Over the last century amateur radio has evolved into numerous different
hobbies. Some hams enjoy weekend contests in which they try to
contact as many stations as possible. Others talk to as many of the
world's 341 call areas as possible and collect QSL cards to prove it. Other
hams just like to ragchew with friends. Still others communicate over
long distances at UHF frequencies using satellites, meteorites, aurora and
other substitutes for a sunspot-charged ionosphere. Some hams provide
communications for their communities during emergencies.
Many of us have returned to the early days of radio by building our own
equipment from scratch. Most home builders start by building QRP (low
power) transmitters. If this doesn't satisfy your urge to build something,
you can move on to build the entire station. That is what this website is about.
CRYSTAL SETS TO SINGLE SIDEBAND
This book on homebuilding began 15 years ago. I continue to revise it and
add projects when I have something new to offer. Comments from readers
have often helped me weed out errors and clarify the explanations. When
I make significant changes or additions to chapters, I label that chapter as
the next revision. The last chapter that received major additions was
A simplified superhetrodyne HF receiver
The book is in .PDF format and is arranged to be downloaded one chapter
at a time. Expect a short delay while each chapter is being received.
This book may be copied and used for any non-profit purpose you like.
As examples, it has been used as a textbook for beginning electronics classes.
Also, chapters have been translated into other languages and placed on amateur
radio club websites. The entire book (revision #9) was translated into Spanish
and is available below.
I welcome your comments and criticisms. Kindly e-mail me at [email protected]
73s and GL! - Frank Harris, KØIYE
Website last revised -February 14, 2019