Re: What kinds of IC amplifiers would Kenwood use?

krw krw@xxxxxxxxxx posted to sci.electronics.design:

In article <cJo5j.22953$4V6.17758@xxxxxxxxxxxxxxxxxxxxxxxxxx>,
joseph_barrett@xxxxxxxxxxxxx says...
krw krw@xxxxxxxxxx posted to sci.electronics.design:

In article <474F7567.44F9DACB@xxxxxxxxxxx>,
rabbitsfriendsandrelations@xxxxxxxxxxx says...


krw wrote:

rabbitsfriendsandrelations@xxxxxxxxxxx says...
krw wrote:
rabbitsfriendsandrelations@xxxxxxxxxxx says...
Jim Thompson wrote:
D from BC <myrealaddress@xxxxxxxxx> wrote:

Perhaps audio process the original CD with software
and burn a new 'tweaked' CD.
I'm pretty sure there's audio apps that can do that.


Any AM radio station has a expander/compressor to keep
the modulation stabilized... maybe something of that
sort?

Whoooooossshhhhhhhh !

Jim's tenuous grasp on the real world is revealed all
over again.

No, radio stations DON'T use expanders actually. Nore
are FM stations immune > from the
habit of compressing the *** out of everything.

Is that why that thing radio stations use is called a
"oompander"?

It isn't.

*Dumb* Donkey!

Dumb donkey!

Find an example of level expansion in this classic example
of the beast.

http://www.orban.com/products/radio/am/9300/

You pick a particular product that fits the sky color in your
world
and want me to tell you how it works? Why don't you just look
at what radio stations actually use?

Orban's Optimod is the very pinnacle of what radio stations use
you ignorant fucking MORON.

Rado stations use COMPRESSORS, not expanders.

Is *THAT* why they're called "companders", DUMB donkey? Is that
why they have "up to 25db gain, DUMB donkey?

Graham

the DUMB donkey!


Just a question: Is it possible to do compression without adding
gain?

I don't see why not. A compressor (audio) reduces the dynamic range
of a signal, so a circuit using a non-linear passive element could
be envisioned as a compressor.

I suppose one could even build an expander using a nonlinear element
with the opposite transfer function as the imagined compressor
above. For example, a compressor could be built out of a
resistor-thermistor
divider. More power -> heat, which could be used to modify the
ratio in either direction depending on the temperature coefficient
of the
thermistor. Being passive, both would have gain less than unity.


OK. It may be doable. How many instances of doing it without gain,
compared to instances of doing it with gain can you find?

.