I'm not a big contester, but I enjoy RTTY and will occasionally work a
RTTY contest for a few hours. I'm running FSK on an FT-1000MP Mk. V with
WinWarbler. Since first getting on RTTY in 2008, I've worked 319 DXCC
entities, so I think my setup is working pretty well.
I have noticed very occasionally specific stations that I am just unable
to work even though propagation and pileup size suggest they should be
easy. I have had them tell me to quit calling because they can't copy
me. Since they don't know my call, I can't be 100% certain the remarks
were directed at me, but timing suggested that they were.
In the ARRL RTTY roundup in January, this happened with a YV5. He came
back to me as KM9G a couple of times, then said there was something
wrong with my signal. Several years ago, I had the same problem with a
D44 in the CQ WW RTTY contest. In both cases, I would come back to
calling the station every so often, but never worked either one. There
have been a few other instances of this, but these are the two which
have stuck in my memory.
This is very frustrating and I wish I could figure out the cause. There
must be a subtle incompatibility of some sort. Any ideas? Thanks!
73,
John, K9MM
rtty-request@contesting.com wrote:
Date: Mon, 12 Feb 2018 16:20:04 -0000
From: "David G3YYD" <g3yyd2@btinternet.com>
To: <rtty@contesting.com>
Subject: [RTTY] Signals that don't decode
I found during the CWWPXRTTY contest at the weekend that there were some
signals with so much jitter on them that would not decode at all. They all
sounded very similar with similar shaped spectrums. I am wondering if there
is some software and in this case maybe it is radio firmware rather than a
general purpose computer software that is generating this signal.
I had one guy who kept calling me fortunately he was weak so I just kept on
running and copying others.
Does anyone know what this might be? Better still if someone has a sound
file of the TX being received then I would love a copy of that sound file to
have a look at.
Thank you for those who gave me a Q and hopefully a new prefix at the same
time.
73 David G3YYD aka M7T in contests
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