[CQ-Contest] 40m "new" approach to staying in the band?

[Zack Widup]

That's what I thought. Since the US phone band for 20m is 14150 to 14350,
the USB signal components are all within the band if you're set at 14150.5.
Also, assuming most people's voices don't have any significant components
below 100 Hz, the spectrum would be even a little higher.
73, Zack W9SZ


On Sat, Nov 7, 2009 at 12:38 PM, DF3KV <df3kv at t-online.de> wrote:

> Transmitting on a trx readout of 14.150.5 with 2.7kHz bandwidth in USB
> means
> that the transmitted signals appears from about 14.150.5 to 14.153.2.
> The LSB signal stays well within the band limit and is suppressed anyway.
> An USB signal on 14150.0 is already completely out of band!
> The safe limit to transmit USB on 20m will be about 14.347.3
>
> 73
> Peter
>
> -----Original Message-----
> From: cq-contest-bounces at contesting.com
> [mailto:cq-contest-bounces at contesting.com] On Behalf Of Zack Widup
> Sent: Samstag, 7. November 2009 18:10
> To: CQ Contest
> Subject: Re: [CQ-Contest] 40m "new" approach to staying in the band?
>
>  I don't quite get the complaint about 14150.5. Is it that MOST of the RF
> is
> in the band but the suppressed sideband may yet still be there? If you
> could
> be guaranteed of only a USB signal being there, it would not be illegal to
> use this frequency on USB. I listened to several SSB signals on 20m and
> switched to the LSB position and couldn't hear a thing. So I assume they
> were suppressed below the minimum requirements. That's easy to do with
> today's rigs.
>
> 73, Zack W9SZ
>
> On Fri, Nov 6, 2009 at 9:01 PM, DF3KV <df3kv at t-online.de> wrote:
>
> > Hi Mark,
> >
> > That is exactly what I wanted to point out.
> > Working LSB on 7125.5 or USB on 14.150.5 makes your transmission illegal.
> > During the recent WWDX many stations were operating outside their
> frequency
> > allocations, 14149kHz was busy all the time.
> > I also heard many Europeans working US stations above 3.8MHz which is
> > illegal either.
> >
> > 73
> > Peter
> >
> > -----Original Message-----
> > From: kd4d at comcast.net [mailto:kd4d at comcast.net]
> >
> > LSB on 7125.5 is DEFINITELY outside the US phone allocation.  This is the
> > opposite
> > of the situation of USB on 14.150.5.  USB means most of the RF is ABOVE
> the
> > suppressed carrier frequency (the displayed frequency);  LSB means most
> of
> > the RF is BELOW the suppressed carrier frequency.
> >
> > In the US, these aren't band plans as they are in many other countries
> > but regulations.
> >
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> >
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