Hi,

I am looking for some help in understanding amplifier concepts (solid
state only) and product specifications. I have searched for
definitions and essays on the topic, but , having no electronics
exposure, I find it hard to understand the concepts clearly. So if
someone can please help:

1. What actually is amplification of a RF signal: is it the scaling up
of the amplitude?


I want to amplify a signal where the output has very low distortion
and noise. It should be as close to the input signal as possible:

2. Does push-pull setup mean that it's a class AB amplifier in which
two amplifiers amplify the same signal, but the opposite two halves of
the input signal?

If this is true, in an amplifier like this:
http://www.communication-concepts.com/ar347.htm

If two solid state amplifiers are rated at 600W each, and it's a push-
pull arrangement, how come the output of this amplifier is 1000 watts
(or 1.2 kw theoretically)
If one Motorola amplifier is amplifying half the signal, the other
amplifying the other half, wouldn't the total output be 600W for the
whole signal?


3. In class AB amplifiers, is the output signal an exact replica (but
amplified) version of the input signal?

4. What is an octave when dealing with amplifiers?


5. Is this communication concepts HF 1000 watt amplifier a class A,
class AB, or class C amplifier?
http://www.communication-concepts.com/ar347.htm

6. Does anyone know the detailed specs for this same communication-
concepts 1000 watt HF amplifier?
Specs like:
a. Duty cycle
b. Phase stability
c. Phase change with power
d. Gain flatness
e. Pulse droop
f. Harmonics
g. Spurious
h. Rise/fall times
i. VSWR or load SWR
j. Gate delay



7 Can this amplifier be "controlled" to give graded amplification less
than 1000 watts specified, or will it work only at this maximum level?

Any help is appreciated.

Thanks

Vijay