Galaxy DX Radios DX33HP (MOSFET Final)
Documentation Project
CBTricks.com

Transmitter Alignment
See Alignment Locations

SETTINGS CONNECTION
ADJUST
 ADJUST FOR
CARRIER OSCILLATOR OFFSETS:
TX Mode
Freq. to 26.965MHz Band E
Power to HI
Mode to AM
Mic to OFF
 Connect Frequency Counter to (top bare lead of R151).

L26

AM/TX mode: Adjust for 10.6950MHz ±20 Hz.
DRIVER BIAS:
TX Mode
Freq. to 26.965MHz Band E
Power to HI
Mode to AM
Mic to OFF		 Connect DC voltmeter to gate lead of TR44
VR11
 Key TX adjust for 3.80VDC
FINAL BIAS:
TX Mode
Freq. to 26.965MHz Band E
Power to HI
Mode to AM
Mic to OFF

Connect DC voltmeter to gate lead of TR56.


Connect DC voltmeter to gate lead of TR43

VR20


VR10

Key TX adjust VR20 for 3.60VDC

Key TX adjust VR10 for 3.60VDC
RF AMP CHAIN:
Set mode to AM.
Set RF power MAX .		 Connect wattmeter to ANT output.
L43, L44,
L42, L40,
L33
 Key TX & adjust (in order) for maximum RF output . Recheck power at lowest & highest channels; readjust if necessary for balance across entire bandwidth.
AM CARRIER POWER HI:
Set mode to AM,
MIKE GAIN at minimum.
RF Power to HI.		 Connect wattmeter to ANT output.

VR13

Key TX; adjust for for 8-10 watts
CAUTION! Do not exceed this level. Damage to power transistors and inability to achieve 100% modulation from insufficient audio power will result.

AM CARRIER POWER MEDIUM:
Set mode to AM,
MIKE GAIN at minimum.
RF Power to MED. 		Connect wattmeter to ANT output.
VR22
 Key TX & adjust for 4 to 5 Watt output.
AM CARRIER POWER LOW:
Set mode to AM,
MIKE GAIN at minimum.
RF Power to LO .		 Connect wattmeter to ANT output.
VR16
 Key TX & adjust for 1 to 2 Watt output
RF METER:
Set mode to AM,
MIKE GAIN at minimum.
RF Power to HI.		 Connect wattmeter to ANT output.
VR8
 Adjust so panel meter agrees with Wattmeter.
AMC: HIGH POWER
Mode to AM.
Power to HIGH
MIKE GAIN to maximum.
Inject audio signal of 1KHz 30mV (-18 dBm) at MIC jack.
Connect modulation meter to ANT output.
VR14
 Adjust for 100% modulation depth.
AMC: MED POWER
Mode to AM.
Power to MED
MIKE GAIN to maximum.
Inject audio signal of 1KHz 30mV (-18 dBm) at MIC jack.		 Connect modulation meter to ANT output.
VR23
 Adjust for 100% modulation depth.
AMC: LOW POWER
Mode to AM.
Power to MED
MIKE GAIN to maximum.
Inject audio signal of 1KHz 30mV (-18 dBm) at MIC jack.		 Connect modulation meter to ANT output.
VR12
 Adjust for 100% modulation depth.
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.