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Old June 30th 07, 09:54 PM posted to sci.electronics.basics,rec.radio.shortwave,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless
Mike Kaliski Mike Kaliski is offline
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First recorded activity by RadioBanter: May 2007
Posts: 182
Default AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency


"Radium" wrote in message
oups.com...
On Jun 30, 3:32 am, "Mike Kaliski" wrote:

It is not possible to modulate a carrier frequency at a frequency higher
than the carrier frequency.


Why not?

I am getting conflicting answers. Some say it's possible to modulate a
carrier frequency at a frequency higher than the carrier frequency,
others say it isn't.

Who is right?

Radium

Me

Read my entire earlier reply. Then go to the library and spend several years
reading through the electronics section with particular emphasis on the
origins of electrical technology and early wireless. Then take a technical
biased university course incorporating logic and critical analysis and all
will become clear.

Without a basic knowledge of the subject, you are unable to make any form of
critical judgement as to the accuracy or correctness of what people are
telling you and all your questions become valueless because you do not have
the nous to evaluate the answers you receive.

Start with the basics and then try working up from there. Many inadvisable
things are technically possible, putting a dead short across the mains will
generate a pretty good example of electromagnetic pulse, but it is far
better to use a capacitive discharge circuit to do the same job. You could
try modulating carriers at all different sorts of frequencies to generate
harmonics, far better to use a square wave generator. You get the idea.

Regards

Mike G0ULI