cord
at
).2
vJi
th
supply
of
the
rear
fuses.
AC
(R&S
the
receiver
Setting
the
..
the
supply
mechanical
left-hand
meter.
The
right-hand
Insert
a
voltage
power
(for
Si2
The
thi~d
voltage.
Stock
No
is
the
Mechanical
receiver
zero:
meter
this
and
slotted
edges
sui
table
on
the
section.
and
Si3).
fuse
Connect
..
LK
333:,
in
the
svlitched
.is
the
zero
screws
of
the
fuse
tapping
For
(Si1)
or1
LK
lov-ier
Zero
off~
tho
zero
of
recessed
fJ.
...
ont
into
the
panel,
220 v
For
and
115 and 125 v
must have a
the
receiver
335)
supplied
left-hand
of
the
the
pointers
of
tl1,e
the
scale
in
the
panel
and
pair
vThich
235
v,
of
is
rating
to
the
corner·
Meter
of
scale
calib:r:-ated 0
divided 0 to
meter
withdraw
clips
accessible
two 1 ...
these
AC
with
at
the
the
the
two
housing
marked
amp
are
of
0.4
supply
set.
rear.
meters
20 on
serve
the
at
fuses
to
amp
using
to
the
receiver
with
be
the
the
lower
are
provided
replaced
independent
the
The
connector:;
must be
6 v
for
right-hand
for
correction.
from
its
availa:,..
by
of
power
at
the
the
n
871+1
1163
Bl.
9
3.3
Setting
Take
_2
care
flow
out
..
4
Switching
The
receiver
position.~~
the
STA1mBY
applied.
In
the
ON
the
lamps
DH·TIYIED
scale
ceiver
put
position
lamps
must be
the
up
that
through
is
this
position
This
BRIGHT
of
the
light
r::Jcotver
air
can
the
on
(see
swi
tbhed
switch
position
position
tvto
the
h,eator
only
ready
into
freely
round
hole
front
on
iNi
has
the
the
valves
has
been
the
frequency
and anode
dimly.
for
operation
opo;,.,r.d:,ion,
enter
panel.~~
th
positions
heater
throurth
(of
the
page
.
the
are
heated
provided
dials
v.
blower)
~20''of
'·
power
STfu'JDBY.~~
for
and anode
and @
supply
This
position
whi1e no
first
isot
the
perforation
at
German
switch
but.
no
short
supply
voltages
is
therefore
scale
the
switch
the
rear.
edition)
@i.
ON
anode
Apart
BR~GHT
supply
interruptions
voltages
light
brightly.
are
also
selected
illumination
to
ON.
of
the
from
and
ON
voltage
are
present
is
BRIGHT
bottom
its
DIMMED
of
operation.
applied
In
the
but
if
the
needed.
..
off
..
is
ON
and
In
and
the
re-
To
9
About one
minute
after
switching
on
the
receiver
is
ready
for
operation,.
The
full
3?5
The
marlced 1
In
setting
Monitorinrz
tion)
CtillCK
receiver
each
should
(a)
Switch
(b)
Switch
( 0)
Switch
(d)
Turn
(o)
No
be
ANTENNA
accuracy
(see
switch~
stages
to
of
obtained,
Till\iiNG
voltage
27 and
the
22
to
IF
FREQUENCY
must
50-75
is
front
and
be checked.,
the
dial
switch
The
BANDWIDTH
CONTROL
knob
Q
be
(both
® so
reached
panel
the
left-hand
FoP
of
the
positions
following
at
at
AGC
..
RANGE
that
applied
at
the
after
page
2o
this
meter
a
pointer
conditions
11
0
..
15
set
so
cursor
to
the
rear)
about
meter
one
and
rear
~
purposeJI
has a red
deflection
and
kcu.
that
range
0
of
soclcets
(disconnect
hour.
view page
permit
the
mark below
settings
VI
frequency
ANTENNA
antenna).,
the
switch
within
appears
HIGH
22
o'f German
most
has
the
the
the
are
required:
in
dial
is
IMPEDANCE
important
22
positions
two
scales
red
mark
the
window
at
10
and
edi-·
..
(2)
.. 6 Me
..
..
(f)
In
keying
(g)
In
CRYSTAL
(h)
In
rear
3
..
6
Connection
Connect
the
earth
3
..
7
Connection
Connect
NARROW
to
be
the
sv;itch
relay
the
svJi
tch
300
the
sv.Ji
toh
must
not
the
earth
symbol
the
headphones
..
The
inscriptions
transmitted.
po:3itions 2 and
must be open
position
1\C
button®
positions
be
pressed.
of
the
Earth
lead
at
the
cL)
.
~.,,.1
of
Head1Jhones
either
BROi\D
The
PHO~ms
..
6
the
must
10
Jl
Lead
rear
to
and
BROAD
18
the
TUNING
be
11,
13
to
one
sockets
NARROW
sockets
rear
CHECK
pressed.,
and
14
of
the
~
sugsest
with
connector
button
the
button
telephone
PHONES
the
the
for a transmitter
0
or
the
.
EXT
..
OSC.
jacks
BROAD
frequency
or
~
audio-frequency
range
STAND
marked
..
at
PHONES
range
40
the
with
to
R
8741
11
f7..
Bl··~,-
lo
6000
the
cps
are
frequency
suitable
range
for
800
telephonyJI
to
1100
cps
whereas
are
for
the
PHONES
telegraphy.
NARROW
sockets
with
10
A
three-polo
soclcot and a
pair
of
sockets
are
provided
at
the
rear
for
the
connection
ed
in
parallel
Hith a Tuchcl
sockets
2,9·
Tvro
75
l
HIGH
Since
for
3a10
with
Connection
connectors
Q
for
a lovJ-impedance
IMPEDAl'JCE
both
balanced
Connectton
of
a loudspeah:er
and marked
type
plug
a
1.~-mm
plug
of
the
aro
provided
sool<:et
antenna
inputs
an.tennae.
of
a 600-Q
of
POHER
T
3079
about
(R&S
15
OUTPUTS
Stock
Q
15
input
Q.,
No.
impedance
The
three-pole
FTS
20315) and
..
Antenna
at
the
antenna
rear:
connected
(a)
the
coaxial
via a coaxial
for a conventional L or T antenna
are
unbalanced, a suitable
transformer
Line
..
These
socket
the
input
line
Sl
without
are.
connect-
mates
pair
of
ANTENNA
(b)
the
50-
ANTENNA
transformer
must be
..
used
R
~71~'1
1163
.11
If
the
audio
telephone
LII~
FTS
3~11
This
OUTPUT
20315).
Connector
pair
break-in
is
inserted
are
switched
when
the
button).,
An
external
input
at
output
line,
6oO
connect
Q. The
for
of
sockets
operation.
into
each
out
of
two
lines
frequency
the
rear
voltage
this
suitable
Keying
at
the
Each
of
operation.
are
connected
(esg
to
replace
is
to
line
Relay
rear
of
the
the
sockets~
The receivel"' recommences
..
from
the
be
passed
at
the
rear
plug
is
the
permits
t~10
sockets
to
each
a·deeade
frequer~cy
the
the
first
other
exciter)
of
on~
for
example,
to
the
Tuchel
type
connection
3-pole
socket
T
3079
of a keying
contains a switch.
RF
(e.g.
the
valve
can
built-in
and
to
operate
through
be
fed
local
via
a 600-Q
marked
(R&S
Stock
line
If
a
4-mm
the
first
IF
'-immediately
a microphone
to
this
coaxial
oscillator.
No.
for
plug
valve
11
If
the
button
above
the
input
is
pressed,
the
built-in
local
oscillator
is
SV'dtched
locked
).. 13
The
above
nal
3.14
The
off
if
it
Connector
external
the
socket
3-Mc
frequency
Connector
frequency·
and
is
turned
3-Mc
of
the
path
3
r~1C
EXT.
signal
is
pressed
is
LOCAL
the
local
about
available
OSC.
·may be usedilfor. example,
3.15
Connector
STA~IDARDIZING
is
free
90
can
be
and
OUTPUT
oscillator
as
mastet'
OSC.
for
the
.external
0 '
in
the
depressed
fed
to
this
coaxial
locked.
at
this
If
socketo
is
avail.a.ble
the
oscillator
OUTPUT
300
KC
frequency.
position.
sock@t
button
1
at
·
frequency
is
this
when
released
coaxial
in
diversity
The
the
button
button
the
inter-
socket.
reception.
is
'It
R.
8741.
1163
Bl
..
12
The
frequency
socket
3.16
The
for
3.17
The.
at
Connector
frequency
measuring
Connector
IF
(300
voltage·is
ample
~Jpe
3.18
the
NZ
Output
of
the
the
rear.
MASrrER
(3.4
to
purposes,
IF
OUTPUT
kc)
is
available
about
0.1
Single-Sideband
07,
can be
AGC
connected
VOL!~GE
300-~c
OSC.
6.4)
standardizing
OUTPUT
of
the
at
this
300 KC,
at
v,
the
output
Demodulator Type
to
crystal
master
coaxial
·o.
this
output
1
V,
250 Q
coaxial
oscillator
impedance 250 Q.
NZ
this
output.
at
socket
10
or
is
available
is
the
rear.
at
An
the
available,
the
rear.
accessory
Telegraphy
at
this
for
The
unit,
Demodulator
coaxial
example
output
for
ex-
.These
AGC
voltage
ceivers
outputs.
ceivcrs.
two
coaxial
may be used,
may:
:be
The
AGC
Tho
AGC
s·ockets
combined
time
voltaees
at
the
for
examp.l.e,
for
di
constant
are
! l
rear
for
ver~1i
ty
ir:;.
retained
selected
are
connected
recording.
:t"eception by.
independently
automatically
in
parallel..
Moreover, two
·connecting
of.
and an
.
The
or
their
the
number
external
a:vailable
three
AGC
voltage
of
selection
re
12
re-
...
unit
is
not
required
v1hen
the
AF
outputs
of
the
reoei
vers
are
connected
in
parallel
3.
19
Output
Part
of
(Ro12I
IF
3.20
An
able
in
si~1al
AF
AF
signal
at
pressed
3.21
The
Amphenol
Type
eleven
so
the
the
can
INPUT
the
..
The
No
that
1ST
voltage
RF
be
Socket
applied
AF
outputs
button
of
Coaxial
coaxial
..
82 -
the
AF
output
~1IXER
section)
taken
Socket
across
out
to
this
when
can
be
Connectors
sockets
501~,
or
the
is
available
or
coaxial
the
locked
at
VG
standard
voltages
cathode
another
button
by
at
the
rear
are
resistor
at
this
signal
socket
to
the
turning
the
Rear
are
connectors
added.
(R27 + R28)
coaxial
can
be
at
the
right
about
Amphenol
No..
socket
fed
rear
of
the
90°
in
sockets
95241
of
in
for
is
amplified
input
the
of
..
the
1st
..
In
this
special
and
socket
depressed
the C series,
mixer
way,
an
purposes.
avail-
is
position
..
R
87L~1
1163
Bl
..
13
)
4.
Operating
The
operation
4.1
Frequency
The
frequency
~
and
of
the
twelve
kc.
In
the
on
these
polation.
taken
the
full
thus
The
divided
0
line
6.5755
on
pointer~
rotation,
constitutes
effect
into
of
the
of
the
Me
of
range
the
vernier
frequency
frequency
scales,
In
the
these
is
the
two
large
pointer
is
adjuzted
Instructions
the
receiver
Dials
scales
of
corresponding
(see
also
is
selected
y~ob
scales
ranges I to
while
frequency
a
hundred
scales
the
and
the
large
magnification
same
as
0.0005-l\1c
is,
of
the
for
..
~serve
the
if
(see
front
is
described
page
21
with
I
scale
ranges
scale
scale
to a frequency
each
for
example,
round
the
for
to
XII
III
(Oa5
~·(100
IV
to
~which
advances
of
e~ch
091-Mc.division
divisions
scale
panel
of
XII
is
page 20
in
the
following
German
wing knob @
tuning.
and
to
divisions)
0.1
change
0
..
1-Mc
between
at
the
3e1
(3
..
is
..
If
75.5
1
edition)
The knobs
round
Me)
to
calibrated
Me~
distance
of
the
6.5
ko,
of
scale
the
may
)0.1
the
of
100
these
hairline
and
the
German
sections.
..
The
crank-type
m~ve
~
reading
~e
used
Mc)1 the
·o
to
round
scale
ko.
The
o:t;
the
nine
of
6
..
6
Me,
reception
edition)
knob
the
pointer~
calibrated
is
taken
for
inter-
reading
100
kc.
performs
round
scales
scales
the
pointer
while
frequency
only
is
While
scale
IV
were
the
in
to
sub-
hair-
a
XII
·
of
..
13
rrhe
tuning
mi
stal\:e
1.~.2
Standard
The
300-kc
XII
and
lmob
can
be
dur:Lng
the
operation~
Crystal
stand~rdizing
zero
of
the
braked
300
kc
crys~al
scale
with
calibrated
the
permits
small
the
0
knob
calibration
to
100
@
kc
to
to
of
be
avoid
the
checked.
rotation
12
scales
Set
by
I
the
to
COl~nrROL
press
the
of
such a point,
At
300
V,
for·
absolutely
rou.r1d
The STAND.
in
.switch
the
STANDs
headphones
300
l<.:c.
this
point
kc.
The 300-l\:c
ocale
the
this
scale.,
depressed
marks
check
@
CRYSTAL
(BROAD)
\~hen
necessary
CRYSTAL
the
one
the
~iliich
6.3
only
Correction
positiono
to
tU1"ling
finds
pointer~
calibration
are
r1c, 6$6
so
that
300
MGC
..
advance·
300
or
loudspeah:er
lu""lob
the
zero
extended
Me»
far
that
the
is
possible
KC
button@
KC
button@.
boat,
should
points
6.9
the
zero
the
is
slowly
below
Me
beat
beat
by
RF
at·
where
be
at
are
the
etc..
coincides
turning
can
CONTROL
A
all
scale
turned
the
·a
division
identified
base
Advance
notes
be
locked
beat
teat
are
the
knob
note
points
forward
note
which
on
line;
with·the
for
the
RF
well
screwdriver
if
it
@
sufficiently
is
then
that
and
backward
has
become
is a multiple
the
scales
example,
CONTROL
audible..
0 ko
is
turned
audible
are a multiple
knob
It
mark
adjustment
about
in
at
inaudible.
of
I
to
XII
on
scale
@
is
not
of
the
(V
90°
and
..
n
'l
'163
Bl
871+1
14
If
the
TD~ING
to
the
transmitter
section
~can
Tho
receiver
tho
meter
1~
..
be
stages
2)
which
locked
@
level
CrillCK
serves,
and
of
button~
frequency1
is
reduced
in
the
same way
as
mentioned
to
measure
the
600-Q
is
a
beat
to
the
line
depressed
note
zero
beat
as·
button~.
ir1
output
out.put
is
by
section
voltage
..
the
receiver
obtained
accurate
3
..
5
of
,l!
to
the
can
again;(as
tuning..
check
15-Q
be
tuned
described
.The
the
most
poi~'ler
accurately
button
important
outputs
in
and
14
r:[b
measure
(at
age
0
to
To
measure
the
roar)~
with
6
the
v~
the
the
output
sot
IfF
VOLU1\1E
output
the
voltage
CHECK
l~no
b
level
of
of
the
the
parallel-connected
to
EOuT
the
15·Q
reading
15-Q power
Adjust
on
the
(at
the
the
scale
rear),
calibrated
set
the
CllliCK
upper
put
level
\r-lhen
the
applied
'rhe
input
cllcat,ed
lmob
during
receiver
'rhe
linear
position
switch
right-hand
is
read
CONTROL
to
thG
voltage
on
t.hi
s scm.le,
~~.o
that
this
adjustment
nrt.v:~t
not
scale
of
the
to
EOUT
cor-ner
on
the
m11itch
antenna
(p.v)
the
input@ The
above
Set
meter
no
.be
ttmed
divided 0 to
CON'I'HOL
600 Qe The
at
the
rear
scale
calibrated
is
which
swi
toh
indicates
voltage·must
to
20
svlitoh
slotted
serves
at
AGC 9 the
scale
automatic
calibrated
to
the
be
transm:t t
ter•
(propot·tional
for
relative
shaft
to
adjust
to
meter
control
MGC
+
desired
applied
0
to
marked
LINE
the
+16
db.
indicates
to
10P
JlV
AGC
voltage
to
current)
takes
and
the
•·''(
place
adjust
It
antenna
serves
measuremcints, e
LEVEL
level
..
in
The
the
is
is
also
the
RF
CONTROL
is
obv:l~ous
input
in
the
gM
the
out-
in-
that
and
MGC
the
H
871~1/·
<i
1 6
')
5
comparisons
The
adjustment
of
the
receiver
The
CONTROL
pos:ttions
MGC + AGC
correspond
position,
vJhere autorna
..
Adjust
value
must
in
not
!J.Vu
be
a
of
switch
tic
this
No
ttlned
·the
if
the
to
automatic
control
knob
voltage
to
a
RF
CONTROL
CONTROL
serves
the
switch
to
usual
J.r~ob
select
faoili
·control
starts
so
that
can
the
be
right-hand
must'be
transmitter~
while
determines
is
at
IVJGC
the
type
ties
pr•ovided
starts
pred~te:r·mined
at a given
meter
to
the
antenna
tlrls.
adjustment
the
or
of
control.
on
with
indicates
MGC
input
the
input
sensitivity
+
AQC
~--
The
receivers.,
voltage
RF
CONTROL
the
and
the
made. With
..
MGC
In
desired
receiver
(gain)
and
AGC
the
The
knob
MGC
point
+
AGC
it
is,
for
to
reduce
~the
average
noise
lovel
still
retain
The
of
is
mainly
AGC
the
the
TIIVill
automatic
for
occasionally
In
the
OFF
'l'l~w
noise
The
noi;-Je::
CONSTANT
for
b0
position
limiting
of
automatic
sw:l.
toh
reception
of
Sitli
becomes
causes
to
toh
more
certain
control
1
sec
J
while
(A1)~
Should·sclective
the
noise
effective
distortions
the
sec
thCJ
·while
selection
or
10
"l
SEC
with
limiter
the
of
the
/W
sec
and
is
knob
AF
of
three
The 0
::10
SEC
a
switched
is
turned
vol
time
;1
SEC
tion~'l
time
out
constants
may
constant
of
clocl\:vrlse
The
6
values
For
In
the
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note
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kc
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is
connectors
R
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16
and
output
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the
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rear
power
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this
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eigen
MHz
eigen
fremd
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Power
Connector
Output
AGC
Antenna
Button
Button
Button
Button
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released
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for
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transmitter
local
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Master
IF
Button
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level
osc.·
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output
AF
-~
.
2 Q 1 General,
The
RF
signal
(see
simplified
arriving
from
block
the
diagram
antenna
page 25
pass~s
through
of
German
an
RF
three
tuned
of
prevent
mixer
300
converted
rejection.
by
quency
The
six
ceiver.
each
odyned by
in
In
circuits
12
sub-ranges
in
koe
the
second
of
amplifier
svli
tch-seleoted
other
the
adjustable
the
power
to
powerful
the
ranges I to
The
RF
signal
into
The
3
mixer,
300
kc.
for
Next,
the
by
two-section
the
signal
stage,
the
first
achi~ve
1
stations
arriving
the
first
3-Mo
IF'
where
In
this
the
second
bandwidths
signal
from
noise.limiter
the
mixer
a
from
entering
IV
AF
0~5
in
intermediate
signal
it
case,
passes
bru1d-pass
the
is
converted
the
IF
contains
provide
through
BFO.
which can be
signal
The
to
6.1
the
ranges V to
frequency
applied
set
for
The
AF
is
amplified
circuits
The
RF
Me
is
conver.ted
XII 6e1
of
to a four-section
into
the
is a double
two
four-section
the
overall
three
other.IF
and
1
switched
and
is
can
permit
to
3
Mo
second
then
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be
in
or
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J~
to
to
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filters
out
to
filter
Jj
coupled
of
the
.1
which
of
circuit
LINE
selection
and
.of
Me
followed
or
first
the
with
the
to
heter-
OUTPUT
i
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I
I R
8741
63
~
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or,
of
headphones
The
possible
followed
arrangement
special
receivers
without
ferent
and
can
adjusted
19
via
the
design
additional
control
manual
be
reduced
AF
VOLUME
may
level
by a
for
two-stage
of 4 diodes
of
of
the-Type
actions,
plus
while
for
are
control,
be
connected@
of
the
receiver
the
individual
the
circuitry
EK
use
of a comparator-selector
automatic
signals
controlled
AGC
amplifer
in
order
07
D
namely
in
to
the
is
amplifier
to
used
to
be.direotly
automatic
control
whc)se
the
AF
carefully
whose
produce
to
produce
gain
where·
strength
usual
way8
designed
output
five
the
connected
circuit@
control,
the
is
to
to
~
The
signal
different
AGC
for
manual
than
·whi-ch
fourth
is
applied
AGC
There
the
for
IF
are
of
the
threshold
the
to
an
• The
three
control
reoei
best
is
several
ver
level
I
I J
The Type
EK
07
differs
D
from
conventional
receivers
particularly
in
the
con-
trol
of
which,
mixer
the
ly
a
when
master
low,
particularly
can be
geared
of
the
0.,5
to
quency,
In
the
into
the
frequendy
a
frequency
·is
effected
first
the
a
via
buffer
operating
oscillator
frequency
high
set
using a coarse
30
:
1.,
The
vernier
6.1
i.e.
tuning
Mo,~~
the
the
intermediate
ranges V to
first
and
mixer9 but
is
automatically
error
through a capacitor,
oscillator·in
stage,
in
in
range
supplies
the
the
(3
..
4
frequency
tuning
scale
discrimination
scale
oscillator
XII~
6.1
its
of
.:±.0
cps.
the
ranges
its
ranges
range
to
I
IVQ
6 4
Me)
stability
to
The
..
control
corresponding
frequency
frequencty
to
30.1
Me,
frequency
controlled
The
automatic
which
in
V
signal
III
latter
For
The
in
addition
is
thus
to
is
300
is
300
•
the
is
now
by a
controlof
turn
to
XII
..
in
the
to
(0
has
this
reason,
frequency
excellent,
100
ko.,
ka
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coscilletor
3~3
Me
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controlled
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usual
1
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only
of
oscillator,~~
manner
replaced
is
a
it
could
the
master
to a vernier
each
In
the
ranges
than
the
~~~~•u
higher
than
circuit
the
local
by 2
to
the
relative-
1
be
oscillator
control
I
to
the
with
oscillator
diodese
first
by
turn
IV
For
this.purpose,
of a 3-Mc
compared
voltage.
crystal
crystal,
with
In
with
other
A·standardizing
calibration
frequency
buttone
by
obtaining
check
of
This
the
frequency
converted
the
latter
words,
its
harmonics,
oscillator
against
this
crystal
is a very
zero
beat
of
to
on a
the
components
and
controlled
its
to
the
simple
between
the
local
the
frequency
phase-sehsitive
determining
the
master
by a 300-kc
harm0nics.
last
method
the
~esired
Moreover
IF
stage
of
checking
of
the
oscillator
crystal
.
6
when
the
carrier
is.
master
the
..
it
is
pressing
tuning
and
the
with
,
harmonia
are
the
and
AFC
permits a receiver
possible
of
the
the
to
apply
TUNING
receiver
CrlliCK
300-ko
the
H
87~t1
1\16:3
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..
aD
20
Ante nne
fiF
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2.
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2.
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Antenna
RF
stage
1st
mixer
1st
IF
2nd
mixer
2nd
.
IF
Vierkreis-Filter
Storbegr
NF
..
Leitungsausgang
Leistungsausgange
Harer
breit
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A
tar
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to]j';
Four-section
Noise
AF
Line
Power
Phones
limiter
output
outputs
broad
Phones narrow
AF
AF
volume
filter
control
Standardizing
Local
Ph~se
Master
AGC
AGC
BFO
oscillator
sensitive
oscillator
voltages
1
amplifier
filter
oscillator
bridge
Vereinfaohtes
kHz
MHz
I
I
R
871+
1
1•J
63
Bl.
21
Blocksohaltbild
Simplified
ko
Me
block
diagram
5.2
RF
Section:·.:
(see
block
diagram
page
46
and
circuit
diagram
page
10 6 of
German
The
mixerJ·the
diodes
voltage
ANTENNA
the
edition)
RF
section
l0cal
for
automatic
protection
50
~'
coil:turret
contains
..
75
the'high-impedance
low-impedance
tap
of'the
via
series
the
output
the
receiver
to
check
missibly
the
high
input
coil
capacitors
of
the
input
calibration
input
receiver.
the
oscillator
frequency
circuit
Q and
HIGH-IMPED.
(frequency
input
is
taken
of
the
first
to
standardizing
when
the
voltages
RF
amplifier
with
its
control
R11~
The
range
to
switch
the 11high
~ia
the
tuned
the 11high
oscillator,
button
of.
the
receiver.
and
thus
circuits,
of
two
antenna
ANT.
INPUT,
S1)
side"
break
circuit
side"
S8,
STANDARD.
ensures
with
the
in
of
contact
or,
of
the
instead
its
two
local
inputs
are
the
the
in
circuit.
tuned
other
oscillator,,and
at
taken
RF
section.
first
a1
of
the
ranges
of
the
CRYSTAL
The glow lamp Rl1
over-voltage
circuits,
amplifiers,
the
rear1 marlced
via
coaxial
C 244
tuned
the
circuito
relay
above 15.1
Relay
300
50
RsA
75-0
KC,
fires
protection
the
two
an
lines
RsA
connects
socket,
is
at
inad·
first
over-
The
to
Me,
for
to
a
to
the
R
11
Bl..
'874J
6.3
'.22
A
tuned
tenna
stead
even
stage
and
of a single
very
as
quency.
C246
to
voltage,.
filtering
cathode
received
the
sensitivity
Another
Ro12I.
pacitive
are
replaced
and
inductively
the
RF
strong
long
as
For
matching
taps
on
the
"Rsp
II",
elements.
configuration
signal
to
of
tuned
Both
circuit
valves
voltage
and a change
coupled
amplifier
tuned
circuit
signals
the
interfering
the
secondary
is
applied
The
low-noise
offers a high
such
an
the
receiver.
is
are
loosely
divider,
valve
from a
input
circuit
to
extent
inserted
resp.)
in
capacitance
band-pas~
R011&
ahead
nearby
The
of
t~e
station
frequency
level,
the
the
of
the
control
variable-mu
receiver
.
that
the
between
coupled
so
that
to
no
results
filter
use
of
first
do
is
not
control
band-pass
grid
pentode
sensitivity.
nois~
the
RF
this
circuit
detuning
is
inserted
this
band-pass
amplifier
not
overdrive
too
close
grid
of
filter.
of
this
used
of
the
mixer
amplifier
(by a
will
therefrom.
between
ensures
to
Ro11
valve
in.a
It
amplifies
no
and
coil
occur
The
the
filter
that
the
first
the
tuned
is
coupled
A
special
through
grounded-
longer
the
1st
tap
if
the
RF
an-
in~
fre-
AGC
the
affects
mixer
or
ca-
valves
selec-
by
2.2
tivity
secured
by'three
tuned
circuits
prior
to
the
first
frequency
changing
eliminates
degree.
nearby
R012I
At
receivers
of a low-noise
cillator
control
tors
grid.
R27
panoramic
Section
the
Ro13I,
from
lator
and 3.3
Ro13I
Ro12II
mixer
the
the
frequency
Me
does
image
the
voltage
The
and
R28
adapter,
so
that
local
anode
above
not
frequencies,,
same
time,
remain
duo-triode.
is
applied
OUTPUT
permits
or a reference
of
the
duo-triode
the
local
oscilla
supplies
lies
.300
the
input
operate
as
etc
.. ~ and
reradiation
undisturbed.
It
to
the
1ST
MIXER
an
IF
voltage
frequency
is
oscillator
to:r
with a tuned
the
signal
kc
above
frequency
an
oscillator
is
The
is
an
cathode
socket
to
connected
is·
required
the
input
in
but
reduces
suppressed
1st
mixer
additive
and
the
connected
be
taken,
to
be
between
not
influenced
gl"'id
circuit
by
the
frequency
the
ranges V to
as
an
cross
to
makes
mixer
RF
between
e.g.
fed
1st
amplifier
modulation
such
an
extent
use
of
where
input
the
signal
the
for
connection
in
for
checking
the
local
by
the
and
inductive
mixer,
in
XII.
The
the
ranges I to
In
\'lith a tuned
to a high
that
the
section
local
to
the
cathode
purposes
oscillator
input
frequency.
feedbac.k
local
the
range
os-
resisof
a
and
oscil·
IV
IV,
anode
circuit
via
the
since
contacts
dividually
mixer
and
the
Minimum
in
EXT.
on
and
Ro12--
the·
variable
operating
cross
range
OSC..
the
same
if
the
Contact
oscillator
cathode
tor
out
of
for
which
IV
th~ough
socket
frequency,
button
c1
of
to
resistor
operation.
in
this
case
the
b2
of
the
relay
the
range
also
resistor
point
by
modulation
is
used 8 for
IV
depends on
inserting
is
the
range
i.,e.
11
R425-
thus
for
S14 ·above ··the
relay C switches
the
EXT.
of
OSC.
the
input,
local
master
RsB.
the
bias
the
and
a
variable
ensured
switch
example
twin
soc~et
the
grid
whereas
oscillator
oscillator
Contact
voltage
functioning
determines
resistor,
in
this
wafer
to
S1IIR.
connect
reception
is
pressed.,
of
the
the
Ro13I and
supplies
b1
of
this
relay
for
the
control
of
the
a more
favourable
R481 in
range.
Relay
two
Relay
RsC
receivers
with a common
section
contact
Ro12II from
c2
thus
puts
the
required
switches,
·limiter
diode
position
parallel
RsB
is
is
energized
for·
local
disconnects
the
local
signal
in-
of
the
first;
Ro74I
of
to
R425,
energized
if
opera
oscillator~~
the
ti.on
local
the
oscilla-
R
11
Bl
'$741
6'3
'
..
23
The
local
er.
The
through
the
frequency
oscillator
output
of
capacitor
control
also
the
C269
drives
cathode:
..
In
addi-tion~~
section
Ro13II,
follower
is
taken
which
is
conneote'~
the
oscillator
via
C276
is
connected
to
voltage
(K2)
the
from
as a cathode
socket
LOCAL
applied
the
input
to
of
follow-
OSC
Ro43
Ro1
..
in
In
the
ranges V to
XII.,
the
AFC
diodes
Gl1
- Gl2
are
connected
to
the
grid
circuit
of
+10 v bias
via
C288
cont~ol
of
nected
the
5.3
of
The
the
.section.
the
control
in
frequency
Master
German
master
range
tracking
local
and
oscillator
high
the
oscillator
via
the
filter
and
obtains a control
The anode
voltage
parallel
of
with
the
Oscillator
edition)
osoilla.
of
).4
exists
tor
to
6
between
tuned
setting
accuracy
via
section
resistances
so
that
the
resonant
local
oscillator
(see
block
is a highly
..
4
Me
with a very
the
ri1aster a
circuit.
to
be
trimmers
C204
R46/C290/C289
voltage
the
from
of
the
capacitance
circuit
back
diagram page
s·table 1 adjustable
linear
scilla
This
enables
obtained
in
to
C239
..
Diode
the
AFC
diodes
of
tha
becomes more
to
its
proper
46
and
tuning
tor»
the 3 RF
excellent
range
A (3.1
..
Diode Gl2
Gl1·is
circuit
vary
particula~
obtains a fixed
earthed
in
the
with
the
effective
value@
circuit
osoilla
diagram page 107
tor
characteristic
timed
scale
cir.cui
discrimination
to
30.1 Me)
frequency
amplitude
trimmer
and
t'lhich.
..
Correct
ts
since
for
RF
con-·
brings
covers
and
the
in
::.:;
R
8.74J
116.3.
Bl.
24~
range
IV
mixer and
,quency
tor
the
.of
tuning
vernier
directly
corresponds
the
sum
of
cillator
desiccant,
after
The
lator
valve
citors
any
years
master
..
The
via
1s
\Change
' '
the
master
in
ranges V to
the
local
characteristic
scale,
calibrated
to
the
is
hermetically
oscillator,
oscillator.
which
in
exactly
values
XII
the
and
is
geared
frequency.
100
kc.
indicated
sealed.
instead
master
Because of·
the
fact
Each complete
The
on
Any
which under normal operatil).g
of
service.
oscillator
temperature
the
capacitive
such
that
in
valve
Ro21
(see
ciroui
compensated
voltage
the
cil"'cui t need iJot be
capacitance
divider
in
of
the
local
oscillator
the
linearity
.tM.t
30:1
ranges,IV
in
relation
rotation
frequency
the
main and
resid~al
reading
vernier
moisture
conditions
t diagram page :.107) .
tuned-circuit
connects
C305 -C)06
retuned
:cc,mparison
'I
! \
to
oscillator,
is
used
to
of
the
to
XII
to1the
is
main
of
the
obtained
scales
present
need
not
be changed even
is
a
to
..
The value-
after a valve
C306
remains
feeds
correct
master
cover
scale,
vernier
directly
..
The
is
removed by a
tuned~grid
the
oscillator·
of
change~·
the
first
the
fre-
oscilla-
exactly 3 Me,
can be
scale
from
master
os-
oscil
these
capa-
since
negligible.
...
·
The
amplifiers
the
oscillator
Ro22I and
valve,
amplify
Ro22II,
the
which
are
oscillator
loosely
output
connected
to
the
required
to
the
anode
level
of
and
provide a buffer
balanced
as
an
connects
phase
2·4
page
The
frequency
for
tuning
In
ranges I to
mixer
output
amplifier
to
sensitive
Frequencl
1
09
of
the
first
the
local
stage.
diagram page
I ~ -
passed
on
to
between
which
in
the
MASTER
bridge
Control
German
control
IF
of
oscillator
IV,
This
'1
Gi9.)
the
1st
in
this
range).
OSC.
in
Section
edition)
section
3.3
Me, a crystal
an
intermediate
signal
and
via
IF
stage
the
load
range
OUTPUT
the
in
is
sent
the
and
the
IV
is
sent
A second
socket.
master
(~ee
oscillator
block
contains
oscillator
ranges V to
frequency
to
the
break
located
contacts
in
oscillator.
to
the
connection
The
balanoed'output
diagram page
the
2nd mixer
XII.
of
frequency
i2
the
selection
Valve Ro22II
local
from
section.
with a four-section
and
the
·
0.3.Mc
control
and k2
oscillator
the
unbalanced
46
and
circuit
stages
is
taken
section
of
relays
amplifier
has
(Qperating
oonnects
diagram
necessary
from
the
(see
Rsi
and
unit
one un-
output
to
the
filter
for
first
circuit
RsK
(see
cir-
'
R
11
Bl.
$741'
1
6.3
25
cuit
diagram page
frequency
Me
were
changed by
·and
the
trol
ly
coupled
the
RsK
IF
signal
grid
mixer
respectively
noise
signal
3-Mc
The
a
triode
of
crystal
3-Mo
tuned-grid
circuit
to 1 ts
f".lndamental mode.
by means
·triode
and
110).
and
the
image
used.
are
For
this
the
second mixer Roit1I
energized
(3.3
Me)
of
the
second mixer
four-seotipn
are.
connected
to
ensure
and
additive
3
..
0
Me
obtained
oscillator
crystal
oscillator
and tuned-anode
has a resonant
of
the
trimmer
. .
has a tuned
In
ranges V to
frequency
reason,
via
the
the
range
coming from
stage
filter
~o
good
•.
The
taps
of
matching.
mixing. Applied
from
Ro~·2.
the
Ro42
circuit.
frequency
The
rn:-ystal
C534.
c~rcult
The
connected
XIIJ
would be
first
to
the
switch
. . I
the
first
via
lead
the
second
opepates
The
of 3 Me
is
screen
the
too
IF
in
second IF
S1IIR
mixer
the
make
to
the
coils
The
of
second mixer
to
its
half
similarly
crystal
and
is
brought
grid
is
to
it.
difference
small
this
if
ra~ge
of,0~3
(in
the
stage
contact
filter
the
first
an
RF
is
·12
and
between
IF
is
Me.
the
and
also
o~~hode
is
of'R:0.41i1Iwhioh
to a triode
which
excited
exactly
used
This
is
in
to
as
the
circuit,
located
parallel
its
the.received
frequency
3.3
Me,
which
The
relays
section)
applied
and
to
the
capacitive-
so
connection
fourth
circuit,
employs a low•
the
oscillator
is
driven
oscillator
in
resonance
rated
anode
whose
frequency
of
resonant
of
thatl
the
by
the
the
0.3
is
Rsi
con-
of
the
with
grid
't.
frequency
the
crystal
the
screen-to-control-grid
is
tuned
frequency.
higher
The
than
that
feedback
capacitance.
of
the
to
maintain
An
o~Jstal,
operates
oscillations
output
of
3.0
inductively
passes
Me
is
through
obtained
at
at
the
tuned
anode
circuit
Ro41II + Ro41I
the
3
MC
INT/EXT
socket
of
the
and
Also
er~tor
This
which
ranges V to
9.0
Mc,
is
depressed,
the
valve.
valve
an
and
external
located
which produces a spectrum
spectrum
are
switched
XII, a different
Me,
range
range
XI
..
This
socket
At
the
the
crystal
frequency
in
the
is
passed
VII
12.0
24.0
Me,
and
signal
relay
same
anode
into
range
is
for
time
is
of 3 Me
circuit
on
circuit
Me,
fed
via
is
also
checking
RsD
energizes
resistor
shorted
via
one
with
harmonic
range
XII
VIII
27.0
an
RF
transformer
fed
viA.
purposes.
and
R211
out.
Ro42
can be
of
of
of
fed
the
crystal
harmonics from
the
three-section
the
frequency
is
picked
15
..
0
Mo,
Me.
break
If
connects
is
connected
then
in
..
oscillator
out
range
L65
contact
button
the
operates
the
3-Mo
f;il
range
r.
·range V 15
IX
18.0
to
the
d1
of
S12
located
socket
to
the
as
is
signal.
ters
switch
Me,
second
relay
mixer
RsD
above
to
the
grid
cathode
an.
amplifier
a harmonic
(177 a L78,
..
In
each
..
0
Mo.,
range
range X 21.0
to
the
of
ge~
etc
of
·vr
the
..
)::
R
8741.
116 3
Bl
..
26
The
output
4
diodes
and
transformer
The
output
amplifier
taps
of
to
6.4
Me,
6
..
4
Mo.
In
range
prevent
with
24.4
the
to
section
to
the
4th
mixer
..
of
the
arranged
Tr4.
signal
Ro43
which
179 .and
which
V,
the
beat
notes.
crystal
27.4
Me.
band-pass
mixer,
three-section
in a ring
of
the
feeds
Tr4.
In
ranges
is
later
signal
The
from
mixing
harmonic
This
is
filter,
the
arl"angement
modulator
local
oscillator
it
symmetrically
VI
compared
the
of
15
sent
vi~
which
filter
to
XII;
with
looa~
of
the
Mc.in
the
passes
of
which
is
sent·to
type
circuit
Ro13I
via
this
that
of
oscillator
local
the
range
3rd
only
oscillator
switch
the
is
the
and
is
sent
transformer
oirouit
the
master
is
changed
mixer
results
S1IX and a
frequencies
the
same
3rd
mixer,
connected
via
whfch employs
between
Ro13II
Tr3
to
yields a signal
oscillator,
twice
signal
in
9.4
an·
in
to
output
fixed-tuned,
24.4
to
as
that
of
the
to
the
order
12.4
27.4
179
the
centre
of
3.4
of
Me,
third
3.4
to
to
Me
four-
ll
Lt
•I
I
j
26
t:O-'-::U
t-'
_..
..
0\
\..N--.J
f\)
·...j::::-
~-
~
co
Frequency
I
II
III
IV
v
VI
VII
VIII
IX
X
XI
XIr._
··---.\
Range
.....
Input
0
..
5
1
..
1
2
..
1
3
..
"1
6
.. 1 to
9
..
1
~12
..
1.
15.1
18
.. 1 to
21
..
1
24
..
1
27
.. 1 to
Frequency
1.1
to
to
2
..
1
to
3.1
to
6
..
1
..
9
..
1 l-ie
to
12
..
1
to
15
..
1
to
18
..
1
21
..
1 Me.
to
2 4
..
1
to
27
.. 1 fv1c
.30
..
1
f'.1c
fvlc
Me
He
Me
Nc
Me
l\1e
..
f.1e
IF
0.3
0
.. 3 Me
0
.. 3 Me
0
..
3
3
..
3
3
..
3
3
..
3
3
..
3
3.3
3.3
3
..
3
3
..
3
fv!c
He
Me
Me
Me
J.1e
Me
Me
Me
I•ic
Local
0
..
8
1
..
4
2
..
4
9
..
4
12.,4
15.4.to
18
.. 4 to
21
.. 4 to
24.4
27
.. 4 to
.30
..
4
Oscillator
to
1
..
4 !
to
2.4
to
3.4
-
to
12
..
4
to
15.4
18
..
4
21.4
24
..
4 file
to
27.4
30.4
to
33.4
1
1C
Me
Me
Iv!c
Me
Me
Me
Me
Me
r~e
Crystal
15
21
9
12
15
18
21
24
-
27
Harmonic
-
-
-
-
Ne
~rlc
frle
He
1~1e
Me
Me
File
J.1c
Bridge
24.4
.3~"4
3
..
4
3.4
3.4
3
..
4
3
..
4
3
..
4
3
..
4
Frequency
Master
-
- -
-
-
to
27
..
4
~1c
6
6.4
6
6.
..
6
6
6
6
.. 4 f-.1c
Me
.. 4 l-ie
4
f1c
..
4-Mc
..
4
Me
..
4
Me
..
4
fJie
to
to
to
to
to
to
to
to
3
..
4
3
..
4
3
..
4
3.4
3.
4
3
..
4
3.4
3
..
4
3
..
4
Oscillator
-
-
to
6
..
4
to
6
..
4
to
6.4
to
6
..
4
to
6
..
4
to
6
..
4
to
6
..
4
to
6
..
4
to
6
..
4 Me
Me
Me
Me
Mq
Iv1c
Me
rvie
l•1e
1\)
~
Frequency
\.
table
To
obtain
the.desired
comparison
frequency
of
3.4
to
6~4
Mc,
the
4th
mixer
re-
quires a signal
of
via a four-section
The
comparison
which
Vat
to
The
in
ranges
the·
output
the
three-stage
amplifier
via a capacitor
the
rectifiers
stages
delay
which
cathode
obtained
of
so
the
is
too
resistors,
from
+150 v applied
frequency
VI
of
tuned
to
Gl6 and Gl7, which
that a constant
control
high
the
21.0
Me
filter
to
XII
the
4th
control
circuits
the
anode
voltage.
for
normal
a
positive
voltage
to
it.
..
This
which
(3.4
to
appears
mixer,
amplifier
serve
of
output
In
order
operation,
counteracting
divider
is
also
passes
6.4
at
is
to
the
only
Me)
the
sent
Ro44
correct
3rd
obtained
the
derived
output
via
the
to
Ro46,
stage
the
is a voltage
supplies a control
voltage
is
to
compensate
obtained.
developed
voltage
R25lt
to
R256
from
the
crystal
21·Mc
of
spectrum
from
the
the
3r.d mixer and
range
switches
consisting
frequency
frequency.
local
of
response.
oscillator,
S1IX
·three
doubler
voltage
Diode 015
for
the
across
is
us·ed.
for
grid
the
particularly
This
the
serves
bias
voltage
which.has a regulated
oscillator
in
range
to
S1XI
pentodes.
Connected·
employing
three
to
voltage,
large
is
voltage
The
constant-amplitude
to
the
primary
of
Tr5, Gl8, Gl9, R259,
oscillator.is
the
connecting
in
the
phase
to
synchronize
master
value..
German
If
lator.,
does
responds
used
I
oscillator
oscillator,
(See
edition.)
the
local
the
not
to
exist,
to
drive
winding
applied
point
sensitive
the
~the
simplified
oscillator
·output
the
the
difference
various
frequency
signal!
of
R260,
to
between
bridge.
converted
i.e.
to
signal
of
the
bridge
auxiliary
deviations
of
3
the
phase-sensitive
C638,
the
centre
R259
The
local
correct
circuit
is
bridge
circuit
yields
between
stagElS, which
up
...
4
to 6 ..
4
~c
taken
bridge
C639
..
The
comparison
tap
of•
the
secondary
an~
R260,
output
oscillator
the
local
diagram
synchroni~ed
an
AC
the
two
so
signal
signal
oscillator
of
the
is
a
DC
voltage,
signals
that
with
voltage
make
to
250
kc.
The
from
circuit,
both
of
the
with
AFC
that
the
frequency
..
These
it
local
valve
which
signal
winding
signals
bridge
the
frequ~ncy
circuit
of
..
If
circuit
signal
on
the
synchronization
of
two
conditions
possible
to
oscillator
Ro46
is
consists
from
the
of
~r6
are
compared
of
to
its
page
master
which
catch
is
applied
master
and
is
the
proper
3.
4
of
oscil-
cor-
are
local
then
to
used
R
87lt1
11:6.)
Bl
..
83
brought
·
to
w1
thin
back
;±.0
to
its.proper
cps.
frequency
and
locked
in
with
the
master
oscillator
28
Translations
for
AFC
I
Frequenznachregelung
Circuit
on Page
34
AFC
of
German
circuit
Edition
MHz
:o-Phasenbrlioke
Gleichspannung
Weohselspannu.ng
Steueroszill
..
Fanghilfeverstarker
Begrenzer
Fanghilfsstufan
Steue:rteil
Steuerve:rst.
Quarzoberwellenfilter
fflischstufe
Hauptoszill
Aus~opplung
..
-Verstarker
HF-Teil
Hauptoszillator
Me
Phase-sensitive
DC
bridge
AC
Master
Pull-in
oscillator
amplifier
Limiter
Pt;;Ll-in
Frequency
Control
Crystal
amplifier
control
amplifier
harmonic
Mixer
Lo.c.al
oscillator
Cathode follo-vJer ·
RF
section
Local
oscillator
stages
section
filter
amp~ifier
Nachstimm-Dioden
Steuerleitungsverst.
AFC
diodes
Cathode
follower
R
8741
116
Bl
3
:9
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