[AMRadio] AM power

[Jim WB5OXQ inb Waco, TX]

Sounds like digital am similar to what the Harris DX series transmitters do. 
There is no modulator amplifier just a analog to digital converter turning 
off and on the rf stages in step with the audio.  I know these are very 
efficient, cool running and have wonderful fidelity to the audio compared to 
a plate modulated transmitter.
These run 100% carrier power during quiet audio times to better quiet the 
receiver listening to the station.  Jim Hawkins has a page explaining how 
this works.
This should be possible by using IC's on a smaller scale than a multi KW 
broadcast transmitter.  Maybe cleaner audio with less splatter too.

----- Original Message ----- 
From: "BILL GUYGER" <bguyger at sbcglobal.net>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Sunday, June 19, 2011 2:41 PM
Subject: Re: [AMRadio] AM power


> Not to be catty, but doesn't that describe Pulse Width Modulation? Key 
> down
> longer for wider pulses?
>
> Bill AD5OL
>
>
>
>
> ________________________________
> From: James Liles <james.liles at comcast.net>
> To: Discussion of AM Radio in the Amateur Service 
> <amradio at mailman.qth.net>
> Sent: Sun, June 19, 2011 12:26:55 PM
> Subject: [AMRadio] AM power
>
> Hi all:
>
> This thread has been an interesting visit to the world of perception and
> psychology.  Does anyone have any information regarding the modulation
> technique, that when applied to the STRAIGHT KEY, simulates the human or
> chimpanzee voice?  Novel idea to make use of the CW band space using a 1KW
> carrier to convey audio.  Probably need a redesign of the key click filter
> though ayh.  I think ayh is a colloquial  for what do you think.  Thought 
> a
> new idea would bring a breath of fresh air to the thread.  Seems I had a
> short circuit or cranial RF burn following this most interesting thread.
>
>
> Kindest regards and a happy fathers day    Jim K9AXN
>
>
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