Galaxy
DX Radios DX939
Documentation Project
CBTricks.com
Transmitter Alignment
See Alignment
Locations
| SETTINGS | CONNECTION |
ADJUST
|
ADJUST FOR |
| AM
OSC: Set radio to CH 20 AM TX mode. |
Connect Frequency Counter to TP5. |
L23
|
10.6950MHz ± 10Hz |
| TX Power: Set radio to CH 20 AM TX mode. Set SWR/MOD/PWR Switch to PWR. |
Connect RF Power Meter
to antenna jack. |
L40,L42
L43,L44 |
Set for max.
output Balance Power Between CH1 and CH40. |
| Dvr/Final
Gate Voltage: Set radio to CH 20 AM TX mode. |
Connect
voltmeter to bare lead of L37. Connect voltmeter to bare lead of L33. |
VR12
VR10 |
Adjust
for 3.75vdc Adjust for 3.65vdc |
| AM TX
High Power: Set radio to CH 20 AM TX mode. Set RF POWER fully clockwise. |
Connect RF Power Meter to antenna jack. |
VR14
|
6.0 watts |
| AM
TX Low Power: Set RF POWER fully counterclockwise. |
Connect RF Power Meter to antenna jack. |
VR18
|
2.0
watts |
| RF Power
Meter: Set radio to CH 20 AM TX mode. Set RF POWER fully clockwise. Set SWR/MOD/PWR Switch to PWR position. |
VR9
|
For a needle reading of "6" on TX PWR scale. | |
| AM
Modulation: Set radio to CH 20 AM TX mode. Set MIC Gain fully clockwise. |
Connect
AF SG to microphone input. AF signal 30mV, 1 KHz to microphone. |
VR16
|
For a needle reading of 100% on the external modulation meter. |
| AM Modulation
Meter: Set radio to CH 20 AM TX mode. Set MIC Gain fully clockwise. Set SWR/MOD/PWR Switch to MOD position |
AF signal 30mV, 1 KHz to microphone. |
VR15
|
For a needle reading of 100% on the modulation scale. |
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.