Sony CRF-230B - Frequency Coverage and Tracking Adjustment; Frequency Coverage; And Tracking Adjustment; Tracking Adjustment

-RF-230B
3-7. LW/MW/SW1 FREQUENCY COVERAGE AND TRACKING ADJUSTMENT
Preparation: rf signal loop antenna EXT SP VTVM
Rf Signal Generator Coupling: generator ;
Loop antenna 7y.\ se eee
Rf Signal Modulation: 5 CRF-230B
1-kHz 30% amplitude-modulated signal
VTVM Connection: _ me
To EXT SP jack in parallel with 49 load Buia
resistor Fig. 3-12 LW/MW/SW1 frequency coverage and
tracking adjustment setup
Adjusting
Item
LW
Frequency
Coverage
LW
Tracking
MW
Frequency
Coverage
MW
Tracking
Rf Signal
Generator
Frequency
145 kHz
410 kHz
160 kHz
520 kHz
1,680 kHz
620 kHz
Receiver
Tuning Knob
Setting
Fully
counterclockwise
LW osc coil
L409
Fully
clockwise
LW osc trimmer
CT409
Tune to
160 kHz
signal
Tune to
360 kHz
signal
Fully
counterclockwise
LW ant coil
L403,
LW rf coil
L406
LW ant trimmer
CT403,
LW rf trimmer
CT406
MW osc coil
L408
Fully
clockwise
Tune to
620 kHz
signal
MW osc trimmer
CT408
MW ant coil
L402,
MW gf coil
L405
1,400 kHz
Tune to
1,400 kHz
signal
1,550 kHz
Fully
counterclockwise
MW ant trimmer
CT402,
MW tf trimmer
CT405
SWI osc coil
1407
4,600 kHz ie
Fully
clockwise
swt
Tracking
1,800 kHz
Tune to
1,800 kHz
signal
SW1 osc trimmer
CT407
SW1 ant coil
L401,
SW1 rf coil
L404
4,200 kHz
Tune to
4,200 kHz
signal
SW1 rf trimmer
CT404
Band Selector: LW
Adjust for maximum
meter reading on
VTVM.
Band Selector: MW
Adjust for maximum
meter reading on
VTVM.
Band Selector: SW1
Adjust for maximum
meter reading on
VTVM.