So the SO2R op deliberately slows every contact down by 1.5 seconds? Very
odd, considering all the past debate about extra time taken to send a single
space after a call :-)
and that's 1.5 seconds of my time too ....
John GW4SKA
----- Original Message -----
From: "David G3YYD" <g3yyd@btinternet.com>
To: <rtty@contesting.com>
Sent: Monday, September 28, 2015 9:28 PM
Subject: Re: [RTTY] SO2R
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@contesting.com] On Behalf Of Ken K6MR
Sent: 28 September 2015 20:18
To: rtty@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@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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