AR-3300 & AR-3500 Alignment Procedures
SYNTHESIZER
1. - Set radio to 29.9000 Mhz. FM mode.
2. - Connect DVM to TP-1 and adjust T-13 for 3.8 VDC.
3. - Set the radio to 28.0000 Mhz. ( Clarifier Center
)
4. - Connect Scope to TP-2. Adjust T-12 for Max in AM mode.
5. - Connect Scope to cathode of D-77. Adjust T-11 for Max in AM mode.
NOTE : Step 2 of SSB Transmitter Alignment should be done at this time as it effects
10.695 Mhz. Oscillator adjustment.
Please note that radios with the optional 2.6 Khz. SSB filter use different offset
frequency adjustments. The filter can be identified by the markings on the top. ( 10M2.6D
is the 2.6 filter ).
6. - Connect frequency counter to TP-3 ( High impedence probe ).
4.2 Khz
. 2.6 Khz.
A. - Adjust T-16 for 10.6925 -- or - 10.6935 in USB mode.
B. - Adjust T-17 for 10.6975 -- or - 10.6965 in LSB mode.
C. - Adjust T-15 for 10.6943 -- or - 10.6943 in CW mode.
D. - Adjust T-14 for 10.6950 -- or - 10.6950 in AM TX mode.
7. - Connect frequency counter to TP-2.
4.2 Khz
. 2.6 Khz.
A. - Adjust VR-3 for 17.3050 -- or -- 17.3050 in FM mode.
B. - Adjust VR-1 for 17.3075 -- or -- 17.3065 in USB mode.
C. - Adjust VR-2 for 17.3025 -- or -- 17.3035 in LSB mode.
8. - Adjust T-14 for output freq. of 28.0000 Mhz. FM mode.
RECEIVER
IF ( 10.695 Mhz.)
1. - Set radio in AM mode. Apply a 10.6950 Mhz. ( AM modulated at 60% ) signal from
signal generator through a 10 to 1 probe to the emitter of Q-2. ( Output of Signal
Generator should be just enough to produce output at speaker, about 12 db. Sinad.)
2. - Adjust T-4, T-5, T-8, T-9, and T-10 for Max AF output.
NOTE : Any excessive Signal Generator output will activate AGC and cause a false
alignment.
3. - Set radio to CW mode, Signal generator to 0% modulation. Adjust T-6 & T-7 for max
audio output.
NOISE BLANKER
1. - Connect a noise generator ( Sencore NL 204 or equivalent ) in series with signal
generator output. Connect Scope to TP-4. Set signal generator for 20 uV. output. Adjust
T-400 & T-401 for Max peaks.
HIGH FREQUENCY
1. - Set radio to 28.0000 Mhz. on AM mode.
2. - Apply a 28.0000 Mhz. ( AM modulated at 60% ) signal to antenna.
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