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4-3 PA AND FILTER UNITS ADJUSTMENT
IDLING
CURRENT
(For drive
FETs)
(For final
transistors)
SWR
DETECTOR
1
2
• Operating frequency : 12.2350 MHz
• Mode : J3E
• Apply no audio signal to the [MICRO-
PHONE] connector.
• Disconnect J6702.
• Preset R6304 and R6412 on the PA
unit to max. counter clockwise.
• Connect a dummy load or RF power
meter to the [ANT] connector.
• Transmitting
• Transmitting
• Operating frequency : 22.0000 MHz
• Mode : J3E
• Connect the CP7332 (FOR line) on
the FILTER unit to ground.
• Connect an audio generator to the
[MICROPHONE] connector and set
as:
Frequency : 1.5 kHz
• Transmitting
Rear
panel
Rear
panel
FIL-
TER
Connect an ammeter
(10 A) between an
external power supply
and the transceiver.
Connect an RF power
meter to the [ANT]
connector.
Connect a DC volt-
meter to check point,
CP7331.
2.0 A
0.7 A
140 W
Minimum level
PA
Audio
gen-
erator
FIL-
TER
R6304
R6412
Output
level
C7275
ADJUSTMENT ADJUSTMENT CONDITIONS
UNIT LOCATION
VALUE
UNIT ADJUST
MEASUREMENT ADJUSTMENT
• After adjustment, connect J6701 to the PA unit.
1
2
• After adjustment, disconnect CP7332 (FOR line) on the FILTER unit from ground.