Dane,
I am fairly certain that we used both in the US and that the Motorola system
was slightly more common in the end,
but it was never controlled as you said and that likely hurt its chances to
succeed. However, FM really took off
here in the 80's and 90's and that also probably hurt and ma
The recording is interesting. This recording does show AM stereo's
capabilities, but I have heard better audio
from receivers using a wider bandwidth, and of course this recording is getting
some adjacent channel interference
as well which would make a wider bandwidth less effective. While lo
I haven't had a listen to your file yet, I haven't had a chance.
I should think that your question regarding the stereo signal would very much
depend on the method of AM Stereo used.
The method used in Australia had a 25HZ tone broadcast along with the signal
thus - and yep it does work - so lo
Dane,
I note nobody has come back on the DropBox link I posted, details below:
https://dl.dropboxusercontent.com/u/7644179/A.%20M.%20stereo.zip
file name: A. M. stereo.zip
I would have thought somebody must have heard this, so why no comments?
I am interested to know what happens when a little
Behalf Of Dane
Trethowan
Sent: Wednesday, April 09, 2014 04:41
To: PC Audio Discussion List
Subject: Re: Stereo AM
Slight corrections required here .
AM Stereo was "Pushed" for cars and I can tell you exactly which manufacturers
were paid to put
Stereo AM into their products as I wa
arry Chapman
>
> - Original Message -
> From: "Alexandra Grünauer"
> To: "'PC Audio Discussion List'"
> Sent: Tuesday, April 08, 2014 2:44 AM
> Subject: RE: Stereo AM
>
>
> I think it's important if you want to b
t'"
Sent: Tuesday, April 08, 2014 2:44 AM
Subject: RE: Stereo AM
I think it's important if you want to broadcast long distance, especially in
countries like the USA, Canada or Australia where there are people who don't
live in the range of many FM stations.
Alexandra
On 06/04/2014 13:28, Colin Howard wrote:
> Greetings,
>
> I have absolutely no idea what system is being used in the files, DropBox
> link for which is below, all I can tell you it in the UK A.M stereo has
> never taken off, I am unaware what, if any serious experiments have been
> carried out ove
pc-audio.org] On Behalf Of
> Anders Holmberg
> Sent: Monday, April 07, 2014 6:32 PM
> To: PC Audio Discussion List
> Subject: Re: Stereo AM
>
> Hi!
> But why in the world use AM at all?
> Just curious as i live in Sweden where we don't have much radio stations
> running.
to encode the stereo separation signal.
>
> Barry Chapman
>
> - Original Message -
> From: "Dane Trethowan"
> To: "PC Audio Discussion List"
> Sent: Sunday, April 06, 2014 12:46 PM
> Subject: Re: Stereo AM
>
>
> Now a question for you
, April 05, 2014 11:21 PM
To: PC Audio Discussion List
Subject: Re: Stereo AM
Hi Dane,
>From Wikipedia:
C-QUAM is the method of AM stereo broadcasting used in Canada, the United
States and most other countries. It was invented in 1977
by Norman Parker, Francis Hilbert and Yoshio Sakaie, and
Greetings,
I have absolutely no idea what system is being used in the files, DropBox
link for which is below, all I can tell you it in the UK A.M stereo has
never taken off, I am unaware what, if any serious experiments have been
carried out over here.
The archive file, link for which is below, c
. I do remember some
> mention of the Harris system back in the 80s.
>
> Barry Chapman
>
> - Original Message -
> From: "Dane Trethowan"
> To: "PC Audio Discussion List"
> Sent: Sunday, April 06, 2014 2:42 PM
> Subject: Re: Stereo AM
&
ssion List"
Sent: Sunday, April 06, 2014 2:42 PM
Subject: Re: Stereo AM
Okay fine and I appreciate you looking this up in Wikipedia however not
everything on Wikipedia is accurate, I know someone else who
is well informed on this topic and - whilst I'm not disputing the standard used
nal Message -
> From: "Dane Trethowan"
> To: "PC Audio Discussion List"
> Sent: Sunday, April 06, 2014 12:46 PM
> Subject: Re: Stereo AM
>
>
> Now a question for you, is this the Motoroller standard? If so then yes,
> that's the main one used
UAM uses quadrature amplitude
modulation (QAM) to encode the stereo separation signal.
Barry Chapman
- Original Message -
From: "Dane Trethowan"
To: "PC Audio Discussion List"
Sent: Sunday, April 06, 2014 12:46 PM
Subject: Re: Stereo AM
Now a question for you,
-
> From: "Gary Schindler"
> To: "PC Audio Discussion List"
> Sent: Sunday, April 06, 2014 11:52 AM
> Subject: Re: Stereo AM
>
>
> Maybe the Melbourne station used SeQuam like the system that was adopted in
> the states. Stereo separation was prett
> Barry Chapman
>
> - Original Message -
> From: "Gary Schindler"
> To: "PC Audio Discussion List"
> Sent: Sunday, April 06, 2014 11:52 AM
> Subject: Re: Stereo AM
>
>
> Maybe the Melbourne station used SeQuam like the system that was
Yes, Australia used the C-QUAM standard for AM stereo.
Barry Chapman
- Original Message -
From: "Gary Schindler"
To: "PC Audio Discussion List"
Sent: Sunday, April 06, 2014 11:52 AM
Subject: Re: Stereo AM
Maybe the Melbourne station used SeQuam like the system
here
now. If KDKA can't make a go or looses interest in the newest form of
transmission, the others follow suit.
- Original Message -
From: "Dane Trethowan"
To: "PC Audio Discussion List"
Sent: Saturday, April 05, 2014 8:26 PM
Subject: Re: Stereo AM
I think
-----Original Message-
>> From: Pc-audio [mailto:pc-audio-boun...@pc-audio.org] On Behalf Of Evan
>> Reese
>> Sent: Saturday, April 05, 2014 12:59 PM
>> To: PC Audio Discussion List
>> Subject: Re: Stereo AM
>
>> Back in the 80s when I was visitin
e said 6500, then I knew and was
>totally amazed at how good it sounded!
>Tom Kaufman
>-Original Message-
>From: Pc-audio [mailto:pc-audio-boun...@pc-audio.org] On Behalf Of Evan
>Reese
>Sent: Saturday, April 05, 2014 12:59 PM
>To: PC Audio Discussion List
>Subject: Re
Hi Dane,
Thanks for that information. I didn't know that there was stereo am.
Could you please post the direct link because all I found via google was a
guy introducing a stereo am tuner, announcing that he would play it and then
stopping after a quite boring show of unwrapping the thing:
http://
Yep, that's how I used to do it back in the 80s, was a Teenager then and had no
buying power ., its a crewed way of doing it but it did work to an
extent.
Of course, that procedure you outlined very much depended on the method of
broadcasting Stereo AM.
On 6 Apr 2014, at 2:58 am, Evan Reese
an
-Original Message-
From: Pc-audio [mailto:pc-audio-boun...@pc-audio.org] On Behalf Of Evan
Reese
Sent: Saturday, April 05, 2014 12:59 PM
To: PC Audio Discussion List
Subject: Re: Stereo AM
Back in the 80s when I was visiting my parents in California, there was a
stero AM station. But I
Back in the 80s when I was visiting my parents in California, there was a
stero AM station. But I didn't have any stereo AM receivers. But I did have
two portable radios. I discovered that if you tuned them just right, you
could get the stereo sound.
Evan
- Original Message -
From: "D
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