On 6/30/07 8:29 PM, in article f6772q$aot$1@nnrp.linuxfan.it, "John Smith I"
<assemblywizard@gmail.com> wrote:

> Don Bowey wrote:
>
>> ...
>> This will not happen in a properly designed transmitter. It is not a
>> characteristic of AM.
>>> In fm, it is not unusual for a small "amplitude modulation" to be
>>> generated, as the varying/spanning of freq(s) is caused by the
>>> modulation, some changes in fm carrier can be generated.
>>>
>>> In an imperfect world, nothing is "perfect."
>>>
>>> Regards,
>>> JS
>>
>
> Listen to a "strong--pure am signal" on an fm receiver, turn up the
> volume on the fm receiver, something is responsible for that ... repeat
> experiment with the reverse ... "imperfect world theory" proof!

You are hearing the effects of the sidebands, not the Carrier.

>
> In new equip (I started out decades ago, remember) voltage regulation,
> filters, suppressors have much improved ... digital processing is king
> and allows what analog never could achieve ...
>
> Regards,
> JS

In a properly designed transmitter the Carrier amplitude does not change
with modulation. I have better tools than FM receivers to prove that fact
and theory agree for AM.