Cobra 29 WX NW ST Circuit Diagram

Cobra 29 WX NW ST Manual

Cobra 29 WX NW ST manual content summary:

  • Cobra 29 WX NW ST | Circuit Diagram - Page 1
    • ! 5201-0 . 01 lc) S/RF/SWR METER colf - •8•5 S. - e, = POWER TUNE „ ( ax Sul 124.1 / 0201 02/TX/WX INDICATOR I I _,.. 00 S205-I 01201 0C9 5205-2 WX CONTROL I .3, 3IIC0 o MICROPHONE TITLE: CIRCUIT DI1AGRAM DATE: 4/23/GB MDL OS00 W. CORTLAND ST• CHICAGO. IWNOIS 60707 20 MC ST PART
  • Cobra 29 WX NW ST | Circuit Diagram - Page 2
    RECEIVED VOL OUT (ALARM TONE 0/P) 2 Q SQUELCH 3 0 SYSTEM POWER LINE 5 Q 8+ 13.8V 6 Q Q701 2SB891(Q) 33K 10 -0- R711 10K R719 101( R712 10K WX CONTROL BV 7. cp C713 SE 10u D701 1S2075K ST. CHICAGO. IWNOIS 60707 TITLE: CIRCUIT DIAGRAM DATE: 4/23/08 MDL: . • PART NO./DRAWING NO. PAGE 2
  • 1
  • 2

6
5
4
3
2
RECEJV1ED
6
MAY
1998
KEPC-258
CIRCUIT
DIAGRAM
FOR
COBRA
29WST
NB
AMP
TRI
024
LC1675L
11281
RI
Ct
11
07
/
SL
I
C2
-
"1
rr7
m
TR2
1875L
R2
---12-1M
010
12
2:
0
,
1
,;
(
,,.
z!
1
-2 !
i!
103
r'
T
:
4
;1
-
,
y
1
1X4146
I
G
?,
--C11
-
74
-
r
-
!
I
I
I
!
'
/77/77r77
/77i
//i1/
/77
R2
M.20
5.51
04-6—C
oi
103
0.
LC9430
03
10K
/77
TIN
Itt
2.2Y
LA7331
7
CS
200P/SL
0.
C7
01
I
17
C4
RI
471
05
10K
1ST
WIRER
PT
ARP,
FET1
TR7
L3
25019247
1.010741.
H
Cu
its
ITA
;
5
1
-
0)7
rri
/74
IOK
015
100
2001/01
m
16
1130V/01
IRS
l09450
RS
1001
m
/77
m
rt7
L4
15
Ir
R1.61651152
771
ill
I
_
-'!
L7
V,
11
01
L
-0-I
-
S.
I
_
017
Ln
£
.330
- 7
L6
I
-r-
240
MIXER
FET2
2SK192AY
021
4.71(
L7
019
00
,
/ ,
0
5203-1
Le
;
111
5
ANL
OFF
4
55.z;
AMP.1
022
-
v
PLO
10
IF
_AM
DETECTOR
-
------------
9
-
DI
TOO
1.0187k
/
04
11344
De
038
R37
023
2.20
0.
2
5/1
m
R24
1K
I
'
L01675L
VR1
<
3000
I,
I
1
521(
F,
5
1-
1
L
;r-ra.
,
031
'
AN
I
F.
;
$
rAMI
' /-
7
-
7
/7
7
R32
C27
0.10
/77
026
0.039/P
034
55
11201
05
I
I
E
3
T
402
10251
y
B
850
Da
0180
111
01
047
10K
2.21
CIS
0.
047/P
.L
'1-
R20
8501/SL
04
m
m
m
0
1'
0141
C
TR6
0.
1
lC9430
I
I"
23V
010
m
/77
.3
402
21
/77M
055
47P/51.
I
LII
I`
JR741DO
00206
CC
0KB
5201-0
T
rI
K
1
118
lit
:•!_••
I
n
TV
ROWER
COO
;
TRIO
220
CS2
/SL
2=19570
0
D047/10
2502078E
I
R123
I
I
L13
L15
:
C30
1001/51:
O..
pita
-0
-
CBI
I
0.039
IT
Ta!
,
3.;
m
/4-7
m
m
rti
771.17
058
8.2
0UPFEP
T
"
I
250041140
LI
Lei
"I
I
ti
7
1263
T:
I
17
1
0.01
2.20
11
3R
m177
/
-
7
I-
7/47
/47
-
C25
I
0.031/1
TRIO
COP
046
47
-1
.W
5203-2
0_
NE/ANL
ANL
OFF
1236
8211
1520750
031
020
0.001/1
6125
3.10
0147
C30
I
0.031
/r
,
0201
/
-
77
m
m
044
3912
SOUELCH
LCTONT
443
IC
-LeN42
3SK
TRI1
1012
LC9450
I
1.01430
m
VU
MOKB
t.
L
C32
S
e
a39
0.0221)F
661
R40
C32
151
5
.1
00
REVISION
RECORD
UPDATE
TO
ECN
NO.
APPROVED:
DATE:
ECN-29WST-673
2201
M"
0503
0801
101E
0642
470
LC0451
1
0.lui
m
EXP
IN
COP
Out
VOL
IN
(AUDIO)
Qi
SQUELCH
(LOW
LEVEL)
SQUELCH
VR102-8
5018
0804
I
0803
C502
10uF
lOuF
10oF
155
150
1
51
T
.-
1,7
r-.
1
160
!
'I
.
I
-
IC801
TA31101AP
A
I
can
3920P
051
250
/77 /77m
rft
/77
.
01
lc)
S/RF/SWR
METER
5.27
-
15.71
MHZ
TX
MIXER
1000
096
0.039/ZF
890
I
LIOC
I
t
-I
-C1/7
:
I
72,
!°-:_L
IC2
ST
ST
I
nt
OK
l-
t2
c
oV/11
095
062
A
2;2
.
0.022P
B2P/RH_
e,
=
colf
-
85
••
-
I
L22
-
4'.
S
.
-
-
TA7310P
m
2,
2
t
002
5.00
glo2
oss
1000
-
F
-
0.01
mm
004
151
2
/S1
MTH
C3
0105
el
TA73101
391/SL
I
11811
I
Dj_
0506
6500P
1
'
/77
ICI
coos
SI
,0
0061
cool
r
2,24F
11
60
1
uv
5
,
r.
)
.7
L20
1102
3.24
,
I
0
2!
0
DI
I
ICI
UP20101
e
1
C94
8P/SL
I
I
C100
.
51
/ 2.
!
I-4
!
"
51/SL
1
;
1
0101
n
n
Fr!
I
I
,
I
eel
r
o.ous
7
-
1
/77
M
/47 /77
TsTsT..T,
-
..T.T.T.,
iE
IG
.E
la
S
IS
IS IS
I
M 4
-
7
m
0.030/IF52
CLOW
031
14
01414814
032
033
A
IIEI
TY
TY
n
I
7
!E
1
5
1
1
5
1
5
`'
??‘)!`?
CHI9
a
;
I
I
I I
j
g07.304
1301-030E22013)
'CO
5301
ROTAL
I
.
0401
CHAVIEL
SWITCH
0307-03021
y
0.3011-313.312
I
IS2073125
320.4
;
0
I
I
0315
150
1/Ow
84
414644
;
0315
1
6
0317
2
,.
KEPC-257
w
4.507
220
MI
220
014
036
15207512
I
02073K
C127
-
101
2
/C-1
I
-
I '
1
-
‘1
LL7
L23
0207-2
0_
10.24mHZ
015
0207.51
PO1
1000
LC1675L
s
044
-
C1011
150
--
0.01
!
0110
015
a
01
56
C101
0.01
Rat
_L
-7
cut
001
---
-r-
/77
COMP
OUT
COMPANDER
"
°5
:cS
)
,L,L
51/01
X
F
-0
--07
0—.----9—.—.0
VOL
OUT
(AUDIO)
,,
I
I
0806
050
1
LED
rh
330
01107
,
100
m
01114
COMP
IN
1000uF
05.09
I
CA
F
160
ON
0802
4141
6!A108
100
0513
0.22a
255
)
4
2:4
10
04
6
56
022
c
„,
A
••
C114
=
0115
i,
7
v
°
I
M
0.0
/ ,
III5C2
0.030/Zt
I
uv
/-7-7
/77
m
m
/77
7117
10145-0
00450
'far
CAD
0.0022/P
I
RAS
IC4
TA7222AP
III
c
1
e
A
1;
4'
31a,
2?
_L.
2
16V
I
T
037
Ovv
0.033/P
046
2206
MIO
AMP
440
CONTROL
MODULATION
ALIGNMENT
ae
q
ogi_! 04
61
/P
C45
;
;
/
47
;
-]
s
4
,
I
ei
5010
411202-A
8221
VK
0204
0.001
s
VOLUME
!--!
0
,
C48
470
1110
7
!
;10471
TI
DgT
I
0.01
21-2
/77
e
'
I
r+7
m
OS
044145
ISO
5.5K
!
043
0.001/P
t
0511
Lo
!
0.001
0.1/A
Ill
,
055
067
5.81
33
I
y
z
r
'
I
Los
'T
-47
2
.
71
I
I
/77'M
/77/77
070
330
TRIO
LA733P
071
1.2K
0122
311
075
I
0.01
B
p
g t
851
32
14
0
S202-1
il/H
T
it
!
,_
;
;.
2
X
II
T
6
:
1
K
=m
'
g2
I
I
O,
OD_
,
\
yL,-„
?
,,
/
!
6
-_-
C)
I
1
0
.
1"
t
I
13
F1146
5KA
/77 /7
;
7
/77
/77
--f
71
011
13207511
7
50V
C71
___,C72
0.2
877
f - •
040
- 7
Tig
223.3/T
5.61
2
.
20
0577
2
,
r
0
,:j
0.01
I
I
I
0216
m
m
M
r/7
/77
/
77
.
0.00IUF
CP7S
7
AL
05CILLA
,
ON
XI
10.244
LOS
1.24
1
—‘
I
-4
1
--1
H!
J
3
C:30
L124'
r'
E
-T
1—+
I
s
2200/2
i
0
I
it
..
'I
oI
g.
!
r
1DP/RH
,
.
!
F.
i!
I
!
/77m
M
M
/77M
m
004
4.7K
015
620756
'
R1Y
1
A'
.7K
m
COS
1
1621
47
LA73
11
64
^
021
020750
00
0103
200
2W
'
I
TX
SWITCH
RIDO
2.71
C117
0118
470E
1
0.01
18V
020
15207311
fi
302541
20K
DELTA
TUNE
12117
R101*
2.2
TRI3
I
0.111
1
I
ICID880AY
0.01
I
I
0105
520
1
-.-
CM
7
ISO
=,
._
,
X022
01
0
4
.
I
,
11
60
,
7
,
11x901
10
16
r
!
:
C120
0
CI
/77
LL:
03
„C.'
.
TX
CONTROL
5201
iPOWER
T2
TR22
62-
77
7
1
—!!!..\
0.1
25512570
2115
I
I
L
o
:
F201
2A
.'H
0.01
413
I
66
7
o23I
o
00
15.10
,
I
IN4°Q
1
L-"
A
C2I21
-
TO
202
I
I
I
I
I
'
I
!
I
Sul
(
ax
124.1
/
01201
0201
02/TX/WX
INDICATOR
_,..
00
S205
-I
L201
5205-2
0
C9
I
.3,
3IIC0
o
MICROPHONE
WX
CONTROL
NOTES:
I.
RESISTANCE
v•LUES
ARE
SuOwN
N
ONWS
UNLESS
OTNERYASE
NOTED.
14:10
.
1
OHMS
OHMS)
2.
RESISTOR
WATTAGES
ARE
TAW
UNLESS
OTHERWISE
SPECIFIED.
I.
CAPACITANCE
VALUES
ARE
INENCATED
iN
WICROPAR•DS
UNLESS
OTHERWISE
NOTED
:uICROuuTCRD
PAR•0.)
A.
ALL
CAPACITORS
TEMPERATURE
CHARACTERISTICS
ARE
yr
uNLESS
OTNGw6E
00100.
5.
CAAaolTAAo5
v•ToC
OF
(131
IS
TACT:DIN
ADAATED
rola
AP
To
107
5
04
-
13.8V
CD
SYSTEM
POWER
LINE
OS00 W.
CORTLAND
ST
CHICAGO.
IWNOIS
60707
TITLE:
CIRCUIT
DI1AGRAM
DATE:
4/23/GB
MDL
20
MC
ST
PART
NO./DRAWING
NO.
PAGE
1
OF
2