Table Des Matières - MDT DSB Manuel

1 Introduction .............................................................................................................................................................. 4
2 DSB vs SSB ................................................................................................................................................................. 5
3 DSB transmitter ....................................................................................................................................................... 6
4 Direct Conversion receiver ................................................................................................................................. 8
5 MDT Block Diagram ............................................................................................................................................... 9
6 Circuit Description .............................................................................................................................................. 10
6.1 Variable Frequency Oscillator (VFO) ..................................................................................................................... 10
6.2 Mixer .................................................................................................................................................................................... 10
6.3 Microphone amplifier ................................................................................................................................................... 11
6.4 Transmit amplifier ......................................................................................................................................................... 11
6.5 Alimentation et commutation RX/TX .................................................................................................................... 13
6.6 Receive audio .................................................................................................................................................................... 13
7 Kit Supplied Parts ................................................................................................................................................ 19
8 Individual Parts List ............................................................................................................................................ 21
9 Construction ........................................................................................................................................................... 23
9.1 General ................................................................................................................................................................................ 23
9.2 Construction PCB ......................................................................................................................................................... 24
10 Final Assembly ...................................................................................................................................................... 37
10.1 Terminating plugs .......................................................................................................................................................... 38
10.2 Front Panel ........................................................................................................................................................................ 39
11 Testing and alignment ....................................................................................................................................... 40
11.1 General ................................................................................................................................................................................ 40
11.2 Power on ............................................................................................................................................................................. 40
11.3 Recevoir .............................................................................................................................................................................. 40
11.4 Transmit ............................................................................................................................................................................. 41
11.5 Marking the VFO scale .................................................................................................................................................. 42
12 Modifications ......................................................................................................................................................... 44
12.1 Setting the VFO range ................................................................................................................................................... 44
12.2 Récepteur alignement ................................................................................................................................................... 44
12.3 Crystal operation ............................................................................................................................................................ 44
12.4 haut parleur ...................................................................................................................................................................... 45
13 Operation................................................................................................................................................................. 46
13.1 setting up ............................................................................................................................................................................ 46
13.2 Receiving ............................................................................................................................................................................ 46
13.2.1 SSB .......................................................................................................................................................... 46
13.2.2 CW ........................................................................................................................................................... 47
13.3 Transmitting ..................................................................................................................................................................... 48
MDT Construction Manual - Issue 4
C
ONTENTS
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