Raspberry Pi for Radio Amateurs

Although much classical HF and mobile equipment is still in use by many
amateurs, the use of computers and digital techniques has now become
very popular among amateur radio operators. Nowadays, anyone can
purchase a £40 Raspberry Pi computer and run almost all amateur radio
software on the ‘RPi’, which is slightly bigger than the size of a credit card. 

The RTL-SDR devices have become very popular among hams because
of their very low cost (around £12) and rich features. A basic system may
consist of a USB based RTL-SDR device (dongle) with a suitable antenna,
an RPi computer, a USB-based external audio input-output adapter, and
software installed on the Pi. With such a simple setup it is feasible to
receive signals from around 24 MHz to over 1.7 GHz. With the addition
of a low-cost upconverter device, an RTL-SDR can easily and efectively
receive the HF bands. 

This book is aimed at amateur radio enthusiasts, electronic engineering
students, and anyone interested in learning to use the Raspberry Pi to
build electronic projects. The book is suitable for the full range of beginners
through old hands at ham radio. Step-by-step installation of the operating
system is described with many details on the commonly used Linux
commands. Some knowledge of the Python programming language
is required to understand and modify the projects given in the book.
Example projects developed in the book include a station clock, waveform
generation, transistor amplifier design, active filter design, Morse code
exerciser, frequency counter, RF meter, and more. The block diagram,
circuit diagram, and complete Python program listings are given for each
project, including the full description of the projects. 

Besides wide coverage of RTL-SDR for amateur radio, the book also
summarizes the installation and use instructions of the following ham
radio programs and software tools you can run on your Raspberry Pi:
TWCLOCK, Klog, Gpredict, FLDIGI, DIRE WOLF, xcwcp, QSSTV,
LinPsk, Ham Clock, CHIRP, xastir, and CQRLOG.