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President Grant CB-Radio


ALIGNMENT PROCEDURE


RECEIVER PORTION


Test equipment required:
Power Supply: 13,8 VRF Signal GeneratorDummy Load 8 ohmOscilloscope
AF VTVM

Preparation alignment:
ClarifierMid.
SQ GAINMax.
AF GAINMax.
RF GAINMax.
MIC GAINMax.
MOD, S/RFS/RF
NB/ANLOff
RF SSGModulation: 30% AM 1000Hz
StepConditionAdjustmentProcedure
1Mode: RX AM
Band: Mid.
Channel: 19
L8Set RF SSG on 27.185MHz, 1kHz 30% AM-mod. Adjust L8 for maximum reading on oscilloscope.
2Same as STEP 1L7 L9 L11 L12 L13 L52 L3 L4 L5Adjust level of RF SSG to obtain 2V on AF VTVM then adjust coils for maximum reading on meter.
3Same as STEP 1L8Adjust to obtain minimum difference between Ch. 40 and Ch. 1
4Same as STEP 1VR1Set the level of RF SSG to 100mV. Adjust VR1 for "5-9" reading on tranceiver meter.
5Same as STEP 1VR4Set SQ on max. Adjust level of RF SSG to 1000mV, adjust VR4 so that the radio signal will apper on tranceiver. Set SQ on minimum.
6Same as STEP 1
Mode: USB
L14 L15Set RF SSG on 27.186MHz. Adjust coils to obtain maximum reading on oscilloscope.
7Same as STEP 1VR2Set level of RF SSG to 100uV. Adjust VR2 to obtain "S9" on transmitter meter.
8Same as STEP 1
SQ: Max.
VR3Set level of RF SSG to 1000mV. Adjust VR3 so that the audio signal will apper on tranceiver
9Same as STEP 1
NB/ANL: ON
MID, Ch.18, USB
L1 L2Set RF SSG on 27.185MHz, 0% Mod., 10uV Level. Connect oscilloscope on D2 and adjust the coils to obtain maximum deviation.
10Same as STEP 1L6Set RF SSG on 27.185MHz with 1 kHz deviation, 1000mV Level. Adjust L6 to obtain maximum.