From Detector to Software Defined Radio Radio frequency (RF) technology is one of the areas which still allows putting your own ideas into practice. Countless circuit variants with special objectives allow space for meaningful experiments and projects. Many things simply aren’t available off the shelf. Crystal detector radios without their own power source, simple tube receivers with a touch of nostalgia, the first reception attempts at Software Defined Radio, special receivers for amateur radio, all this can be realized with little effort and as a perfect introduction to RF electronics. For a long time, radio construction was the first step into electronics. Meanwhile, there are other ways, especially via computers, microcontrollers, and digital technology. However, the analog roots of electronics are often neglected. Elementary radio technology and easy-to-do experiments are particularly well suited as a learning field for electronics because you can start with the simplest basics here. But the connection to modern digital technology is also obvious, for example, when it comes to modern tuning methods such as PLL and DDS or modern DSP radios. This book aims to give an overview and present a collection of simple RF projects. The author would like to support you to develop your own ideas, to design your own receivers and to test them.

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zlib/Engineering/Computer Technology/Burkhard Kainka/Radio Builder's Book : From Detector to Software Defined Radio_25802467.pdf

Kainka, Burkhard;

Germany, Germany

Thanks to Team-IRA

producers:
Adobe PDF Library 17.0

{"isbns":["3895765651","9783895765650"],"last_page":186,"publisher":"Elektor"}

Find -1
Contents 5
Preface 8
Chapter 1 • Introduction 9
Chapter 2 • Detector Radios 11
2.1 The Diode Radio 11
2.2 Headphone Adapter 14
2.3 A Detector for Shortwave 15
2.4 Silicon Diode Detector 17
2.5 Coils and Resonant Circuits 18
2.6 Resonant Frequency and Bandwidth 20
2.7 The Vacuum Tube Detector 24
2.8 Diode Radio with Active Regeneration 25
2.9 Regeneration using Tubes 27
Chapter 3 • Tube Regenerative Receivers 29
3.1 Triode AM Receivers 29
3.2 A Two-stage Receiver 31
3.3 Audion Receiver with Regeneration 32
3.4 Loudspeaker Operation 37
3.5 A Regenerative Receiver using two EF95 Tubes 37
3.6 A Shortwave Audion Type 0V2 40
3.7 A 6 V Tube Regenerative Receiver 41
3.8 Cascode Triode Regeneration 42
3.9 The 6J1 Tube Radio 48
3.10 A Tube Regen for the 80 m Band 51
Chapter 4 • The Transistor Audion 53
4.1 A One Transistor Radio 53
4.2 A Shortwave PC Radio 54
4.3 Regenerative Receiver 55
4.4 Separated Feedback Paths 57
4.5 Regeneration using an Emitter Follower 60
4.6 A Medium Wave Receiver using the TA7642 61
4.7 A Retro Medium Wave Radio 63
4.8 Shortwave Regen using an Emitter Follower 65
4.9 A Shortwave Retro Radio 68
4.10 A 40-m Shortwave Audion with Regeneration 70
4.11 Shortwave Regen Optimization 73
Chapter 5 • RF Oscillators 80
5.1 LC Oscillators 80
5.2 Crystal Oscillators 81
5.3 Amplitude Modulation 82
5.4 Crystal-stabilized Medium Wave Modulator 84
5.5 The ICS307-2 PLL Clock Generator 86
5.6 A Programable Crystal Oscillator 88
5.7 CW Transmitter with an EL95 90
5.8 AM Tube Transmitter 93
5.9 A DDS Generator using the AD9835 94
5.10 The SI5351 PLL 97
Chapter 6 • Direct Mixers 100
6.1 Mixer Types 100
6.2 Direct Mixer using a BF245 105
6.3 Diode Ring Mixer 107
6.4 Direct Mixer using an NE612 108
Chapter 7 • The AM-Superheterodyne Receiver 111
7.1 An AM Shortwave Receiver using the TCA440 111
7.2 AM/FM Radio using the CD2003GP 112
7.4 DRM Receiver 114
Chapter 8 • IQ Mixers and Software Defined Radio 120
8.1 SDRadio 120
8.2 Image Frequency Rejection 121
8.3 The IQ Mixer 122
8.4 Circuit Optimization 125
8.6 Software Defined Radio with USB Interface 133
8.7 Arduino SDR Shield 137
Chapter 9 • Shortwave Antenna Design 143
9.1 Radio Wave Propagation 143
9.2 The Longwire Antenna 144
9.3 Using a Preselector 146
9.4 Tuned Magnetic Field Antennas 148
9.5 An Active Indoor Antenna 150
9.6 Antenna Preamplifier 153
Chapter 10 • VHF Radios 154
10.1 A Superregenerative Receiver 154
10.2 Vacuum Tube Super Regen Receiver 157
10.3 VHF Receiver using the TDA7088 159
10.4 Stereo Signal Decoding 162
10.5 A Plug-in VHF Module 165
10.6 'Tube Sound’ VHF Radio 166
10.7 The SI4735 DSP Radio 168
10.8 PC Radio from a USB Port 171
10.9 The VHF FM Home Radio 172
10.10 The Elektor DSP Radio 177
10.11 The BK1079/1068 FM Radio Chip 181
Index 184
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2023-08-18