[RTTY] SO2R

Tue Sep 29 10:06:53 EDT 2015

I like the idea of modular messages.

What I often do when I am in s&p is to send my callsign after my exchange
if i beleive the other station have my callsign wrong.  Otherwise, I dont't
send it.  Many times during the weekend, the OM took time to change my
callsign before closing the QSO.

73, Martin

2015-09-28 16:52 GMT-04:00 Ed Muns <ed at w0yk.com>:

> Of course.  The more times you send each other's call sign, the more
> certain that you have it correct.  Where do you draw the line on how many
> times you verify the other station's call?
>
> Almost no one does this in CW or SSB and we seem to be satisfied with our
> NIL or busted call results.  Achieving an error-free log check report is a
> poor trade-off between accuracy and rate.  Every moment in every contest is
> a slightly different situation where the operator needs to apply judgment.
>
> This is a good example of why I suggest a modular message structure.  The
> vast majority of time, sending his call again in the TU/CQ message is a
> waste of time.  Therefore it should not be included in the basic message.
> If a situation warrants adding it, however, all it takes it tapping the
> <HIS CALL> key prior to the TU/CQ message.
>
> Ed W0YK
>
>
> On Mon, Sep 28, 2015 at 4:28 PM, David G3YYD <g3yyd at btinternet.com> wrote:
>
> > Simple it is the last opportunity that he has to ensure I have his call
> > correct (I lose points for incorrect call) and for that station if he has
> > QRM to know I have successfully worked him. In a busy contest I find it
> > saves working a dupe later on because I am not in his log as he did not
> > have confirmation I had worked him that first time. It also reduces the
> not
> > in log count again I lose points.
> >
> > In a quiet contest it is unnecessary as QRM is so much less, but then you
> > have more time between QSOs so may as well leave it in.
> >
> > So bottom line it can be left out but the risk is more busted calls and
> > NIL. It is a trade off a bit longer (about 1.5 seconds) against lost
> points.
> >
> > 73 David G3YYD
> >
> > -----Original Message-----
> > From: RTTY [mailto:rtty-bounces at contesting.com] On Behalf Of Ken K6MR
> > Sent: 28 September 2015 20:18
> > To: rtty at contesting.com
> > Subject: Re: [RTTY] SO2R
> >
> > I’m still relatively new at this so the answer to this question may be
> > “we’ve always done it this way…”
> >
> > After GM3XXX sends his exchange, why do you send his call again (GM3XXX
> TU
> > M7T QRZ) ? You sent his call, he responded, so you have the call correct.
> > Seems like wasted bits and time. And if that TU message gets garbled the
> > other station might think you have the call wrong.  A simple TU M7T QRZ
> > would appear to be enough.
> >
> > I see most people do it (I don’t) but I don’t see the reason.
> >
> > Ken K6MR
> >
> >
> >
> >
> > From: David G3YYD
> > Sent: Monday, September 28, 2015 12:24
> > To: rtty at contesting.com
> > Subject: Re: [RTTY] SO2R
> >
> >
> > As a SO2R operator the CQ call is key. If made too short, for instance CQ
> > M7T, then it does not give enough time for a complete reply to my CQ call
> > on the other radio to be made. The idea is to time it so as soon as one
> > radio has finished it is time to transmit on the other.
> >
> > As a consequence I use CQ M7T M7T M7T CQ this gives sufficient time for
> > someone to call me on the other radio with GM3XXX GM3XXX. Then there is
> no
> > apparent delay in my answer to GM3XXX and it allows me to send GM3XXX
> 59914
> > GM3XXX, While someone is calling me on the other radio in response to my
> CQ
> > call.
> >
> > Of course it falls apart if someone calls me after a CQ with M7T M7T de
> > GM3XXX GM3XXX GM3XXX PSE K which unfortunately too many people do. I know
> > my call so please do not send it and de is a total waste of time as for
> PSE
> > K enough said. If you have a call that is GM3XXX then twice is sufficient
> > if you have a short callsign like my contest call then M7T three times is
> > OK.
> >
> > Then at the end of the contact I reply GM3XXX TU M7T QRZ again
> > sufficiently long to enable someone to call me on the other radio or send
> > the exchange so I can reply to them without any apparent delay.
> >
> > I also make use of the ESC key to cut short messages on a radio so I can
> > initiate the reply on the other radio faster. So for instance CQ maybe
> > truncated so it becomes CQ M7T M7T.
> >
> > By the way if you think SO2R is complex then I also operate the radios
> > second receivers as well when a contest slows up.
> >
> > 73 David G3YYD aka M7T in contests
> >
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