Thanks for calling this out, Ian. I checked, and discovered that DF4UE
is running "minimal" validation. I'm sure this is an oversight on his
part, and have just sent an e-mail to him suggesting he adopt the
recommended RBN standards of "normal" validation on CW and "aggressive"
on RTTY. Recent tests confirmed that "aggressive" validation on RTTY
results in usefully better spot accuracy with only a small reduction in
the raw number of spots.
73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Network at
<http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 3/23/2016 4:28 AM, Ian White wrote:
K6LL wrote:
In my experience, the VE3NEA RTTY Skimmers are much improved
lately on spotting stations that are actually calling CQ. I
always connect to a CC-Cluster node, using CC-user Software,
which seamlessly feeds N1MM Logger. I think the CC Clusters do
some filtering to validate spots from multiple skimmers. My
usual nodes are VE7CC-1 or AE5E-2.
RTTY Skimmers have definitely come of age in the past 12 months.
Many thanks to all those who are feeding the RBN, both CW and
RTTY!
The quality of RTTY skimmer spots does continue to improve, but there is
still a significant 'leakage' of spots for stations that are replying to
a CQ.
Although "CQ" can appear at both the beginning and end of a text string,
it still should not be too difficult to parse an ambiguous fragment like
"GM3W CQ K6LL". One of the two spaces in that string will be a genuine,
synchronous RTTY <space> character; but the other will just be an
asynchronous gap between two different stations.
And above all: if there is any doubt, the skimmer should *not* spot! It
isn't a race between different skimmers, and there's sure to be another
CQ coming along shortly.
Another problem last weekend was that one specific skimmer (DF4UE-#) was
spotting consistently incorrect callsigns.
73 from Ian GM3SEK (@GM3W)
-----Original Message-----
From: RTTY [mailto:rtty-bounces@contesting.com] On Behalf Of Dave
Hachadorian
Sent: 22 March 2016 23:03
To: reflector RTTY
Subject: Re: [RTTY] RTTY Skimmer
In my experience, the VE3NEA RTTY Skimmers are much improved
lately on spotting stations that are actually calling CQ. I
always connect to a CC-Cluster node, using CC-user Software,
which seamlessly feeds N1MM Logger. I think the CC Clusters do
some filtering to validate spots from multiple skimmers. My
usual nodes are VE7CC-1 or AE5E-2.
RTTY Skimmers have definitely come of age in the past 12 months.
Many thanks to all those who are feeding the RBN, both CW and
RTTY!
Dave Hachadorian, K6LL
Yuma, AZ
-----Original Message-----
From: pcooper
Sent: Tuesday, March 22, 2016 10:31 AM
To: Al Kozakiewicz
Cc: rtty@contesting.com
Subject: Re: [RTTY] RTTY Skimmer
Al AB2ZY and the group,
I have local access to a skimmer cluster as well as a normal
cluster.
Both run simultaneously here in the shack 24/7. Looking at the
skimmer cluster, I repeatedly see spots for stations that are
responding to a CQ call, rather than calling CQ themselves.
I have tried using the skimmer cluster in a contest, and that
simply clogs up the bandmap with loads of spots that aren't
calling CQ.
I know the skimmer clusters are supposed to be intelligent and
only spots calls who are sending CQ, but I see far more spots for
those that aren't.
Where cluster access is allowed in a contest, I will use the
normal cluster, as I mostly use it to gauge whether another band
is open, or worth trying. If there is some juicy DX spotted, I
may well try for them, depending on the situation, but generally,
if that juicy DX has just been spotted, it's usually pointless
trying, as loads of others will already be there.
This was evident during the BARTG contest at the weekend, as I
came across FP/KV1J calling CQ on 20m, so I tried to get in, but
he had a mini pile-up going. I did try a couple of times more,
but then he got spotted, and I gave up, as it just got silly,
with callers shouting over each other and the exchange in
progress.
Happily came across him again later, and got in first shout. It
was similar with HP3/VY2SS.
That's just my own view of things.....
73 de Phil GU0SUP
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|