Book Chapters
ABOUT
THIS BOOK
WHAT IS A DUPLEXER?
EFFICIENCY
CAVITIES
COUPLING LOOPS
LOSSES
BETWEEN-CAVITY LINES
TUNING
CONSTRUCTION |
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Building Your Own Cavity Duplexer
Several years ago, when I was an active ham repeater builder,
I was always in the market for cavity duplexers. They are an essential
component of almost all repeaters. Unfortunately, inexpensive used cavities
and duplexers are often hard to find.
So I undertook what many of my ham friends told me was impossible, to
build my own. To my delight, and despite the dire |
![](/pix/w6nbc-duplexer.gif) |
warnings, I was successful. Subsequently, I was able to install a number
of my home-built duplexers on amateur radio repeaters in the San Francisco
area.
At that time I also began to write a book to describe my experiences,
that you may access to the left. I wanted to be of assistance to other
hams who might want to duplicate my efforts, or at least better understand
the duplexer(s) that they already owned.
I never totally finished the book. So rather than continuing to pack
the unpublished manuscript around with me, I offer it here in its unfinished
state. I'm sorry that there is nothing still existing, diagrams, plans,
etc., than what you find here.
John Portune W6NBC |