Alignment
3-4
3rd Local Amp
r Remove the coaxial plug from J4003 and connect a 50 W re-
sistor in parallel with the RF millivoltmeter across the socket.
r Adjust T4008 and T4009 in succession several times for peak
RF millivoltmeter indication (at least 100 mVrms).
r Replace the RF millivoltmeter with a frequency counter at
J4003, and confirm that the frequency is 8.670 MHz (±30 Hz).
r Remove the frequency counter and resistor, and replace the
plug in J4003.
PLL BPF (67.98 MHz)
r Connect the RF millivoltmeter to TP4001, and adjust T4002
~ T4005 in succession several times for peak RF millivoltmeter
indication (at least 100 mV).
PLL Main Loop VCO
r Connect the DC voltmeter to TP4003.
r Referring to the table below, tune the transceiver to each fre-
quency, then confirm or adjust the listed component for the
required voltage.
r Tune the transceiver display to 14.200 MHz. Connect the DC
voltmeter to TP4005, and adjust VR4001 for 1.65V (±0.05
V) on the DC voltmeter.
PA Unit
Refer to the drawing below for PA Unit component locations
and alignment points.
Idling Current (Class “AB”)
r Temporarily disconnect the jumper wire which connected be-
tween TP6101 and TP6102, and connect an ammeter in place
of the jumper.
r Key the transmitter in either USB or LSB with no microphone
input, and adjust VR6101 for 400 mA (±50 mA).
r Reinstall the jumper.
Idling Current (Class “A”)
r Temporarily disconnect the jumper wire which connected be-
tween TP6101 and TP6102, and connect an ammeter in place
of the jumper.
r Press the CLASS-A switch. Key the transmitter in either USB
or LSB with no microphone input, and adjust VR9001 on the
REG Unit for 9.0 A (±0.2 A).
r Depress the CLASS-A switch, then reinstall the jumper.
Tune to:
7.499 MHz
4.000 MHz
3.999 MHz
0.100 MHz
14.499 MHz
7.500 MHz
21.999 MHz
14.500 MHz
30.000 MHz
22.000 MHz
for
8.5 ± 0.1 V
1.3 ~ 3.5 V
6.5 ~ 8.5 V
1.5 ~ 2.5 V
8.5 ± 0.1 V
1.3 ~ 2.3 V
8.5 ± 0.1 V
1.3 ~ 2.3 V
8.5 ± 0.1 V
1.3 ~ 2.3 V
Adjust/Confirm
Adjust TC4001
Confirm
Confirm
Confirm
Adjust TC4002
Confirm
Adjust TC4003
Confirm
Adjust TC4004
Confirm
PLL Main Loop VCO Alignment
PA Unit Test & Alignment Points
VR6101
Idling Current (Class-AB)
TP6101
Idling Current (Class-AB): Connect DC Ammeter
(400 mA ± 50 mA)
TP6102
Idling Current (Class-AB): Connect DC Ammeter
(400 mA ± 50 mA)
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