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Figure 11: 40-Watt Amplifier with Heatsink / Cover & Transformer Removed
8.5.10 120-Watt Amplifier
The 154-0077 (120W) amplifier option requires two amplifier positions and a minimum line
impedance of 83Ω.
As in the case of the 40-Watt amplifier the output level can be adjusted by way of RV2 on the front of
the 302 5690 card. RV1 And 2 on both boards are factory set and should not be adjusted.
F 2
2A
CN2
O/LOAD
O/P LEVEL
DANGER
HIGH VOLTAGE
L2
TO API 578A FRONT
CN3
TP1
Q7
I-VE
Q9
TP2
I+VE
Q5
Q4
Q3
Q2
F 1
C21
2A
Q6
PWR
LED2
IC9
+
+
+
LED1
IC6
IC1
RV2
API 569 D
120 WATT AMPLIFIER
Figure 12: 120 Watt Amplifier
OVERLOAD
DANGER
ADJ.
+
RV3
+
L1
+
Q18
Q16
+
+
Q15
+
Q11
T1
LED3
TP3
I0V
Q1
IC3
GAIN
ADJ.
IC8
RV1, 2 FACTORY SET
MAN1813-9
HIGH VOLTAGE
TO API 578A BACK
c
a
CN4
CN1
2
4
6
8
IC11
10
12
14
16
18
Q20
IC2
20
22
+
24
IC5
26
IC4
28
+
30
32
+
21
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