Cobra 29 WX NW ST Circuit Diagram - Page 2

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RF AMPLIFIER MIXER IF AMPLIFIER DESCRIMINATOR RECEIVED 6 MAY 1998 REVISION RECORD 4.8V R605 15K C624 10U R6104-.7K R611 220 L608 100UH R614 TO 8+ 13.8V C603 4PF Q601 9018 0.3V R620 10 OM) Q606 co • L601 LC1674L 154-1(Y 9 )R604470K Co•1-1c2o. 0 c-) Ts R609 43K D603 /7-7 i-TT Q604 LC945Q Q605 LC945Q 1.25V R612 4.7K 470 1/2W D607 1N4148 i ) TO 6 -0 TO 4 0 f77 m m R618 47ohm D602 152473 1.0V 3.6V c>o = R602 Pei - 820K 10 C605 - 0.022 /77/77 r/7 C625 C604 0.001(AX) 0.001(AX) Q602 LC1674L C607 62P N330 1.8V R617 CC' 10 o•• (Oa co c.4 t . co c-4 o O f77 CO 060 R606 220K 4.6V 1S2473- L602 P' .) 0.6V 510pf C627 149 `4? 180P I • T C623 C613 0.047 0.022 .63V C615 360P NAAr----6----1 R613 120K i C617 0.001(M) C618 4, 510•Df sDB600515 0 I IL :+ L L604 151 /77 m m m mm in C6I 19 D606 SB0015 Q603 C6 4 LC945Q 10u • 001 in 240P C620 0.022(M) 0 in R616 10K C609 R608 CT605 T47P NPO 1.7V 11V 470 CT604 20P CH7 C628 22PF - 1, L603 0.17uH FM 97.7(MHz) REJECTION C608 L R607 56P N750 - 1K /77 LOCAL OSC. C610 _ 0.001 in z C611 0.047 11/D604 /775.5V C612 470u 16V 60P X601 16.206 III L605 CT606 30P C621 100P C622 CT607 411 -0 60P 4 CT602 3 60P 2 •G 152 47P ANT 10 ANT INPUT FREQ.:162.400 - 162.550(MHz) CT601 60P UPDATE TO ECN NO. ECN-29WST-673 SW601 0 APPROVED: DATE: r VOL IN (NORMAL AUDIO 0/P) 1 VOL OUT (ALARM TONE 0/P) 2 Q SQUELCH 3 0 SYSTEM POWER LINE 5 Q 8+ 13.8V 6 Q Q701 2SB891(Q) R702 BEAT NOTE CONTROL USE CB25WX ONLY 99 TX CONTROL 4 0 8c R701 330 150K 1/2W 001 D704 1N4148 Q702 IL945 (Q) C709 470U R703 1K C716 0 001/B 705 15K C711 0.1 R716 100K D708 R7118N4148 C304 100K 0.01m Q705 IL945 (0) C701 R704 100uF 47K C702 1u Q703 IL945 (0) R707 - 100K C703 0.001 177 R708 Q704 IL945Q in 100K C704 0.001 R710 33K 10 -0- R711 10K R719 101( R712 10K WX CONTROL BV 7. cp C713 SE 10u D701 1S2075K C705 33uF 1050Hz TONE DECODER DELAY TIME 0.5S ON C706 El 4.7uF in C708 0 rO•-• -2 5 0.01 (M) 23mA R715 - D705 Fc.:) CD.4 5.6V C•4 10K /77 m0. in oy 0703 1S2075K %6 IL945 (0) y D702 CcoD 152075K R714561( VR701 R721 'VV', 68K 1N4148 1101 D706 o LO is. O U in COMPANY: 1) ALL RESISTOR ARE 1/8W EXCEPT SPECIFIED 2) C717 IS 4.7u DELAY TIME 0.8S 3) C717 IS 3.3u DELAY TIME 0.5S 0500 W. CORTLAND ST. CHICAGO. IWNOIS 60707 TITLE: CIRCUIT DIAGRAM DATE: 4/23/08 MDL: . • PART NO./DRAWING NO. PAGE 2 OF 2

  • 1
  • 2
RECEIVED
6
MAY
1998
RF
AMPLIFIER
MIXER
IF
AMPLIFIER
DESCRIMINATOR
C603
4PF
Q601
9018
4.8V
R605
15K
M)
O
R620
co
•
Q606
L601
LC1674L
0.3V
10
154-1
(Y
9
)R604470K
0
R618
47ohm
D602
152473
f77
m
m
C628
-
1,
L603
0.17uH
FM
97.7(MHz)
REJECTION
22PF
1.0V
3.6V
R602
—
820K
>
=
co
Pei
10
C605
—
0.022
/77/77
r/7
C625
C604
0.001(AX)
0.001(AX)
Q602
LC1674L
R617
(Oa
CC'
10
o••
t
.
co
co
c.4
o
f77
R606
220K
C607
62P
N330
1.7V
1.8V
c-4
CO
O
0
60
C624
10U
C•1
12.
Ts
o
—
co
R6104
-.7K
R611
220
L608
100UH
R609
0
c-
)
43K
D603
/7-7
i-TT
1S2473-
L602
P'
.)
149
`
4
?
180P
I
•
T
C613
0.022
/77
4.6V
C609
11V
T47P
NPO
C608
L
R607
56P
N750
-
1K
LOCAL
OSC.
/77
C623
0.047
C610
_
0.001
in
Q604
LC945Q
.63V
Q605
LC945Q
1.25V
m
m
m
mm
in
Q603
C6
4
LC945Q
10u
R608
470
z
C611
11/
D604
0.047
/775.5V
C612
470u
16V
0.6V
C615
360P
0.001(M)
NAAr----6----1
I
I
L
:+
R613
L
120K
L604
151
C
I
6
19
•
240P
in
X601
16.206
ANT
ANT
INPUT
FREQ.:162.400
-
162.550(MHz)
BEAT
NOTE
CONTROL
USE
CB25WX
ONLY
r
10
1
2
Q
3
0
5
Q
6
Q
99
TX
CONTROL
4
0
8c
WX
CONTROL
7.
cp
BV
VOL
IN
(NORMAL
AUDIO
0/P)
C716
0
001/B
VOL
OUT
(ALARM
TONE
0/P)
SQUELCH
SYSTEM
POWER
LINE
8+
13.8V
R701
330
0
0
1
D704
1N4148
Q701
2SB891(Q)
R702
150K
1/2W
C713
SE
10u
Q702
IL945
(Q)
C709
470U
R703
1K
C711
0.1
•G
-0-
10
III
R612
4.7K
R614
TO
8+
13.8V
470
1/2W
D607
1N4148
510pf
C627
C618
510Df
C617
4,
•
L605
i
sDB60051
0
5
D606
SB0015
0
0
1
C620
0.022(M)
0
in
R616
10K
i)
TO
6
-0
TO
4
REVISION
RECORD
UPDATE
TO
ECN
NO.
APPROVED:
DATE:
ECN-29WST-673
CT605
CH7
CT604
20P
60P
CT607
411 -0
CT606
60P
30P
CT602
C621
60P
100P
C622
152
47P
CT601
60P
705
15K
R716
100K
D708
R71
1
8
N
4
4148
C304
100K
0.01
m
C702
1u
Q703
IL945
(0)
R719
101(
R707
-
100K
C703
0.001
177
R708
100K
Q704
IL945Q
C704
0.001
in
C701
100uF
D701
1S2075K
Q705
IL945
(0)
R704
47K
R710
33K
R711
10K
R712
10K
4.7uF
in
C708
0.01
(M)
C705
33uF
C706
El
1050Hz
TONE
DECODER
DELAY
TIME
0.5S
ON
-
D705
c.
F.:
.)
C.
D
4
5.6V
C•4
/77
m0.
oy
0703
1S2075K
0
O
r•-•
-2
1N4148
11
0
1
D706
R714-
%6
23mA
R715
10K
5
561(
VR701
in
IL945
(0)
D702
y
152075K
co
CD
R721
'VV‘,
68K
o
LO
is.
O
in
U
4
3
2
0
SW601
COMPANY:
1)
ALL
RESISTOR
ARE
1/8W
EXCEPT
SPECIFIED
2)
C717
IS
4.7u
DELAY
TIME
0.8S
3)
C717
IS
3.3u
DELAY
TIME
0.5S
TITLE:
CIRCUIT
DIAGRAM
DATE:
4/23
/
08
MDL:
.
•
PART
NO./DRAWING
NO.
PAGE
2
OF
2
0500
W.
CORTLAND
ST.
CHICAGO.
IWNOIS
60707