"james" wrote...

Let me be sure that I understand what you are saying.


If you are having trouble with my English, try these...
(Full book titles, authors and ISBN numbers at bottom)


quote ref=Electronics For Engineers, page 11
Amplification This essential process involves an increase
in the amplitude or size of a signal without any change
to the waveform.
/quote


quote ref=Electronics 2, page 114
the input and output will have the same waveshape.
/quote


quote ref=Electronics Servicing Vol2, page 61
we ideally require the output signal to be a faithful but
magnified replica of the input signal.
quote


If that is your position then that is utter bovine, canine, feline and
any other *ine excrement you wish to use.

Tell it to the authors of those books, but you had best consider
their qualifications and experience first.


The only way the output waveform is equal to the input waveform is
when the stage is at unity gain

I have the choice of accepting the word of several well qualified
and experienced lecturers and engineers, or someone on a CB newsgroup.
Tough call... can I think about it?

period.

1/f

A waveform of any continuous time varying signal is defined
as a set of intantaineous points versus time that represent
that signal.

At the input of an amplifier, you have a single frequency signal...
10mV @ 1Khz
The waveform is...
sin 2pi f t

The signal at the output is amplified...
100mV @1KHz
The waveform should now be
sin 2pi f t

That is assuming a perfectly linear amplifier. We both
agree that perfection doesn't exists in this world.
Transistors are not perfectly linear but, with good design,
an amplifier can get pretty damn close.


Generally distortion results in harmonics and other
highfrequency components of the signal.

Distortion of a waveform will add components at other
frequencies.
Pure amplification is not a distortion, it does not add any
extra frequency components to the signal and does not
change the waveform.


+++The question is whether "Telstar" and "well designed" go together.
+++I would like to see an independent review from someone without
+++an axe to grind.
************

Now that will depend on examination of the product.

That was the whole idea, it was also the suggestion that Frank
made... only I find it hard to believe he would be objective. He
appears to have issues with Brian.


Regards,
Peter.


Book references (author quals. as at print dates)

Electronics 2,
D. C. Green MTech, CEng, MIEE
(Engineer for BT and Ministry of Defence, Senior
Lecturer at Willesden College of Technology).
Longman Scientific & Technical
ISBN 0-582-24519-2

Electronics For Engineers.
R. J. Maddock (Former principle lecturer,
Southampton Institute of Higher Education)
D. M. Calcutt (Senior Lecturer, School of Systems
Engineering, University of Portsmouth).
Longman Scientific & Technical. (UK)
ISBN 0-582-21583-8

Electronics servicing Vol 2
K. J. Bohlman. I.Eng, F.S.E.R.T, A.M.Inst.E.
(Senior Lecturer, North Lincolnshire College)
Dickson Price Publishers Ltd. (UK)
ISBN 0 85380 191-6
(C&G 224 core studies reference)