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Posted to rec.audio.tech
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can radio sound be processed like this?
In article , wrote:
Karl Uppiano wrote:
The station was KCID AM in Caldwell, ID. 1490KHz/1KW. I worked there from
1978 to 1986. I don't think it's there anymore.
Google indicates otherwise, unless the pages it finds are out of date.
When I took it over, the
studio-transmitter link was 5KHz telephone lines. One of my first projects
was to install a microwave STL which gave us 15KHz bandwidth end-to-end.
Then I spent considerable effort bringing the entire audio chain up to FM
specs. My goal was to pass an FM audio proof of performance on an AM
station, and the management at the time supported this goal. We met this
goal for all of the parameters that were applicable to AM. Noise and
distortion were the most difficult parameters to keep in spec.
AM stations in the standard broadcast band are limited to 10 Khz modulation
bandwidth and therefore to 5 Khz audio bandwidth. It would seem, then, that
your station was in violation of bandwidth limitations.
I think there was some kinf of limit, at least thats the way
I herd it when I was taking getting all the Commercial FCC licenses
and playing with Ham radio. However, I also know there were stations that
went way passed that 5 kHz limit, at least some years later. I have
one AM section on a HH Scott, made in Japan receiver, that some
AM stations sound extremely good.
greg
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