[Skimmertalk] Sprit Down of Skimmer

[David Robbins]

Their pileups are still big enough, they just get to work more ops who can really hear and understand them.  and they'll still get human spots, so it won't be any worse than on ssb.


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: Andy KU7T [mailto:outlook_7576758B43CACA73 at outlook.com] On Behalf Of Andy KU7T
Sent: Thursday, March 24, 2016 15:22
To: 'David Robbins'; 'Bob Wilson, N6TV'; 'Dai NAGAKURA'
Cc: 'SkimmerTalk Reflector'
Subject: RE: [Skimmertalk] Sprit Down of Skimmer

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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