Table Of Contents - ozQRP MST400 Construction Manual

1 Introduction .............................................................................................................................................................. 4
2 Block Diagram .......................................................................................................................................................... 5
3 Circuit Description ................................................................................................................................................. 6
3.1 SSB generator.................................................................................................................................................. 6
3.2 Transmit mixer ............................................................................................................................................... 6
3.3 Power amplifier ............................................................................................................................................. 7
3.4 Receive mixer .................................................................................................................................................. 7
3.5 Receive audio .................................................................................................................................................. 8
4 Parts List .................................................................................................................................................................. 14
4.1 Main Board Parts ........................................................................................................................................ 14
4.2 Band Specific Parts .................................................................................................................................... 16
4.3 Off Board Parts ............................................................................................................................................ 16
5 Construction ........................................................................................................................................................... 17
5.1 General ............................................................................................................................................................ 17
5.2 Construction Steps ..................................................................................................................................... 17
6 Enclosure ................................................................................................................................................................. 23
6.1 Rear Panel ..................................................................................................................................................... 23
6.2 Front Panel .................................................................................................................................................... 23
6.3 Mounting the PCB....................................................................................................................................... 23
6.4 Front panel label ......................................................................................................................................... 24
6.5 Fitting the DDS VFO ................................................................................................................................... 26
7 Wiring up ................................................................................................................................................................. 27
8 Testing and alignment ....................................................................................................................................... 29
8.1 General ............................................................................................................................................................ 29
8.2 Power on ........................................................................................................................................................ 29
8.3 Receive ............................................................................................................................................................ 30
8.4 Transmit ......................................................................................................................................................... 30
8.5 Carrier frequency adjustment ............................................................................................................... 32
9 Operation................................................................................................................................................................. 33
MST Construction Manual - Issue 1
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