[AMRadio] AM Broadcast Quality


Larry Szendrei ne1s at securespeed.us
Tue Dec 17 10:09:50 EST 2013


> On Dec 16, 2013, at 3:12 PM, W2XJ <w2xj at w2xj.net> wrote:
>
> A good guideline is that the product of the lowest and highest modulating frequencies should equal 450,000.  That is 90 to 5 KHz, 150 to 3KHz, 166 to 2.7 KHz. That will yield the best tonal balance for the chosen bandwidth.
>
>
Great rule-of-thumb, but we need to realize there are limits as the 
bandpass gets too narrow. For example, a frequency range of 670.81 - 
670.83 Hz also meets this criterion.

73,
-Larry/NE1S


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