Richard Fry wrote:
Many posts under the drifted thread "1/4 vs 1/2 wavelength antenna" give
various views on the physics of generating the maximum safe load power
from an RF amplifier. To those posters I present this reality.

Modern, solid-state FM broadcast transmitters WITHOUT TUNING OR OTHER
ADJUSTMENT will produce their full rated output power into a 50 ohm load
at any frequency in the 88-108MHz FM broadcast band, and with ~uniform,
and high PA efficiency (80% or better, typically). These transmitters
have no resonant circuits in their entire RF chain except for their
output lowpass/harmonic filter. It is possible to slew the tx freq from
one end of the band to the other in the time it takes for the exciter to
lock up on the new frequency (a second or two).

This reality seems at odds with many of the declarations made in this
NG, and perhaps may inspire some posters to further research their
opinions and theories.

RF

Visit http://rfry.org for FM transmission system papers.

Read the book _Radio Frequency Transistors Principles and
Practical Applications_, by Norm Dye and Helge Granberg. At
some point in the book, they go to great lengths dealing
with "matching" the input and output of transistors and how
to effect broadband matching schemes. They even mention some
transistors that are manufactured in such a way as to be
internally matched over a particular range of frequencies.
It doesn't hurt to read books by guys who know what they're
talking about.
73,
Tom Donaly, KA6RUH