CW decoder by WD6CNF

[VK4TS]

I assume you are referring to Skimmers ability to decode CQ Calls and therefore end up on the Reverse Beacon network.

The optimum is to call in a sequence of at least cq or test and callsign twice - do not vary the speed (some programmes do this)

CQ CQ VK2FAD VK2FAD or CQ TEST VK2FAD VK2FAD will get the best results . During Contests on quiet bands we use a long CQ CQ VK4## VK4## repeated two times finally TEST and that usually takes care of new Skimmer spots

[VK2FAK]

Hi all....

Thats what I wanted to know...thanks for that..

I knew they had levels and a top level of a callsign file, if you were not in that you don't get spotted.......but I think you have answered the question...

Now I will pretend I was never here, I did not see anything, did not read the thread...what thread...


John

[VK4TS]

What skimmers use is the SCP file http://www.supercheckpartial.com/ which is an aggregation of active contestor's callsigns -

The Super Check Partial database files provide a list of callsigns used by active contesters. The data comes from Cabrillo logs contributed by contesters themselves. Contributed logs from the past 24 months are used to create the database. These logs are combined and filtered so that they result in a fairly good (but not perfect) list. The files do not contain any QSO data, such as state, CQ zone, Maidenhead Grid Locator, etc.

So if you work several of the USA contest stations in the WPX CW contest your callsign will be added to the SCP file. This file is used by most contesting log files as a cross check - a small window will show the most likely calls - so say in a pileup you hear KE??? When you type KE into the logger the variations of KE will be in the window - as you add more to the callsign the possible are narrowed down.

Monitoring of the RBN and calling CQ will show where you are being received and often it does surprise...

[vk1da]

My QRP sota sig was spotted by a local skimmer and reported on the rbn site. That in turn was forwarded to the SOTAwatch site. So within a minute if calling cq I saw a new spot on sotawatch telling me I was heard. I understand that system does not identify callsigns in a qso, so you have to call cq or test to be spotted.




Andrew Davis VK1DA & VK2UH
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