[RTTY] Skimmer spots dropped at VE7CC cluster node

[Jim W7RY]

Probably not. Using FSK generated by DOOK (5 KHZ AFSK) and converted to FSK
from 2-Tone.
Icom IC7600


What it really looks like is the skimmer software has poor decode. If you
look closely at the busted calls, the calls are very similar.

So more of poor decode than too close to someone. LOTS of busted calls are 
off by one
letter.




Thanks
73
Jim W7RY


-----Original Message----- 
From: Pete Smith N4ZR
Sent: Monday, October 05, 2015 3:36 AM
To: rtty at contesting.com
Subject: Re: [RTTY] Skimmer spots dropped at VE7CC cluster node

Or conceivably because of less than perfect AFSK (bit jitteror
distortion from overdrive?)

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 10/4/2015 9:18 PM, Lee Sawkins wrote:
> You get busted because you are too close in frequency and call to W7RN or
> W7DRM and they were there first.
>
> 73 Lee
>
> ----- Original Message -----
>
> From: "Jim W7RY" <w7ry at centurytel.net>
> To: "Lee Sawkins" <ve7cc at shaw.ca>, rtty at contesting.com
> Cc: dezrat at outlook.com
> Sent: Sunday, October 4, 2015 11:41:44 PM
> Subject: Re: [RTTY] Skimmer spots dropped at VE7CC cluster node
>
> So why am I in the busted list 41 times?
>
> 73
> Jim W7RY
>
>
>
> -----Original Message-----
> From: Lee Sawkins
> Sent: Wednesday, September 30, 2015 6:19 PM
> To: rtty at contesting.com
> Cc: dezrat at outlook.com
> Subject: [RTTY] Skimmer spots dropped at VE7CC cluster node
>
> These links may be interesting to some of you. These are the typical
> rejected spots of any CC Cluster.
>
> RTTY skimmer spots are considered valid if spotted by ONE Skimmer. RTTY
> Skimmers are generally more accurate than CW and there are simply not
> enough
> of them to use 2 or more Skimmers to validate them. CW spots are valid if
> spotted by 2 or more Skimmers.
>
> Here is the list of dropped Skimmer spots by the VE7CC-1 cluster.
> If you connect to the RBN directly, you will receive all these spots as
> well
> as the good ones.
>
> Many times there are two calls in succession that are dropped for RTTY
> calls. I am receiving data from both the RBN and DL4RCK for redundancy.
> Usually they both spot the same RTTY calls.
>
> Most columns are self explanatory.
>
> The number directly before a skimmer call is a quality number. It is the
> number of times a call has been detected as correct minus the number of
> times it is busted. When the number decreases below 5, it is no longer
> considered valid. If the active call has not been spotted in 12 minutes it
> is also no longer considered valid. In one place, for 9A1A the quality
> number is over 2000. This means 9A1A has been spotted over 2000 times on
> the
> same frequency!
> "Sysop added" means I have manually added a call to the list because it is
> busted all the time and is never good.
>
> http://www.bcdxc.org/ve7cc/ccc/Busted-26-Sep-2015.txt
> http://www.bcdxc.org/ve7cc/ccc/Busted-27-Sep-2015.txt
>
> Lee
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