Apr 17

Bob Wilson N6TV did some analysis using new columns in the raw data archived by the Reverse Beacon Network.

We finally have an answer to that age old question, “So, how fast do people send Morse code in CQ WW CW?”

Answer:  about 30 WPM

Shown below is the average CW speed of all the RBN spots, by continent (of the DX).
Those African DXpeditioners really know how to QRQ (especially EF8U).  And yes, most slow down a bit on Sunday, even if conditions improve:
          2013 CW WW CW, Saturday
        ——– Speed (WPM) ——-
Cont    Max    Min      Avg   StdDev       Spots
  AF     53      8     34.0      4.3       61908
  AS     47      5     30.7      4.1      230858
  EU     53      2     31.0      3.7     1589355
  NA     56      1     31.0      3.9      777345
  OC     40      7     30.1      3.6       30040
  SA     49      4     31.8      4.2      125039
—-     —     —     —-     —-     ——-
 Tot     56      1     31.1      3.9     2814545
 
          2013 CW WW CW, Sunday
        ——– Speed (WPM) ——-
Cont    Max    Min      Avg   StdDev       Spots
  AF     50      6     32.8      4.3       66471
  AS     47      2     30.2      3.9      228414
  EU     51      2     30.2      3.6     1617231
  NA     51      2     29.9      3.6      847843
  OC     41      5     29.7      3.3       31363
  SA     47      6     31.4      3.8      137678
—-     —     —     —-     —-     ——-
 Tot     51      2     30.2      3.7     2929000

 

 

rbn

The RBN collects data from receivers around the world and stores it into a database. These reports include call, frequency, signal-to-noise ratio, and CW speed. More information about the Reverse Beacon Network is available at http://www.reversebeacon.net/

Thanks to N6TV for sharing his analysis.

Apr 13

Everyone who submitted a log for the CQ WW DX Contest SSB 2013 has been mailed an encrypted link to view their Log Checking Report for the contest. The reports were sent to the email address that submitted the log and to any email address included within the log (using the EMAIL tag).  If you have not received your report, please check your spam filters. You can request the link by sending an email to questions@cqww.com.

You can view a sample Log Checking Report here: k5zd.rpt

Some statistics from the log checking process:

8,482 logs total
5,551,137 qso total
 228 different countries
 58,328 ( 1.1%) qso with unique calls
 29,914 (51.3%) unique calls busted 
 45,380 ( 0.8%) dupes
 443 ( 0.0%) Cabrillo format errors
4,547,210 (81.9%) qso checked against another log
4,416,925 (97.1%) qso checked good against another log
 73,173 ( 1.6%) busted calls
 19,108 ( 0.4%) busted exchange
 38,004 ( 0.8%) not in log

It is rather remarkable that almost 82% of the 5 million contacts reported were able to be cross checked with other logs. Thanks to everyone who submitted a log and helped make this level of cross checking possible. Even more amazing is that 97.1% of those contacts cross checked as being good.

The log checking report provides full details on how the final score for each entry was calculated.  It shows the raw score before checking and the reductions. Each Not-In-Log, busted callsign, and busted exchange are listed.

Unique QSOs are also listed for information purposes.  A unique QSO is one with a callsign that was not reported by any other station.  Over half (51.3%) of these were found to be busted calls.  But, experience says these unique QSOs are probably bad calls more than 90% of the time.

We have introduced a new Error Rate calculation to the reports this year. This number represents the percentage of contacts that were found to be in error. It does not include duplicate QSOs. This number is a more accurate representation of accuracy than looking at the percent score reduction, which can be much higher for smaller logs where the penalties and lost multipliers can have a higher impact than they do for large logs.

You can see the Error Rate number as part of the score summary section.

    1.3% Score reduction
    0.3% Error Rate based on claimed and final qso counts
       5 (0.2%) calls copied incorrectly
       0 (0.0%) exchanges copied incorrectly
       0 (0.0%) band change violations
       6 (0.2%) not in log
      15 (0.5%) duplicates (Removed without penalty)
       1 (0.0%) calls unique to this log only (not removed)

The average Error Rate for all logs was 3.60%. Use the chart below to see how your error rate compares to others. The blue lines show the number of logs with that error rate. The red line shows the cumulative number of logs at that error rate or lower. Someone with a 9% error rate was in the top 73% of all entries.

wwph13_error rate chart

 

Error Rate Count Cumulative % of all entries
<1.0% 2360 13.91%
2.0% 2237 27.10%
3.0% 1952 38.61%
4.0% 1614 48.12%
5.0% 1218 55.30%
6.0% 998 61.18%
7.0% 830 66.08%
8.0% 735 70.41%
9.0% 575 73.80%
10.0% 515 76.83%
11.0% 446 79.46%
12.0% 340 81.47%
13.0% 325 83.38%
14.0% 295 85.12%
15.0% 263 86.67%
16.0% 211 87.92%
17.0% 229 89.27%
18.0% 157 90.19%
19.0% 147 91.06%
20.0% 138 91.87%
21.0% 118 92.57%
22.0% 87 93.08%
23.0% 91 93.62%
24.0% 89 94.14%
25.0% 93 94.69%
26.0% 55 95.01%
27.0% 55 95.34%
28.0% 58 95.68%
29.0% 43 95.93%
30.0% 48 96.22%
31.0% 47 96.49%
32.0% 47 96.77%
33.0% 43 97.02%
34.0% 38 97.25%
35.0% 32 97.44%
36.0% 27 97.59%
37.0% 28 97.76%
38.0% 19 97.87%
39.0% 20 97.99%
40.0% 28 98.15%
41.0% 19 98.27%
42.0% 10 98.33%
43.0% 13 98.40%
44.0% 19 98.51%
45.0% 19 98.63%
46.0% 11 98.69%
47.0% 15 98.78%
48.0% 15 98.87%
49.0% 11 98.93%
50.0% 10 98.99%
>50.0% 171 100.00%

Please send any questions or comments to questions@cqww.com.

Feb 7

The table below lists the number of entries for each category in the CQ WW DX Contest SSB 2013.

1500 W 100 W 5 W Total
Single Op All Bands 960 2104 118 3182
Single Op Single Band
(160, 80, 40, 20, 15, 10)
489 1049 134 1672
Single Op Assisted All Bands 974 765 24 1763
Single Op Assisted Single Band
(160, 80, 40, 20, 15, 10)
472 396 49 917
Overlay – Rookie (All Bands) 29 227 256
Overlay – Classic (All Bands) 295 500 795
Multi-Op Single-Transmitter 375
Multi-Op Two-Transmitter 115
Multi-Op Multi-Transmitter 68
Checklog 376

There were a total of 8,468 logs submitted this year – a new record.

This is the first year for the Overlay categories.

 

Nov 15

It was an exciting surprise when Dmitri, RA9USU, appeared in the CQ WW DX Contest SSB 2013 from 7O2A in Socotra Island in Yemen. This was a rare one!

The country files used by the most common logging software have Yemen in Asia and zone 21.  The operator at 7O2A was sending zone 37.

As the logs came in, we needed to make a decision on how to score contacts with 7O2A. Is it zone 21 or 37? Is it Africa or Asia?

A little research about Socotra revealed:

  • WAC says Asia, based upon an RSGB request in 1954
  • RSGB Prefix Guide (2012, G4BWP) says Africa
  • RSGB IOTA says Africa, AF-028
  • Wikipedia says it ‘may be considered to be in Africa’

Given the above, we have decided to score Socotra island as zone 37 in Africa.  The country files used to perform the log checking have been set to score 7O2A this way.

Since the operator sent zone 37 for every QSO, anyone logging 7O2A in zone 21, will have an exchange error and lose the contact.

If you are interested in learning more about the unique environment found only on Socotra, please see this article by National Geographic (http://ngm.nationalgeographic.com/2012/06/socotra/white-text) and accompanying photographs (http://ngm.nationalgeographic.com/2012/06/socotra/melford-moffett-photography).

 

Socotra Island

 

 

« Previous Entries