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