[AMRadio] AM IARU Region 2 Bandplan


sbjohnston at aol.com sbjohnston at aol.com
Mon Mar 8 21:18:13 EST 2010


Bob wrote:

> All that is need for communications grade AM is 300Hz to 3KHz audio. 
Just
> use a 6db/octave rolloff at 3KHz.

True, but  DSB AM rig  modulated with 300 to 3k audio certainly won't 
fit into a 2700 Hz segment of the band -that's the problem.


Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
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-----Original Message-----
From: Larry Szendrei <ne1s at securespeed.us>
To: Discussion of AM Radio in the Amateur Service 
<amradio at mailman.qth.net>
Sent: Mon, Mar 8, 2010 2:53 pm
Subject: Re: [AMRadio] AM IARU Region 2 Bandplan


Bob Macklin wrote:
> All that is need for communications grade AM is 300Hz to 3KHz audio. 
Just
> use a 6db/octave rolloff at 3KHz.
>
> There is not much 3KHz or higher energy in the human voice.And we are 
not
> supposed to be playing music.
>
> B
All true, Bob.

But many of us enjoy listening to, and transmitting, full-fidelity
audio. The human voice DOES sound better (to our ears, at least) when 
we
do this. And if there is room on the band when we choose to operate, 
why
the heck shouldn't we?

73,
-Larry/NE1S


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