[Skimmertalk] Sprit Down of Skimmer

[Andy KU7T]

Has anyone contacted them yet to tell them to not use DOWN?  They are shooting themselves in the foot I guess... 

Andy
KU7T

-----Original Message-----
From: Skimmertalk [mailto:skimmertalk-bounces at contesting.com] On Behalf Of David Robbins
Sent: Thursday, March 24, 2016 3:45 AM
To: 'Bob Wilson, N6TV' <n6tv at arrl.net>; 'Dai NAGAKURA' <ndai at cameo.plala.or.jp>
Cc: 'SkimmerTalk Reflector' <skimmertalk at contesting.com>
Subject: Re: [Skimmertalk] Sprit Down of Skimmer

One of the other recent expeditions was listening down occasionally also... I thought they were doing it as a cw copying test as they had a huge pileup up from their frequency, but were easy to work if you copied the dn.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373



-----Original Message-----
From: Skimmertalk [mailto:skimmertalk-bounces at contesting.com] On Behalf Of Bob Wilson, N6TV
Sent: Thursday, March 24, 2016 01:08
To: Dai NAGAKURA
Cc: SkimmerTalk Reflector
Subject: Re: [Skimmertalk] Sprit Down of Skimmer

Sorry, I should have reviewed my own presentation <http://bit.ly/UsingRBN2015> on this subject.  See slide 22.  Briefly:

Originally CW Skimmer recognized just: "CQ", "TEST", and "QRZ"
VE3NEA later added "FD", "SS”, "NA" and "UP"

If they are listening down instead of up (can't remember *ever* seeing that done before), CW Skimmer will *not* recognize "DN" as a "CQ" and they will not be spotted much.

Thanks to K6MR for the reminder.

73,
Bob, N6TV

On Wed, Mar 23, 2016 at 5:13 PM, Dai NAGAKURA <ndai at cameo.plala.or.jp>
wrote:

> Thank you Bob , This must be my misunderstanding.
>
> Just after VK0EK started , Skimmers cannot copy them then I thought 
> Skimmer does not recognize callsign when DN(DWN) is just before 
> callsign.
>
> Now I understand algorithm .
> Many thanks
>
> Dai JF2IWL
>
>
>
> On Wed, 23 Mar 2016 16:48:08 -0700
> "Bob Wilson, N6TV" <n6tv at arrl.net> wrote:
>
> > I do not understand what you mean by "before DN letter".
> >
> > If they do not send CQ or TEST, or if they send the callsign only 
> > once every 10 minutes, or if they send "UP" at a different speed 
> > than the callsign, they will rarely if ever be spotted by a CW Skimmer.
> >
> > 73,
> > Bob, N6TV
> >
> > On Wed, Mar 23, 2016 at 11:02 AM, Dai NAGAKURA 
> > <ndai at cameo.plala.or.jp>
> > wrote:
> >
> > > World Skimmers cannot caprure VK0EK now Is CW Skimmer Server does 
> > > not acaputure callsign before DN letter?
> > >
> > > Dai JF2IWL
> > > --
> > > Dai NAGAKURA <ndai at cameo.plala.or.jp>
> > >
> > > _______________________________________________
> > > Skimmertalk mailing list
> > > Skimmertalk at contesting.com
> > > http://dayton.contesting.com/mailman/listinfo/skimmertalk
> > >
>
> --
> Dai NAGAKURA <ndai at cameo.plala.or.jp>
>
>
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