Re: [TenTec] AM, was "Just noticed ..."

[Ken Brown <ken.d.brown@hawaiiantel.net>]

Yes both SSB and DSB suppressed carrier are modes defined by FCC and/or 
ITU standards. However DSB suppressed carrier mode, is not the same 
thing as adjusting the carrier level lower than 100 watts when operating 
AM with a primarily SSB rig. A 100 watt SSB rig with AM capability has 
to be run with the carrier level at about 25 watts, and the sideband 
power level adjusted to a much lower level than when running in SSB, so 
that an AM detector can properly demodulate the signal. DSB suppressed 
carrier mode requires a BFO at the receiver to demodulate the signal 
properly. The suppressed carrier on the transmitted signal is not high 
enough level for the AM detector to work without addition of the BFO power.
DE N6KB

Ron Zond wrote:
> It is. The correct name is single sideband suppressed carrier AM (SSSC AM)
> Iyt is amplitude modulation.
>
> Ron
> K3MIY
>
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of James Duffer
> Sent: Tuesday, June 13, 2006 9:39 AM
> To: tentec@contesting.com
> Subject: Re: [TenTec] AM, was "Just noticed ..."
>
>
> I was under the impression that SSB suppressed carrier is a form of AM 
> (unless modulated by a single sinusoidal audio tone).
>
>   
> > From: "geraldj" <geraldj@storm.weather.net>
> > Reply-To: geraldj@weather.net,Discussion of Ten-Tec Equipment 
> > <tentec@contesting.com>
> > To: gsm@mendelson.com,Discussion of Ten-Tec Equipment 
> > <tentec@contesting.com>,geraldj@weather.net
> > CC: ken.d.brown@hawaiiantel.net
> > Subject: Re: [TenTec] AM, was "Just noticed ..."
> > Date: Tue, 13 Jun 2006 07:03:28 -0600
> >
> >
> >
> >
> > ---------- Original Message -----------
> > From: "Geoffrey S. Mendelson" <gsm@mendelson.com>
> > To: geraldj@weather.net, Discussion of Ten-Tec Equipment 
> > <tentec@contesting.com>
> > Cc: ken.d.brown@hawaiiantel.net
> > Sent: Tue, 13 Jun 2006 15:55:01 +0300
> > Subject: Re: [TenTec] AM, was "Just noticed ..."
> >
> >     
> > > On Tue, Jun 13, 2006 at 06:42:16AM -0600, geraldj wrote:
> > >       
> > > > Some SW AM Broadcasters have been running SSB AM for years.
> > > >         
> > And you don't have the phase differences in propagation between the two 
> > side bands to
> > sound bad at times.
> >
> > 73, Jerry, K0CQ
> >     
> > > It makes sense to them, it saves electricity, it reduces adjacent 
> > >       
> > channel
> >     
> > > interference, and it's 100% compatible with the "legacy" radios.
> > >
> > > As for ham radio, it may not make sense. It does not produce the 
> > >       
> > "broadcast
> >     
> > > quality" voice that some people want. Depending upon the radio, and how
> > > it is designed and aligned, it may sound wonderful or it may sound bad.
> > >
> > > It's like many other "compatability" modes. It works, but it may not
> > > work as well as the original.
> > >
> > > IMHO if you want to join an AM net, it gives you the capability. If you
> > > want to keep alive AM as a mode, and preserve that part of the radio
> > > art, it won't.
> > >
> > > It's like CW, Ten-Tec rigs are designed to do CW well, some of the 
> > >       
> > competition
> >     
> > > is designed to do SSB well and include CW because they think they have 
> > >       
> > to,
> >     
> > > but almost no one will use it.
> > >
> > > Geoff.
> > >
> > > --
> > > Geoffrey S. Mendelson, Jerusalem, Israel gsm@mendelson.com  N3OWJ/4X1GM
> > > IL Voice: (07)-7424-1667  IL Fax: 972-2-648-1443 U.S. Voice: 
> > >       
> > 1-215-821-1838
> >     
> > > Visit my 'blog at http://geoffstechno.livejournal.com/
> > > _______________________________________________
> > > TenTec mailing list
> > > TenTec@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/tentec
> > >       
> > ------- End of Original Message -------
> >
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>
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