Richard,

It always astounds me how the technically challenged are wont to launch ad
hominem attacks instantly when matters evidently beyond their understanding,
or perhaps in disagreement with their preconceived notions and prejudices,
are brought to light.

I note that not a single statement that I made in my posting is either
declared incorrect or is replaced by your version of "truth."

All I read is a lot of disconnected, poorly conceived and worded "slams" at
me for posting the piece in the first place.

The note was addressed to Ian who points out that he agrees totally with
everything that I said. Why not select him as a target as well ? Double your
pleasure with two targets! And, of course, appear the fool twice for making
such an inane posting in the first place.

Further to the point, no one has offered a single word of disagreement with
the factual content of the posting. Only you have felt compelled to take
your valuable time to post nonsense mouthings having nothing to do with the
subject matter.

Richard, in the past I have had a small degree of respect for your postings
and your viewpoints, but if this is the best you can do now, then clearly
it is time for you to resume your meds.

Historically, you seldom if ever contribute anything of substance to a
discussion but rather tend to sit on the sidelines making learned comments
about the abilities of the participants to present their material and the
degree to which they fail to meet your high standards for discourse.

Yep, time for the meds . . .

Or, perhaps you could actually contribute something of value by telling us
where my posting is in error in *fact*, not in error for having been posted.
I presume that you feel capable of tackling that chore.

But, you are right about one thing: if you are an example of "us folks" then
I am definitely not one of you, and very proud of it.

73/72, George
Amateur Radio W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
"In the 57th year and it just keeps getting better!"








"Richard Clark" wrote in message
news
On Fri, 15 Aug 2003 07:45:32 GMT, "George, W5YR"
wrote:

About all that anyone needs to know about an amateur radio amplifier
(transmitter) in order to use it properly is the output power level and
the
required load resistance.

Hi George,

And us folk need never worry about what is beneath the hood as long as
we don't need a mechanic. Sheesh, haven't you learned to turn the
knob until the meter is full scale? All you have to really remember
to push the button before you talk!

The latter is usually 50 ohms for a variety of
reasons, most of which relate to convenience, availability of coax
cables,
test equipment impedance environment, etc.

For which us same folk STILL don't give a fig. Are you some sort of
salesman? Who uses coax when telephone wire is free? You got stock
in this cable stuff? I got satellite and I don't need it.

Beyond those values, there is
nothing about the amplifier design which is used in designing and
adjusting
the remainder of the tuner, transmission line and antenna system.

What are you talking about designing? Is your charge card void? Do
the sales clerks ignore you? Have you consider stitching your own
semaphore flags for a hobby instead? At least no one would laugh as
much for all the arm waving.

The power
level is of importance only in telling us how much voltage and current is
involved in various parts of the system.

None of us folk even think of voltage or current, this impotence is
not needed to make a contact. What's the point?


The result is the ultimate in convenience.

Something that us folk take for granted and never give a thought to
because it is exactly that: convenient. Are you writing a magazine
article no one reads? I hope you include lots of pictures. I prefer
Reader's Dogma myself.

We need have no intimate
knowledge of "what is in the black box" in order to use it properly.

Us folk would ask "what is in the black box? What are YOU talking
about?" My boxes are brown like any from the liquor store. The only
black box I've seen was at the cemetery. I don't think I will worry
how to use THAT properly - thank you!

In
fact, even if we had full knowledge of all the particulars of the design,
we
would still use only its required load resistance and power levels
associated with it modulation waveforms, etc.

WE? You don't talk like one of us folk!


Our modern amateur transmitters and amplifiers even have a convenient
meter
on the front panel that tells us when we have met our obligation to
provide
a 50+j0 ohm load. It may be labeled "SWR" and calibrated in an unusual
scale, but the important thing is that when it reads 0 or "1:1 SWR" that
tells us that we have met the load resistance obligation - nothing more
or
less.

Who looks at that - are you one of those goggle-eyed professors that
try to 'splain the meaning of life? You missed that by a country mile
and still don't seem to have learned about what knobs are for. Twist
one and push buttons until someone talks back. Your black box
obviously has none of the modern conveniences, is it a telegraph?


I think that a great deal of confusion over this whole issue comes from
two
sources:

1. vague efforts to apply the infamous "Maximum Power Transfer Theorem"
from
the early days in undergrad EE school; and

Us folk never went to this underground school, nothing to be confused
about at all. Are your problems from being a squinty-eyed miner?
Maybe that's why you can't read these meters. Pull the blinds and
take a load off your peepers.


2. confusing an r-f transmitter output stage with the classical "signal
generator" with a dissipative 50-ohm internal resistance.

What language are you trying to talk?

Forget both of those irritants and concentrate on the required load for
the
transmitter, which the designer will provide and insist upon, and then
adjust the antenna system to provide that load and all will be well.

Gawd this is complexity for its own sake, you white coated pencil
necked geeks need to get a life. If you are looking for the good
times, pop the cap off a cold long-neck. I hope you don't need a
glass, you would strangle fun out of TV.


At no point will anyone, including the r-f amp designer in all
likelihood,
know or even care what the so-called "internal resistance" of the
amplifier
happens to be. He demands only one thing: the specified load resistance.
Given that, his design will deliver the required power, efficiency, heat
load, harmonic content, distortion levels, etc. etc.

Infernal resistance is right. distortion is what I don't want to hear
and what you are spouting on about is rattling the cone on my speaker.


I know of no instance in the design of everything connected to the output
port of the transmitter where there is need to know anything other than
the
required load resistance for the amplifier and the power levels (average,
peak, etc.).

Is this bragging or complaining? Talk to your chaplain for relief.


Why do folks make this so complicated, Ian?

73/72, George

Oh! a philosopher hmm? About the only complication is the broken
lever of my Lazy Boy. Do you have a screw driver? Drink it college
boy, but don't ralph on the couch when you pass out.

73's
The mythical lurker.... ;-)