Viking 242-2009-632 - Manual (Page 223)

March 1999
Part No. 001-2009-600 10-17
75W POWER AMPLIFIER SCHEMATIC
FIGURE 10-22
WO 505
POWER
CONTROL
C508
56pF
EP501
C509
27pF
+ C510
1
EP502
+ C505
1
C507
56pF C506
.018
C504
.018
+ C503
.1
VS1
RF IN
1
2 3
4
R502
12
C501
27pF
WO 511
RF INPUT
50
U501
MHW806
AMPLIFIER/PRE-DRIVER
VS2
RF OUT
+ C513
1
C511
56pF
C514
.018
EP504
+ C516
1 C515
56pF C517
.018
EP503
C518
56pF
+15V
50
EP505
C523
12pF
C524
12pF
DRIVER
Q501
4821
C525
22pF C526
22pF
EP509
EP507
+ C531
6.8
C529
.01
C530
.001
C528
.018
EP508
C527
56pF
+26V
+ C534
6.8
C535
.018
C537
1.5-5pF
R504
100
20W
R509
100
100W
WO513
TO LPF
R506
200
C569
39pF
R512
100
CR502
C570
.018
R513
1k FINAL 1
Q502
4820
+ C545
6.8
C544
.018
C546
.001
EP512
C547
56pF C548
.018
+ C549
6.8
C550
56pF
+26V
FINAL 2
Q503
4820
C560
.001
EP516
C561
56pF
C562
.018
+ C563
6.8
EP517
C564
56pF
+26V
FINALS
+28V
WO 501
+28V
WO 502
WO 502A
WO 503
WO 504
+15V
WO 512
+15V
+26V
+15V
EP518
C575
56pF + C576
1
8
GND A GND B GNDC GND
2 3 6 7
R523
56
+ C580
4.7
R537
240
+ C577
4.7
1
V OUT
U504
78L05 V IN
+6.2V
SOURCE
C578
.018
C579
.001
C581
.018
8
7
6
5
V
IN
NC 7
NC 6
NC 5
U503
LM35D
NC 2
NC 3
GND
V
OUT
2
3
4
1
C583
39pF
+
U502A
2904 3
2
1
R526
301k
C584
.001
R525
100k
R527
470
C585
.018
WO 509
TEMP SENSOR
NOTES:
1. ALL RESISTORS ARE IN OHMS AND ALL CAPACITORS IN MICROFARADS
UNLESS OTHERWISE SPECIFIED.
L501
2
2
2
2
2
RF LOAD
2 DANGER BERYLLIUM PRODUCT.
INHALATION OF DUST OR FUMES MAY CAUSE SERIOUS
CHRONIC LUNG DISEASE.
SEE MATERIAL SAFETY DATA SHEETS FOR FURTHER DETAILS.
C502
1
C511
56pF
SPLITTER
70.7 OHMS
1/4 WAVE
C586
5.1pF
R508
200
R515
3.4k
R514
1k
FINAL POWER 1
WO 510
FINAL POWER 2
C572
39pF
CR503
C573
.018
R520
1k
C574
.018
R521
3.4k
R517
100
R516
200
R519
1k
R518
100
R513
200
WO 508
R524
75
R501
820
R528
12
R503
820
1 dB PAD
50
C588
1.5pF
50
EP520
EP506
C532
27pF
C536
3.9pF
C589
1.5pF
C538
15pF
50
RF DRIVER OUTPUT MONITOR
50
R504
110
L502
.01uH
C519
10pF
L503
.01uH
CR501
R505
1k
C520
.001
R506
200
C521
.001
R507
2k
WO 521
RF DRVIER
POWER
C540
6.2pF
C542
56pF EP510
4
EP513
C543
56pF
100
B
A
C571
.018
RF 2
WO516A
4
RF LOAD
+ C559
6.8
C558
.018
C587
5.1pF
C557
56pF
EP515
EP511
C567
56pF
C553
56pF
B A
C554
6.2pF
C556
56pF
EP514
4
+ C582
1