I highly recommend _Experimental Methods in RF Design_, by Hayward,
Cambell, and Larkin. It's published by the ARRL and available from them
and numerous other sources. Besides theory and a lot of real, practical,
tested circuits and projects, it includes simple test equipment you can
build yourself.

Roy Lewallen, W7EL

James Fenech wrote:
. . .
I have the ARRL handbook (1997 or so) but this doesn't have much in the way
of theory. Is there any other reference anyone can recommend?
. . .