Galaxy DX Radios DX55HP
Documentation Project

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    Owner's Manual

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      DX55HP Frequency Conversion
      Channel Chart (After Modification)
      Extended 10-Meter Frequency Conversion (28.000 - 29.655MHz)
      Roger Beep Tone Mod
      Adding Talkback Mod

     Semiconductor Datasheets

    DX55HP Schematic Diagram (EPT360015C) (May 23, 2008)
    Frequency Counter PCB Schematic Diagram (EPT210014D)

PCB Layouts and Parts
    Main PCB (EPT360015C)
    Mic Jack PCB (EPT360050Z)
    Dimmer PCB (EPT55V-51Z)
    Frequency Counter PCB (EPT210014D)
    Channel Selector PCB (EPT055V30Z)
    Display PCB (EPT055V20Z)
    PA Preamp PCB (EPT300110A)
    Slide Switch PCB (EPT055V40Z)
    VR PCB (EPT360111A)

Chassis, Miscellaneous & Mechanical Parts

    Miscellaneous & Mechanical Parts

Mic Wiring Diagram

1- Shield  (Ground)
2- Yellow  (Audio)
3- Red      (Transmit)
4- White   (Receive)

Astatic (4 wire)
1- Shield
2- White
3- Red
4- Black

Astatic (6 wire)
1- Shield & Blue
2- White
3- Red
4- Black
Yellow NC

Daiwa EM-500
Cobra CA Series

1- Shield & Black
2- Red
3- White
4- Blue

Galaxy DC-521S (4 wire)
1- Shield
2- Yellow
3- Red
4- Black

Galaxy CB-660EI
1- Shield & Black
2- White
3- Red
4- Blue

1- Shield
2- White
3- Brown
4- Green

1- Shield & Red
2- White
3- Blue
4- Black
Yellow NC

Copyright © 1998, 1999, 2000, 2001, 2002, 2003

Disclaimer: Although the greatest care has been taken while compiling these documents,

we cannot guarantee that the instructions will work on every radio presented.