Galaxy DX Radios DX93T
Documentation Project

CBTricks.com

Transmitter Alignment
See Alignment Locations

SETTINGS CONNECTION
ADJUST
ADJUST FOR
Remove TP7-TP9 Jumper PCB.
TX CARRIER OSCILLATORS:
AM TX Mode
Band E CH. 1 
Connect Frequency Counter to TP6
L25
LSB/TX mode: Adjust for 10.6975MHz ±20Hz.
Connect Frequency Counter to TP6 
L24
USB/TX mode: Adjust for 10.6925MHz ±20 Hz.
Connect Frequency Counter to TP5
L23
AM/TX mode: Adjust for 10.6950MHz ±20 Hz.
DRIVER BIAS: (2SC2166)
Set Radio to: 

Band E, Ch.1

Mode to USB

MIKE GAIN at minimum.
Connect DC Ammeter between TP7 and TP9. 
VR12
Key TX adjust for 75-100mA. 
FINAL BIAS: (2SC2312)
Set Radio to: 

Band E, Ch.1 

Mode to USB

MIKE GAIN at minimum
Connect DC Ammeter between TP7 and TP8. 
VR11 
Key TX & adjust VR11 for 25-30mA.
AMP BIAS: (2SC2290)
Set Radio to: 

Band E, Ch.1 

Mode to USB

MIKE GAIN at minimum
Connect the red lead of the DC Ammeter to the (+) terminal on chassis mounted terminal connector next to DC power jack. Unplug the red wire connector from the AMP pcb  and connect the black lead of the DC Ammeter to that post
None
Check for 50-60mA.
Replace TP7-TP9 Jumper PCB.
RF AMP CHAIN:
Replace 
shorting pcb.
Set mode to AM.

Set RF power switch to HI .
Connect wattmeter to ANT output. 
L44, L43, 
L42, L40,


L44 
Key TX & adjust (in order) for maximum RF output . Recheck power across entire freq range.
 Readjust L44 for minimum SSB distortion.
SSB CARRIER BALANCE:
Set mode to USB

Set RF power switch to HI

MIKE GAIN to minimum.
Connect wattmeter to ANT output.
 
VR6
Key TX, adjust for min. carrier leakthrough on scope or wattmeter. Recheck on LSB mode. If necessary readjust for best balance of sideband suppression between LSB & USB
SSB APC:
Set mode to USB

Set RF power switch to HI

MIKE GAIN to minimum.
Connect DC voltmeter from pcb ground to TP7
VR17
In TX,
adjust for 13.0vdc
SSB ALC:
Mode to USB. 

MIKE GAIN to maximum. 

Inject two-tone audio signal of 700Hz and 1900Hz, 30 mV to Mic input.
Connect wattmeter to ANT output.
 
VR13


L44
In TX, adjust for 
50 watts PEP.

Adjust for minimum distortion on scope
AM CARRIER POWER:
Set mode to AM, 

MIKE GAIN at minimum.

RF Power SW to HI.
Connect wattmeter to ANT output.
CAUTION! Do not exceed power levels. Damage to power transistors and inability to achieve 100% modulation from insufficient audio power will result.

 VR14

Set RF PWR to HI
adjust for 20-25 watts 
VR911
Set RF PWR to MED
Adjust for 10-15 watts
VR18
Set RF PWR to LO
Adjust for 2-5 watts
RF METER:
Set mode to AM,

RF Power SW to HI

MIKE GAIN at minimum.

Meter Switch to PWR
Connect wattmeter to ANT output.
VR9
Adjust so meter agrees with Wattmeter.
AMC:
Mode to AM. 

RF Power SW to HI

MIKE GAIN to maximum. 

Inject audio signal of 1KHz at 30mV to Mic input.
Connect modulation meter to ANT output.
VR16
Adjust for 100% modulation depth.
MODULATION METER:
Mode to AM. 

RF Power SW to HI

MIKE GAIN to maximum.

Meter Switch to MOD

Inject audio signal of 1KHz at 30mV to Mic input.
Connect modulation meter to ANT output.
VR15
Adjust so meter agrees with modulation meter.
FM DEVIATION:
Mode to FM

MIKE GAIN to maximum. 

Inject 1 KHz, 30 mV audio signal at mike jack.
Connect deviation meter to ANT output.
VR5
Adjust for total deviation of 4.5 KHz.

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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.