Yeah, I know the difference just didnt put it together. I was thinking one
and talking about another. But DSB was also used, I think, with some kind
of rtty signals with one upper and one lower supperessing the carrier in the
middle. Not sure how it was done. Didnt use much of that around the time I
was using RF for long distance communications.
You been there awhile, you staying much longer? I was amazed at seeing a
picture of HK in a restaurant here lately. Connaught Center was the tallest
building in Asia, at 54 stories, and was still being built when I first
arrived there. Now you have to look hard to find it down amongst all the
much taller buildings. I had the second highest antenna in the colony, up
in the gap(on top of a 21 story building, with Phil VS6DO up almost at the
top of the peak. He had a two story house up there, but overlooked
EVERYTHING but a few phone company antennas at the very top of the peak. How
difficult is it to get a license now? Back then you simply couldnt, unless
you lived there.
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesy I upload to eQSL but if you
use that - also pls upload to LOTW
or hard card.
moderator [EMAIL PROTECTED]
moderator http://groups.yahoo.com/group/DXandTalk
----- Original Message -----
From: "expeditionradio" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, February 01, 2007 10:43 AM
Subject: [digitalradio] re:DSB, ISB, SSB, AMSC, LSB, USB, I/Q
> > Danny Douglas N7DC wrote:
> > The best use of DSB in ham radio would be for SSTV or some
> > such. You could have the picture on one side, and voice
> > talking about it on the other.
>
> Hi Danny,
>
> That's commonly known as ISB (Independent Side Band).
>
> DSB, or AMSC, is commonly what you get when you amplitude modulate,
> and suppress the carrier. I remember some inexpensive early Trio
> (Kenwood) monoband DSB rigs in Japan in the 60's. There was a 15m and
> a 40m version, and it had no clarifier! On the air, most of the SSB
> ops didn't realize they were talking to a DSB station. My friend
> JH1GNL, worked the world on 15m with one of those rigs.
>
> There is a big problem with DSB receivers trying to receive DSB
> signals, but they do fine with SSB signals. When working another DSB
> station, if you are not exactly tuned within a small fraction of a
> hertz, the phase or beat frequency between USB and LSB will drive you
> nuts trying to listen to it. :)
>
> Bonnie VR2/KQ6XA
>
>
>
>
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telnet://cluster.dynalias.org
>
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3:16 PM
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