A new 2m barrier is broken. PY1MHZ- V51PJ QSO / article amended

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A new 2m barrier is broken. PY1MHZ- V51PJ QSO / article amended

08 October 2016 – The reported transatlantic 2 meter contact between PY1MHZ in Brazil and V51PJ in Namibia turned out to be a false alarm, based on an incorrect interpretation of screen captures from the event!

Closer Look Reveals that Reported Transatlantic 2 Meter Contact Did Not Happen. Screen captures of the protocol software were supplied to document the contact, but the software’s lead developer, Joe Taylor, K1JT, noticed debugging information, indicating that a prototype version of the protocol was being used. On closer inspection, the indicator values showed that the decodes were probably based on call sign information being known in advance, as is common with scheduled contacts.

“There was no intention to deceive,” Taylor told ARRL. “It was a perfectly honest mistake. It’s unfortunate. Many of us wish the report of such a QSO could be true — but it’s not.”

read full article here

 


Bilateral Transatlantic 144 MHz QSO made !

Between 04 and 05 October 2016 a new record was set. PY1MHZ Marcos received in the city of Rio de Janeiro, Brasil from locator GG87JC the 2 m signal of V51PJ  from locator JG82IE in Rosh Pinah, Namibia by using digital mode WSJT-X via Tropospheric ducting.

The distance between the two stations is 5987 km

Here the details of the records:
Frequency: 144.250MHz
Mode: WSJT-X – QRA64

Time and intensity:
04 OCT 2016 2038 UTC -37db at PY1MHZ

05 OCT 2016 0028 UTC  -36db at V51PJ

Rig setup:
PY1MHZ 2x12el Horizontal polarity, 400W,  Preamp 16db

V51PJ 2x13el Horizontal polarity, 1kW

Only thanks to the persistence and determination of these OM this historic achievement was possible.

We are all thankful to K1JT Joe Taylor that continuously provides to our community state of the art software.

 

 

2016-10-14T04:34:24+00:00 By |6 Comments

6 Comments

  1. Roger Rehr W3SZ October 5, 2016 at 1:01 pm - Reply

    Thanks should also go to Nico Palermo, IV3NWV who “invented” QRA64. See his paper at:
    http://www.eme2016.org/wp-content/uploads/2016/08/EME-2016-IV3NWV-Presentation.pdf

  2. wellington PY2WOT October 5, 2016 at 2:18 pm - Reply

    Parabéns !!

  3. […] Source. […]

  4. Wolfgang October 7, 2016 at 6:11 pm - Reply

    I dont see any QSO in the lines printed on the screen…

    No RRR confirmation or similar. Was it really a QSO ? 2way QSO?
    Or only a receiption or even wrong decode?

    vy 73 de DL5MAE Wolfgang

    • Andrea October 8, 2016 at 8:56 am - Reply

      It turned out to be wrong decode as per K1JT thorough inspection, although in a first query he said the decode was correct.
      We have amended out post accordingly.

      73 de HB9DUR

  5. Wolfgang October 8, 2016 at 6:41 pm - Reply

    Hi Andrea,

    thanks for the update… I thought QRA64 is a new mode without any wrong decodes..at least the
    “experts” told me so….
    Strange the first query said the decode was correct…
    Also the comment from N0AX (Ward Silver) on ARRL webpage seem non existent anymore..
    So no good news for the “DX papparazzies” …

    vy 73 de DL5MAE WOlfgang

    I dont trust in JT!

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