ozQRP MDT Manuals

Manuals and User Guides for ozQRP MDT. We have 1 ozQRP MDT manual available for free PDF download: Construction Manual

ozQRP MDT Construction Manual

ozQRP MDT Construction Manual (42 pages)

DSB TRANSCEIVER

Brand: ozQRP | Category: Transceiver | Size: 2.47 MB

Table of Contents

Table of Contents
2
1 Introduction

4
2 DSB Vs SSB

5
3 DSB Transmitter

6
- Figure 1 DSB Generation
  6
4 Direct Conversion Receiver

7
- Figure 2 Direct Conversion Receiver
  7
5 MDT Block Diagram

8
- Figure 3 MDT Block Diagram
  8
6 Circuit Description

9
- Variable Frequency Oscillator (VFO)
  9
- Mixer
  9
- Microphone Amplifier
  10
- Transmit Amplifier
  10
- Power Supply and RX/TX Switching
  11
- Receive Audio
  11
- Figure 4 Carrier Oscillator
  12
- Figure 5 Mixer
  13
- Figure 6 Microphone Amplifier
  14
- Figure 7 Transmit
  15
- Figure 8 Receive Audio
  16
7 Kit Supplied Parts

17
8 Individual Parts List

19
9 Construction

21
- General
  21
- Building the PCB
  22
- Figure 9 Diode Identification
  22
- Figure 10 DIP Ics
  23
- Figure 11 Relay Install
  23
- Figure 12 Non-Polarised Capacitors
  24
- Figure 13 LPF Capacitor Marking
  24
- Figure 14 Trimcap Install
  25
- Figure 15 BD139 Location
  25
- Figure 16 BD139 Lead Identification
  26
- Figure 17 LED Lead Bending
  27
- Figure 18 LED Install
  27
- Figure 19 Pot with Tab Removed
  31
- Figure 20 Component Overlay
  32
10 Final Assembly

33
- Microphone Socket
  33
- Figure 21 MIC Connector Wiring
  33
- Terminating Plugs
  34
- Front Panel
  35
- Mounting the PCB
  35
11 Testing and Alignment

36
- General
  36
- Power on
  36
- Receive
  36
- Transmit
  37
- Marking the VFO Scale
  38
- Figure 22 Typical Circuit Voltages
  39
12 Modifications

40
- Setting the VFO Range
  40
- Receiver Alignment
  40
- Crystal Operation
  40
- Using a Loudspeaker
  40
13 Operation

41
- Setting up
  41
- Receiving
  41
- 13.2.1 Ssb
  41
- Transmitting
  42
- Figure 23 DSB Transmit Waveform
  42

Advertisement

Advertisement

Related Products

ozQRP Categories

Transceiver Remote Control Controller

More ozQRP Manuals