Viking 242-2009-632 Service Manual page 227

900 mhz ltr-net 75w-160w repeater
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R664
160
U651B
R667
2904
R663
WO 654
+
470
FORWARD
5k
7
C672
POWER
27pF
SENSE
C664
27pF
R665
R688
10k
10k
C673
.001
C681
R666
.001
10k
10-21
WO 651
RF POWER IN
R651
R654
51
0
.033uH
R655
C671
0
27pF
C668
R659
L653
R662
10k
27pF
.039
10k
R656
U651A
20k
2
2904
1
C669
CR651
B
A
27pF
3
R660
+
10k
C670
27pF
C654
C658
12pF
10k
NOTES:
1. ALL RESISTORS ARE IN OHMS, CAPACITORS IN MICROFARADS AND
INDUCTORS IN MICROHENRYS UNLESS OTHERWISE SPECIFIED.
Part No. 001-2009-600
RF OUT
WO 650
WO 653
CIRCULATOR
50
L651
R653
L652
R668
160
12.5nH
51
L656
.039uH
A
C667
27pF
C653
27pF
+6V
+6V
WO 657A
WO 657B
+ C683
C684
C663
.001
.001
4.7
March 1999
REFLECTIVE
POWER LOAD
R685
L657
50
12.5nH
250W
50
R671
L654
R670
L655
0
.033uH
160
12.5nH
C677
R672
27pF
0
C674
R676
27pF
R677
10k
10k
R673
U652B
20k
6
2904
C675
7
B CR652
27pF
R678
5
+
10k
R681
C676
160
27pF
C658
C675
R680
10k
27pF
5k
R689
10k
C682
.001
+15V
1
8
V OUT
V IN
U653
+ C660
+ C662
R687
LM78L05
4.7
240
2.2
6
2
GND C
GND A
7
3
GND
GND B
+
C661
R686
4.7
470
FORWARD/REVERSE POWER SCHEMATIC
DANGER
BERYLLIUM PRODUCT. INHALATION OF
DUST OR FUMES MAY CAUSE SERIOUS
CHRONIC LUNG DISEASE. SEE MATERIAL
SAFETY SHEETS FOR FURHTER DETAILS.
U652A
R684
2904
3
+
WO 656
470
REFLECTED
C678
7
POWER
27pF
2
SENSE
C665
27pF
R683
10k
C679
.001
R682
7.5k
WO 652
C659
.001
FIGURE10-26

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