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
|
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 |
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. |
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.