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.

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Disclaimer: Although the greatest care has been taken while compiling these documents,

we cannot guarantee that the instructions will work on every radio presented.