Galaxy
DX Radios DX979
Documentation Project
CBTricks.com
Transmitter Alignment
See Alignment
Locations
| SETTINGS | CONNECTION |
ADJUST
|
ADJUST FOR |
|
Remove
TP7-TP9 Jumper PCB.
|
|||
| TX
Frequency: OffsetSet radio to CH 20 LSB TX mode. NOTE: If the radio has the clarifier mod done skip this step. |
Connect frequency counter to TP3 |
VR7
|
16.50750 MHz ±20Hz. |
| AM OSC: Set radio to CH 20 AM TX mode. |
Connect frequency counter to TP5 |
L23
|
10.69500 MHz ±20Hz. |
| USB
OSC: Set radio to CH 20 USB TX mode. |
Connect frequency counter to TP6. |
L24
|
10.69250 MHz ±20Hz. |
| LSB OSC: Set radio to CH 20 LSB TX mode. |
Connect FC
to TP6. |
L25 |
10.69750 MHz ±20Hz.
|
| BIAS Current: Set radio to CH 20 USB TX mode. MOD off. |
Connect current meter to TP7(+) and TP9(-) Connect current meter to TP7(+) and TP8(-) |
VR12
VR10 |
50 mA 100 mA |
|
Replace
TP7-TP9 Jumper PCB.
|
|||
| SSB
APC: Set radio to CH 20, USB TX mode. MOD off. |
Connect Voltmeter to TP7. |
VR17
|
DC12.5V |
| SSB TX Power: Set radio to CH 20, Mike Gain max USB TX mode. AF signal 30 mV, 1 KHz to microphone. |
Connect RF power meter to antenna jack. AF SG to microphone. |
L40, L42,
L43, L44
|
Adjust for max. power with min. spurious emission
|
| SSB ALC: Audio signal 30 mV, 1 KHz to microphone.Set radio to CH 20, USB TX mode. |
Connect wattmeter to ANT output. Set
RF Power control fully clockwise. |
VR13
|
Adjust for
12 Watts output |
| SSB Carrier: BalanceSet radio to CH 20, USB TX mode. Mic Gain off. |
Connect wattmeter to ANT output. Connect scope to Antenna Connector. |
VR6
|
Spurious Emission To Minimum. |
| AM TX Power: Set radio to CH 20 AM TX mode. No MOD. |
Connect wattmeter to ANT output. Set RF Power control fully clockwise. Then set RF Power control
fully counter clockwise |
VR14 VR18 |
Adjust for 4.0 watts Adjust for 1.0 watts |
| RF
Power Meter: Set radio to CH 20 AM TX mode. Mod off. |
Connect wattmeter to ANT output. |
VR9
|
Adjust RF Power meter to "4" on PWR scale. |
| AM Modulation: Set radio to CH 20 TX mode. Audio signal 30 mV, 1 KHz to microphone. Set Mic Gain Fully Clockwise. |
Connect AF SG to microphone input. |
VR16
|
Adjust for total 100% modulation |
| Modulation
Meter Adjust: Set Meter mode switch to MOD. Set radio to CH 20 TX mode. Audio signal 30 mV, 1 KHz to microphone. Set Mic Gain Fully Clockwise. |
Connect AF SG to microphone input. |
VR15
|
Adjust for 100% on radio's modulation meter. |
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.