opcom wrote:
Not studio quality.
Studio quality AM is +/- 5KHz.

"Studio quality AM" is not a valid term. AM Broadcast has never
been up to "Studio Quality" standards, which would be _at_
_least_ 20 to 20K Hz.

AM Broadcast Band quality is 5K Hz.

+/- 3000-3500 Hz is communications quality, and fine for
AM. but we don't need more rules.

Why so wide?

SSB? 2.5KHz is fine. I am speaking up for the old iron. I do
limit my AM to +/-3KHz in the speech amp.

There is no difference at all between the audio response
necessary for SSB and AM. AM, because it has both sidebands,
will necessarily take up twice the RF spectrum for the same
audio response, but in fact 2.4KHz (400Hz to 2800Hz) is actually
*preferable* to higher fidelity audio response when the purpose
is voice communications. (Ma Bell did a bazillion studies on
this decades ago, so it is not exactly new information.)

"WB3FUP (Mike Hall)" wrote:

And voice communications requires studio quality
audio WHY

Heh heh, do we need to rub it in? (Yes, and in one word
the answer is: ego.)

--
Floyd L. Davidson http://web.newsguy.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)