President George CB-Radio

ALIGNMENT PROCEDURE

TRANSMITTER PORTION


Test equipment required:
Power Supply: 13,2 VDC Current MeterOscilloscopeRF Power meter
RF VTVMAF OscillatorFM Linear DetectorDummy Load (50 ohm)
AF VTVM

Preparation alignment:
VR208Clockwise
VR205 and VR 206Middle position
VR207, VR201, VR202, and VR 203Counterclockwise
Mic gainClockwise
Meter SWRF
SWR/CAL VolumeMiddle position
RF PowerClockwise
Test frequency27.185 MHz

StepConditionAdjustmentProcedure
1LSB 27.185 MHz
No Mod.		VR203Remove the PB201
Connect a DC current meter to TP202 (+) and TP203 (-)
Adjust for 330 mA
2Same as Step 1VR201Connect a DC current meter to TP202 (+) and TP201 (-)
Adjust for 85 mA
3Same as Step 1VR202Connect a DC current meter to TP202 (+) and TP201 (-)
Adjust for 170 mA
4LSB 27.185 MHz
Two-Tone
400 Hz and 2.500 Hz
1 mV Mod.		L221Re-install the PB201
Adjust for maximum on the RF VTVM
Set the AF-oscillator, so that the output is less than 32 V
5LSB 27.185 MHz
Two-Tone
400 Hz and 2.500 Hz
30 mV Mod.		VR208Adjust for 25 V on the RF VTVM
6SSB 27.185 MHz
No Mod.		VR209Adjust the carrier leakade at LSB and USB become minimum and almost equal
7AM 27.185 MHz
No Mod.		VR205Adjust for 3.9 Watt on the WattMeter
8AM 27.185 MHz
No Mod.		VR204Adjust for RF Meter at "9" just light on
9AM 27.185 MHz
1 kHz 30 mV Mod.		VR207Adjust 90% negative
10AM 27.185 MHz
1 kHz 3 mV Mod.		VR213Adjust for Modulation Meter at "9" just light on
11FM 27.185 MHz
No Mod.		VR206Adjust for 3,9 Watt on the WattMeter
12FM 27.185 MHz
1 kHz 30 mV Mod.		VR212Adjust for +/- 1.9 kHz Deviation

ONLY FOR "INTERNATIONAL" CONFIGURATION WITH 30 WATT IN INTERNATIONAL MODE AND 4 WATT IN CEPT MODE
StepConditionAdjustmentProcedure
11AM 27.185 MHz
No Mod.		VR205Adjust for 30 Watt on the WattMeter
11FM 27.185 MHz
No Mod.		VR206Adjust for 30 Watt on the WattMeter
11AM 27.185 MHz
No Mod.		VR210Adjust for 3,9 Watt on the WattMeter
11FM 27.185 MHz
No Mod.		R233
Replase R233 with 5k pot.		Adjust for 3,9 Watt on the WattMeter