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@contesting.com
[mailto:cq-contest-bounces@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@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@comcast.net [mailto:kd4d@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.
>
> _______________________________________________
> CQ-Contest mailing list
> CQ-Contest@contesting.com
> http://lists.contesting.com/mailman/listinfo/cq-contest
>
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