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Re: LF: VK1DSH reception in France WSPR 2 on 630m

To: <[email protected]>
Subject: Re: LF: VK1DSH reception in France WSPR 2 on 630m
From: "Graham" <[email protected]>
Date: Sun, 17 Feb 2013 22:29:59 -0000
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>,<[email protected]> <[email protected]en.be> <[email protected]> <[email protected]>
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Well Ed,
 
These things  don't just  happen ,   that 500 mtr  wire  did  the  job, just as the  750 feet  to  the  lighthouse  sorted the  gb4fpr  CW contact with  vo1mrc  on 502 , with   70 watts  carrier  power  or Gary's   OP8   to  VE  on 136  , using  a  40 ft parasol  in the  back garden ..
 
From the  test  we  ran  using OP16    , 16  mins  was  too  long for  500 , Im not  100% convinced  OP8  is  , but it has  put in some  good distances , the  question  is  how much  of  a   120  wspr  tx  is  needed  to  decode  ?  TA used to  show  only  1  or  3  syc points  in the  report , indicating  events  where  quite  short ?
 
Ok only a  short  path ,  simultaneous   100%  OP4  and OP8  , the  lower  s/n is the  longer  format , not  a  big  test , but  would   point to a  un equal   qsb   cycle ?    136 is a  different  story  , the  longer  qsb gives  the  opportunity  to  increase the  tx  time , but unless  the  ' system'  can  accommodate the  time  in terms  of  stability , then its a  law of  diminishing  returns
 
22:10    477 G0NBD de G4MDH Op4 139 mi -14 dB in Wootton Bassett, SW Eng with 0.1w
22:10    477 G0NBD de G4MDH Op8 139 mi -14 dB in Wootton Bassett, SW Eng with 0.1w
22:06    477 G0NBD de G4MDH Op4 139 mi -13 dB in Wootton Bassett, SW Eng with 0.1w
22:02    477 G0NBD de G4MDH Op4 139 mi -12 dB in Wootton Bassett, SW Eng with 0.1w
22:02    477 G0NBD de G4MDH Op8 139 mi -13 dB in Wootton Bassett, SW Eng with 0.1w
21:58    477 G0NBD de G4MDH Op4 139 mi -12 dB in Wootton Bassett, SW Eng with 0.1w
21:54    477 G0NBD de G4MDH Op8 139 mi -16 dB in Wootton Bassett, SW Eng with 0.1w
21:54    477 G0NBD de G4MDH Op4 139 mi -14 dB in Wootton Bassett, SW Eng with 0.1w
 
G..
 

From: g3zjo
Sent: Sunday, February 17, 2013 9:23 PM
Subject: Re: LF: VK1DSH reception in France WSPR 2 on 630m

Hi G

Yes you were right. What I liked was decoding the 'trace in the sand', a bit more than 'just' and it was WSPR2, holds the distance record over WSPR15 on 630m. Slip one in quick when the going is good.
472KHz to the Far Flung Antipodes of Hobartly Tasmanial  BAH! you are all  MW Dreamers.

Stanley Unwinese as used by himself  to a Policeman, as an excuse for driving the wrong way down a one way street.

Eddie


On 17/02/2013 20:21, Graham wrote:
Any fool  can repeat  what  others  say  , but a lesser one  might  repeat the  whole  text  
 
So  , as  I posted ,
 
''Problem is  you  cannot  up the  time  to  down the  s/n as  you can  on 136
 
I have seen  MW  UK/VK  dx using  carrier  detection  just  behind the  gray  line , that  would  need  a  100%  carrier running  for  may  be  2  hours  round  that  time  , but the  window is  not too  big , may be  , 15/ 30 mins ?  
no chance  for  any qrss/data   , just a trace in the  sand  ? ''
 
 
 
Problem is  you  cannot  up the  time  to  down the  s/n as  you can  on 136 , >>> True ?
Its possible to   observe  signals   from  VK on MF   >>.. Ture ?
time  window  small   >> ture ?
Special  set up long carrier   (rx)  ? >>  ture  ?
Observed signal  very low out side  data >>  true ?
 
so  what  particular point  is  worth    repeating concern ? 
 
 
G..
 
 
 

Sent: Sunday, February 17, 2013 6:54 PM
Subject: RE: LF: VK1DSH reception in France WSPR 2 on 630m

Hi Stefan,

 

in 1923 wrote Paul Godley (call 2ZE): The amateur is a fool: ignoring that something is impossible, he makes it happen.

 

Maybe little has changed since then ;-)

 

73, Rik  ON7YD - OR7T


BTW i want to remember what was written here last tuesday:
Am 12.02.2013 00:30, schrieb Graham:
[...] 
no chance  for  any qrss/data   , just a trace in the  sand  ?
 
G..

Your results demonstrate once again that it is always worth to try what seems to be impossible! :-)


Am 17.02.2013 13:08, schrieb André Guyé:
What about the use of long period of TXing, as WSPR15 or QRSS ? For this very long path, I think that the opening duration time is too short for that use ?

Well first it would be interesting to get some informatiuons about Dale's TX system. And if normal WSPR-2 decoded, then QRSS-10 should be possible as well. 
WSPR-15 may take to long, the opening times are quite short, as you say. But anyway, this opens a new field for experiments. Of course it is worth to transmit during the time that path is open! And it is good that the WSPR "dial" frequency in VK is different to ours, so we already have splitted bands for RXing and TXing here in EU and VK.

 

Now, as Dale said to me in a mail, one spot is not sufficient to valid that.

Why not? If you say that you didn't use a WEBSDR or other tricks, and got a decode. Where should the information in the WSPR window come from, if not trough the RF radiated in VK?



Again, my best congratulations to this impressing result!!

73, Stefan7DK7FC

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