On Sun, 05 Sep 2004 16:21:27 GMT, Richard Clark
wrote:

On Sun, 5 Sep 2004 11:05:24 -0500, "Richard Fry"
wrote:

I trust my contention is now clear to you.

Hi OM,

Actually no. Your reference, Mendenhall, specifically writes about
his design:

Hi All,

I would add further, Mendenhall's notes of his design, as the model of
clarity, include references, one of which is particularly notable and
estimable within this group:
"Treman [sic], F.E.; "Electronic and Radio Engineering";
Mc Graw - Hill Book Co.; 1955"
the same publication I've had since the same date that Geoff built his
transmitter. Geoff's attachments also include the data sheets from
Eimac which show quite plainly that ALL of his formulas and
computations are congruent with ALL sources of information in his
references.

Another reference:
"Goodman, Byron (Ed.); 'The Radio Amateur's Handbook';
American Radio Relay League; Newton, Conn.;
1966"
(I used to have that publication, back then, too)

I also vaguely note some inference of peculiar intermodulation
products that would be produced by a transmitter with 50 Ohm output
characteristic - in that I may be mistaken because when the verbiage
gets particularly dense to explain simple matters, I must admit my own
filters kick in. However, Mendenhall's work was not simply that of an
amateur's project, nor was it a school term paper, nor was it the
speculation of an engineering sales pitch.

The report I am drawing upon was Geoff's own Type Acceptance
application to the FCC which included all the technical specifications
of spurs, intermodulation products, stability, efficiency (80%), class
of operation, modulation, out-of-band responses.... I don't think I
need go much further. :-)

For those who wish to read the COMPLETE story of how to build a rig,
how to specify it, how to measure it, and to note how it exactly
conforms to conventional wisdom; then visit:
http://www.techatl.com/wrek/docs/gnm_0011.htm
where you will find all of one page of theory, and 40 odd pages of
reality:
The WREK 425 Watt RF power amplifier, also known as the
"Goat-Mitter" was designed by Geoffrey N. Mendenhall (dubbed the
Goatman by WREK announcer, Ed Esserman) and constructed entirely
with hand tools by Geoff and the WREK staff in August of 1968.

73's
Richard Clark, KB7QHC