Galaxy
DX Radios "Galaxy Plus"
Documentation Project
CBTricks.com
Transmitter
Alignment
See Alignment
Locations
| SETTINGS | CONNECTION |
ADJUST
|
ADJUST FOR |
|
Remove
TP7-TP9 Jumper PCB.
|
|||
| TX
FREQUENCY: Set mode to LSB |
Connect Frequency Counter to TP3 (top bare lead of R74). |
VR21
|
Key TX; Adjust for 16.2675MHz ±20 Hz. |
| CARRIER
OSCILLATOR OFFSETS: TX Mode Freq. to 26.965MHz Band D |
Connect Frequency Counter to TP6 (top bare lead of R102). |
L28 |
LSB/TX mode: Adjust for 10.6975MHz ±20Hz.
|
| Connect Frequency Counter to TP6 (top bare lead of R102). |
L27
|
USB/TX
mode: Adjust for 10.6925MHz ±20 Hz. |
|
| Connect Frequency Counter to (top bare lead of R151). |
L26
|
AM/TX mode: Adjust for 10.6950MHz ±20 Hz. | |
|
DRIVER BIAS: |
Connect
DC Ammeter between TP9 and TP8. |
VR11
|
Key TX adjust for 50-75mA. |
| FINAL
BIAS: Band Switch & Ch. Selector to 26.965 MHz Ch.1 Band D Mode to USB MIKE GAIN at minimum. |
Connect DC Ammeter
between TP9 and TP7. |
VR10 |
Key TX & adjust VR10 & VR20 for minimum ( 0mA ) current. Next adjust VR10 for 50mA, then adjust VR20 for 100mA total. |
|
Replace
TP7-TP9 Jumper PCB.
|
|||
| RF AMP
CHAIN: Replace PCB shorting jumper. Set mode to AM. Set RF power switch to H. |
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. |
| SSB
CARRIER BALANCE: Set mode to USB MIKE GAIN to minimum. |
Connect wattmeter to ANT output. |
VR7 |
Key TX; adjust for mim. carrier leakthrough on scope or wattmeter. Recheck on LSB mode. If necessary readjust for best balance of sideband suppression between LSB & USB |
| SSB
ALC: Mode to USB. MIKE GAIN to maximum. Inject two-tone audio signal of 500 Hz and 2400 Hz, 30 mV (-18 dBm) at MIC jack. |
Connect
wattmeter to ANT output. audio generator to Mic Jack |
VR12
|
Key TX; adjust for 25 watts PEP. |
| AM
CARRIER POWER HIGH: Set mode to AM, MIKE GAIN at minimum. RF Power to H. |
Connect wattmeter to ANT output. |
VR13 |
Key TX; adjust for
for 10 watts |
| AM CARRIER
POWER MED: Set mode to AM, MIKE GAIN at minimum. RF Power to M. |
Connect wattmeter to ANT output. |
VR24
|
Key TX
& adjust for 4 watt output. (NOTE: VR24 is not marked on the PCB.) |
| AM CARRIER
POWER LOW: Set mode to AM, MIKE GAIN at minimum. RF Power to L. |
Connect wattmeter to ANT output. |
VR16
|
Key TX & adjust for 1 watt output |
| RF METER: Set mode to AM, MIKE GAIN at minimum. RF Power to H. |
Connect wattmeter to ANT output. |
VR8
|
Adjust so panel meter agrees with wattmeter. |
| AMC: Mode to AM. 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% on 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 4.5KHz on deviation meter. |
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.