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Old July 15th 07, 04:35 AM posted to rec.audio.tech,sci.astro,sci.physics,rec.radio.amateur.antenna,rec.radio.amateur.space
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Default George Dishman says Karl Uppiano is wrong about AM radio, carrier-frequencies, and aliasing. Who should I believe? Why?

In rec.radio.amateur.antenna Radium wrote:
George Dishman says Karl Uppiano is wrong about AM radio, carrier-
frequencies, and aliasing. Who should I believe and why?


The math; it is always correct.

He is wrong. The basis of AM is that the sine wave
carrier is multiplied by another signal which can be
treated as a sum of sines. The relevant maths is:

http://www.sosmath.com/trig/prodform/prodform.html


snip remaining idiocy

--
Jim Pennino

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