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Re: LF: BINGO !! Opera decode from 477 via Delft sdr

To: <[email protected]>
Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr
From: "Graham" <[email protected]>
Date: Sun, 17 Jun 2012 00:34:53 +0100
Importance: Normal
In-reply-to: <AAB4300D4AE0479794E277BF96219978@AGB>
References: <0D4DC6EEC79B42328EDCDEFB0B10830B@AGB> <B1437962A3FA440698F7539F2178BE59@AGB> <9BC6879BA28949A9A5292FB65ACD03BD@W1KW> <AAB4300D4AE0479794E277BF96219978@AGB>
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And finally , off  air  decode  at  554 Miles  !

23:23 500 DK8KW de G0NBD Op4 554 mi -28 dB in Nr Liverpool beam 040 deg NO R


From: Graham
Sent: Saturday, June 16, 2012 8:58 PM
Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr

Ok  Geri
 
Watching  for  your  signal  off  air  on  477 at the  moment  .......just  starting  to  go  dark  , web-browser  froze , but  now  back  running  , so  am monitoring    477  via  delft  and  off air  Liverpool  at the  moment .
 
Ok, on the exciter, I use the   Racal MA1723 , which  will  run  ok  past  500 Khz  , just  checked  and  the  ROS-MF 2 mode  is   -28 dB  min  s/n 
 
Its possible  that  477.400  could  be  used  , in the  last  200 Hz  , as the  mode  is  100 Hz  wide 
 
Good  results for  you  on the  first  day !
 
73 -G.

Sent: Saturday, June 16, 2012 8:45 PM
Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr

Graham,
 
I will look into ROS, I have a SSB exciter that works down to 100 kHz which should be able to do the trick.
 
 
Thanks, 73
 
Geri, DK8KW & DI2BO
 
 
----- Original Message -----
From: Graham
Sent: Saturday, June 16, 2012 9:10 PM
Subject: Re: LF: BINGO !! Opera decode from 477 via Delft sdr

DF2JP
 
First  station  to  decode  off  air , at  -22 dB   that is  strong enough  to  use the  ROS-MF-2  data  mode  for  a qso !   , Opera  qso mode  needs  -20 dB min signal  level  ,
 
(ROS MF needs  Audio + ssb  or  SDR   tx  , but  is  MFSK  so  no need  for  a  linear PA )
 

18:44 500 DK8KW de DF2JP Op4 160 mi -22 dB in Duesseldorf with 0.4w + Umbrella,

18:44 500 DK8KW de G0NBD Op4 245 mi -29 dB in delft web sdr with 0.4w + Umbrella

 

From: Graham
Sent: Saturday, June 16, 2012 5:12 PM
Subject: LF: BINGO !! Opera decode from 477 via Delft sdr

First decode  from  477 ,  using  web-sdr  at Delft 

73 -G.

16:07 500 DK8KW Op4 -28 dB

*********** 16/06/2012 ***********

 

16:07 500 DK8KW de G0NBD Op4 245 mi -28 dB in delft web sdr with 0.4w + Umbrella

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