| PLL
ALIGNMENT |
| ITEM |
U.U.T. (UNIT UNDER TEST)
SETTING |
ADJUST
POINT |
MEASUREMENT |
Regulator
Voltage |
Connect Voltmeter positive lead to power switch.
Connect Voltmeter negative lead to PCB ground. |
VR701 |
13.8 VDC |
| VCO |
Disconnect 'short PCB' from TP7, TP8 and TP9.
Set radio to CH 1 AM RX mode.
Connect Voltmeter to TP2. |
L14 |
2.5 VDC t 0.1 |
Set CLARIFIER Control to 12 o'clock.
Connect Oscilloscope to TP3. |
L15 |
Adjust for max. |
| Connect Frequency Counter to IC3 Pin 8 |
VC1 |
10.2400MHz t 20Hz |
| AM Frequency |
Set radio to CH 1 AM RX mode.
Connect Frequency Counter to TP3. |
L20 |
16.2700MHz t 20Hz |
| USB Frequency |
Set radio to CH 1 USB RX mode.
Connect Frequency Counter to TP3. |
L21 |
16.2725MHz ± 20Hz |
| LSB Frequency |
Set radio to CH 1 LSB RX mode.
Connect Frequency Counter to TP3. |
L22 |
16.2675MHz ± 20Hz |
TX Offset
Frequency |
Set radio to CH 1 AM TX mode.
Connect Frequency Counter to TP3. |
VR7 |
16.2675MHz t 20Hz |
| AM OSC |
Set radio to CH 1 AM TX mode.
Connect Frequency Counter to TP5. |
L23 |
10.695OMHz ± 10Hz |
| USB OSC |
Set radio to CH 1 USB TX mode.
Connect Frequency Counter to TP6. |
L24 |
10.6925MHz t 10Hz |
| LSB OSC |
Set radio to CH 1 LSB TX mode.
Connect Frequency Counter to TP6. |
L25 |
10.6975MHz:t 10Hz |
| TRANSMITTER
ALIGNMENT |
| BIAS Current |
Set radio to CH 19 USB TX mode.
Modulation Off.
Connect current meter to TP7(+) and TP9
Connect current meter to TP7 (+) and TP8 |
VR12
VR10 |
50 mA
100 mA |
| SSB APC |
Set radio to CH 19 USB RX mode.
Connect Multimeter to TP7. |
VRI7 |
12.5 VDC |
| SSB TX Power |
Connect "short PCB" to TP7, TP8 and
Connect RF Power Meter to antenna jack.
Set radio to CH 19 USB TX mode.
AF signal 30mV, 1 KHz to microphone.
Set RF PWR Fully Clockwise.
Set MIC GAIN Fully Clockwise. |
L40,L42,
L43,L44 |
MAX > 12W
Spurious Emission
Minimum.
Balance Power
Between CH1 and
CH4O. |
| SSB ALC |
Set radio to CH 19 USB TX mode.
AF signal 3OmV, I KHz to microphone |
VRI3 |
11.5 W |
SSB Carrier
Balance |
Set radio to CH 19 USB TX mode.
Set MIC GAIN Fully Counter Clockwise.
Connect Oscilloscope to antenna connector. |
VR6 |
Spurious Emission to
Minimum. |
AM TX
High Power |
Set radio to CH 19 AM TX mode.
Modulation Off. |
VR14 |
3.8 W |
AM TX
Low Power |
Set RF POWER fully counterclockwise. |
VR18 |
0.5w |
RF Power
Meter |
Set radio to CH 19 AM TX mode.
Set RF POWER fully Clockwise.
Set SWR/MOD/PWR Switch to PWR position |
VR9 |
For a needle reading
of "4" on TX PWR
scale. |
AM Modulation
Meter |
Set radio to CH 19 AM TX mode.
AF signal 30mV, 1 KHz to microphone.
Set MIC Gain fully Clockwise.
Set SWR/MOD/PWR Switch to MOD position |
VR16 |
For a needle reading
of 95% on the
Modulation scale. |
Frequency
Counter Adjust |
Set radio to CH 19 AM RX mode
Set CLARIFIER Control to 12 o'clock. |
VC1 on
frequency
counter
PCB. |
Display should be
27.1850 |
|
RECEIVER ALIGNMENT
|
| AM Sensitivity |
Set radio to CH 19 AM RX mode.
Set RF GAIN Fully Clockwise.
Set SQ Fully Counter Clockwise.
Set VOL Control at 2 o'clock.
Set NB/ANL switch to OFF position.
Set TONE Fully Clockwise.
Set CLARIFIER Control to 12 o'clock.
Connect RF SG to antenna jack
Frequency 27.185 MHz, lmV.
Mod 30%. |
L2,L3,L5,L6,
L7,L8,L9,L10 |
Audio Output > 2V
S/N > 10 dB. |
Set radio to CH 40 AM RX mode.
RF SG setting 27.405 MHz.
Set radio to CH 1 AM RX mode.
RF SG setting 26.965 MHz. |
L5,L6 |
For Balance Between
CH 1 and CH 40 |
| USB Sensitivity |
Set radio to CH19 USB RX mode
Set VOL Control Fully Clockwise.
RF SG setting 27.186 MHz, 0.5uV. Mod off. |
L11,L12 |
Audio Output > 2V
S/N > lOdB |
| LSB Sensitivity |
Set radio to CH19 LSB RX mode
Set VOL Control Fully Clockwise.
RF SG setting 27.184 MHz, 0.5uV. Mod off. |
L11,L12 |
Audio Output > 2V
S/N >lOdB. |
| NB Adjust |
Set radio to CH 18 AM RX mode.
RF SG setting 27.185 MHz, 1000mV
Mod off.
Set NB/OFF switch to ON position.
Connect Multimeter to TP1 (D2 cathode). |
L1 |
DC Voltage to max.
(> 2.OV) |
| AM Squelch |
Set radio to CH 19 AM RX mode.
Set SQ Control Fully Clockwise.
RF SG setting 27.185 MHz, 2OmV. Mod 30%. |
VR4 |
Adjust very slowly
until squelch just
closes. |
| SSB Squelch |
Set radio to CH 19 USB RX mode.
Set SQ Control Fully Clockwise.
RF SG setting 27.186 MHz, 20 mV. Mod off. |
VR3 |
Adjust very slowly
until squelch just
closes. |
| AM S-Meter |
Set radio to CH 19 AM RX mode.
RF SG setting 27.185 MHz, 100mV.
Mod 30%. |
VR1 |
For a reading of "9"
on the "S" scale. |
| SSB S-Meter |
Set radio to CH 19 USB RX mode.
RF SG setting 27.186 MHz, 100mV.
Mod off. |
VR2 |
For a reading of "9"
on the "S" scale |