Specifications

3
TABLE OF CONTENTS
1 GENERAL DESCRIPTION..................................................................................................................................................... 5
1.1 DX-3 – INTERNAL VIEW ...................................................................................................................................................... 6
2 TECHNICAL SPECIFICATIONS.......................................................................................................................................... 7
3 UNPACKING ............................................................................................................................................................................ 8
3.1 OPENING THE CARTON ......................................................................................................................................................... 8
3.2 OPENING THE DX-3 COVER .................................................................................................................................................. 8
3.3 INSTALLING THE TRANSFORMER .......................................................................................................................................... 8
4 INSTALLATION ENVIRONMENT....................................................................................................................................... 9
4.1 REQUIRED ENVIRONMENT .................................................................................................................................................... 9
4.2 POWER REQUIREMENTS ........................................................................................................................................................ 9
5 REAR PANEL........................................................................................................................................................................... 9
5.1 POWER / EARTH CONNECTIONS ............................................................................................................................................ 9
5.2 RF CONNECTIONS............................................................................................................................................................... 10
5.3 TRANSCEIVER CONTROL..................................................................................................................................................... 10
6 FRONT PANEL ...................................................................................................................................................................... 10
6.1 CONTROLS ......................................................................................................................................................................... 10
6.2 DISPLAYS ........................................................................................................................................................................... 11
7 ELECTRICAL CONNECTIONS.......................................................................................................................................... 12
7.1 CONNECTIONS TO TRANSCEIVER / EXCITER ....................................................................................................................... 12
7.2 EARTH AND MAINS CONNECTIONS ...................................................................................................................................... 12
7.3 TERMINATING THE POWER CABLE (EXPORT VERSION)........................................................................................................ 12
7.4 OPERATION AT 230V, 220V, 200V (EXPORT VERSION) ...................................................................................................... 12
8 DX-3 DESCRIPTION ............................................................................................................................................................. 13
8.1 RF SECTION ....................................................................................................................................................................... 13
8.2 MAINS TRANSFORMER........................................................................................................................................................ 14
8.3 H. V. POWER SUPPLY ......................................................................................................................................................... 14
8.4 SOFT START MODULE ......................................................................................................................................................... 14
8.5 SENSOR MODULE................................................................................................................................................................ 14
8.6 ANTENNA RELAY / QSK MODULE ...................................................................................................................................... 14
8.7 DISPLAY BOARD ................................................................................................................................................................. 14
8.8 CONTROLLER BOARD ......................................................................................................................................................... 14
9 POWERING UP...................................................................................................................................................................... 16
10 OPERATION....................................................................................................................................................................... 16
10.1 TUNNING PROCEDURE ................................................................................................................................................ 16
10.1.1 General...................................................................................................................................................................... 16
10.1.2 Preliminary tuning..................................................................................................................................................... 16
10.1.3 Final tuning ............................................................................................................................................................... 17
10.1.4. Potential problems during tuning.................................................................................................................................. 18
10.2 ALC ADJUSTMENT........................................................................................................................................................ 18
10.3 USING YOUR DX-3......................................................................................................................................................... 19
10.3.1 CW / RTTY and all digital modes .............................................................................................................................. 19
10.3.2 Voice modes (SSB)..................................................................................................................................................... 19
10.3.3 Hints on good linearity and efficiency....................................................................................................................... 19
11 SWITCHING THE POWER OFF..................................................................................................................................... 20
12 TROUBLESHOOTING - IF SOMETHING GOES WRONG........................................................................................ 20
12.1 NO POWER.......................................................................................................................................................................... 20
12.2 FAN NOT WORKING............................................................................................................................................................. 20
12.3 IF THE FAULT LIGHT TURNS ON ........................................................................................................................................ 20