RCA CR-91 Instructions Manual
-
,
•
~
:::
,
!!
•
CENERCAL PURPOSE
COMMUNICATIONS
RECEIVER
MODEL
CR-91
INSTRUCTIONS
RCA
VICTOR
DIVISION
OF
RADIO
<'ORPORATIOH
OF
AMERICA
Camden. N. J
..
U.
S.
A.
GENERAL PURPOSE COMMUNICATIONS
RECEIVER
MODEL
CR-91
TECHNICAL
SUMMARY
Electricel
Characterist
ics
Frequency
Range-tou!
6 bands .........................
... ........
. . .... . . . •. . . .
Band 1
....
. . .
...........
.
.... · ....
. ·
··
...• ···
···•··.·•·
· · · ·····•· · ····
·· ··
Band 2
......
. . . . .
........ ~ ..
. . . .
....
. •...
.........
.. .......•.
....
•. .... .
...
Ba
nd
3 . .
...
.. .. " .. , ...• , .....•.....• ' ..•
• . . • . . .... .
•..
• . • . •
...
• . ' . ' .
....
.
Band 4 . ....
..................
.
......
. . .
..........
.
...
• . •... . • . . • . . . . .
....
.
Ba
nd S
........................................ ,··
.... ·· ... •
.. .....
........
Band 6 ..... ...
....
.. ..
....
. .....
. .
.. ..
....
... ...... • . . . . . .
...•..... ..
....
.
Maximum
Undistoned Output-approxim
ate-2.5
watts
Out
put
Impedance-2
.5
ohm
s and 600 ohm
s.
Power
Supply Requiremenb
7l
to :;0,500 kc
73 to 205 KC
195 to
55
0 kc
1,480 to 4,4
00
kc
4,250 to 12,150 kc
11
,900 t o 19,5 00 kc
19,0
00
to
:iO
,500 kc
Line
Rating ........ ..
. .
.. ..
. ........
. 100·r17, 117·135
,135·165, 190·23
0,2
00·260
vo
lts, 50/ 60 cycle s
.or &tte
rie,s
. .
....
...
......................
......
6 volt "A" battery and 250
[0
l
OO
volt
"B" batt
ery.
or
Vibrat
or
Power
Suppl y
Un
it .
...
........
. .....
. . MI·8319.
Power Cons
um
pti
on- l 00
watt
s.
Tube
Complement
R·P a
nd
I-F A mp
lifiers . ...........
•..
....
. . . . . . . .
........
. .•......
. .
....
.. ..
1st
Dete
ctor (converte
r)
........•
. • . ...•..
• . . .... •... •• . • .
...
• . . . .
...
.......
Oscillator . . .
... " ..
. . , . .... ,
•.
, . . • .
.. ,., ... . .... ..•. . ..•. . , . • . • •......•
. . ,
2nd Dete
cto
r· ...... ..
. .......•..
.. ..
•..•.
. . . • ..•.•.........•....•
. .... . • . ·
..
N
·
L'
.
Olse: Imltu
. . . . . . .
.........••
. .
•••
• . • • • • • • • · ..• ••.• . . · ••• .
····
• .•..•
· •
··.
A·p
Ampli
fier
.....
...
, . .
.. ..
• . .•.•
...
. • . . . . • , . . , •.• . • • . • . .•.• . . • •
..•..• .
..
Power Amplifier .......
.. ..
. ....
.. ..
.•..
. . •
....
. . ..•...
. •....•... . . ,
...... .
Beat
Freq
uency
Osc
illator . .
.....•..
. . • ...• . . ,
...
..•
....•.......
. . .... . • .
....
Rectiner
..........
.
.........•.
, •. . , '
•..
. . •. . . , ..•..
.••
...... , ...
•...••.
, . . .
Voltage Regulator
....
.. ..
. .... • . • . .
.. .....
..
, ...................
. . .
...... . .
MeCMnicel
Spe.cific:ations
5 RCA·6SG7
1
RCA
-6SA7
1 RCA.6J5
1
RCA·6H6
1 RC
A·
6H6
1
RCA·6S
]7
1
RCA
6V6GT IG
1 RCA·6J5
1 RCA·5Y3GT/ G
1
RCA-VR·15
0
Ov
erall
Dime
nsi
ons
................
..
..........
. 19l,4 inc
hes
wide x
11
inches
high
x 19
1
/
..
inc
hes dee
p
TABLE
I -
PERFORMANCE
DATA
(Appr
oximate
Values--Taken
on
Sample
Recei
ver)
Sens
itivity
Anten
na
Input
in
Ant
enna
Inpu
t in
Band
in Microvolts M ic
rov
olts for :20
DB
Microvolts f
or
20
DB
Image
N
o.
Me:gacycJes
for
0.5 waU
Signal·N oi
r.e
Ratio
Signal· Noire Ratio
Ra
tio
1 .077
.5
1.8
10.0
.1
40
.5
1.
8
10.0
Great
e:r th
an
.190
.5
1.8
10.0
1,000,000
2 .205
.6
1.0
7.0
,375
••
1.
0
8.0
G reater than
.5
00
••
1.5
10.0
1,000,000
3
•
I.
• .5
1.5
11.0 1,000,0
00
3.0
.7 1.3
10.0
4.0
.5
1.3
10.0 25,
000
,
4.5
••
2.0
12.0 500,000
1
1.
0
••
1.5
10.0
9,000
5 12.4 1.0 2.0
n.o 15,000
19.0
.5
2.0
12.0
3,5
00
6
20.0
2.0
2.0
11.0
3,5
00
30.0
1.
0 2.0
13
,0
600
•
.
.
I-F
reje
ctIOn
at
1600
kc IS
800.
000
.
4
.
•
VI
INST
ALLA
TION
Power
Supply
. T he
power
supply circuit
is in-
tegral
with
tht
: receiver.
Determine
line voltage
and
fr"yuency
and
check
with
the
rattng
of
the
receiver.
The
po\ver
transforrncr
prilnary
T1lity
he
connected
for
anyone
of five volt;lge
ran
ges by mea
ns
of
Cl
L1.
p
switch.
This
switch is
lo,·
~t e
d
in
the
rear
apron
of
the
r
ecei\'e
r~
and
the
voltage for \vhich it
is
set may he
read
directly
un
the
.switch.
For
Battery
or
other
Supply
Operation -For
con-
nections sec Sl'hc.malic Diagram
figure
11.
It
is
only
neccss,lry to re
move
the
plug
fro
m
th(
~
socket
on
the
rc
;.tr
of
the
n.::
-:.,;'ivcr. ,mu
conne
ct
the batteries
to
the
prop
er
tl~rrninid.
s
as indicilted hy
thl~
schema
tic
dia
~
gr'\n1.
A.
hattcry cahle
terminating
in
an
o::tal
mal
e
pl
ug
IS
Il
ccc5s
ary
for
thi
5
purpose
. A
vlbr;ltu
r
po\v
cr
sup
ply MI-
S:;
I 9
i.
available which will
opera te
the
re
ceiver uircctly from a 6
vD
lt storage
hattery.
For
inforl11,lti
Ol1
011
this
110\v
cr
unit
SI;'~C
Section
XI.
Tubes
Insp
ect the chas.,.;s
before
applying
power
tu
see
that
all
tuhes
arc
firmly seated in
their
respec·
tive sockets.
Antenna
.. The
input
Impedance
at
the
ant
enna
terminals
is desi.gned
to
match a 200
ohm
transml
s"
sion.
line
or a st
raigllt
wire capaLity
t~
:pc
antenna.
For
gl,;~neral
use
it
is
recnmmcnut
:d th
at
a s
traight
\""1[
('
an
tenna
hetween
25 and
50
fec
t long he used
for
hands:'
to
6
inLlu.sive~
an d a
WI
fe
of
200
fCt~
t
or
more
for
hand:; 1 and
2.
Speaker -Terminal
s for
connection of a loud-
speaker
are
indicated
in
Figur
es
'2
and
6. The output
transformer
is
designed
to
mat
ch a
speaker
having
7.5
ohms
ilnpedanc
e.
Headphone
.,
A jack is
proviueu
on the l
eft
of
the
front
panel for plugging in a pair
of
headphones.
T
here
a re
l\VLl
posit
ions
of
the plug.
1.
Half
way
in
-,--for r c:ct':pt io
ll
on
hnth
speah::r
and
phones. .
2.
F\llIy in
ior
phone
rece
pti
on onl
y.
See
"CIRCUIT
ARRANGEMENT"
"Output
Tub
e. "
MO\lnting _.-
The instrument
may be placeu on a
tahle
or mounted
on
a r
al.".k.
For
rack mouncing loos
en
the
p;tncl
mounting
scr(~\
\'s
anJ remove
the
panel
and
ch
assis cn
mpletc from
the
cabinet. The:
panel
is
cquippe
J.
with
slilll
c.larcl
sl()ts
for
rack
mounting.
VII
OPERATION
Pigurc 3 illustrates t
he
dials anJ
control knohs.
TUNING
TONE
TRIINS
.
OFF "
ANT.
....
BFO
3
~-'.
(
(
,
,
~~
4
, ,
)
)
-
POWER
TRANS.
~
RANGE
RECEIVE
PHONES
- 5
VERNIER
TUNING
LOCK
4
R.F.GAIN
AoUDIO
GAoIN
SELECTIVITY
Figure 3 Diagram
of
Fron' Pallel
8
NOISE LIMITER
BFO
MAN.N.L.
I
MAN
.,
I
A.V.C. N.L..
A.V.
c.
NOISE LIMITER
AND
AV.C.
R-879E
Loading...