Hi Stefan,
sorry, only just started the RX before 7 UT. So
here's your decode, delayed by 10 minutes...
2012-09-22 07:10 DK7FC
0.137429 +12 0 JN49ik
1 DF6NM/8 JN59nj 175 91
The offset was shown as DT = -0.5 so timing is
perfect.
As you said, slow DX work should be split band. From
here I would send close to the Eu slot, for example in a 10
Hz subband from 136.155 to 136.165 kHz. And perhaps 137.765 to 137.775
kHz for TA west-to-east, which would be in a DCF39 gap. This setup
would also allow to merge the accelerated output with the "normal
WSPR" band 137.4 to 137.6 kHz.
Best 73
Markus, DF6NM
Sent: Saturday, September 22, 2012 3:00 AM
Subject: Re: LF: Experimental software for WSPR-8 and
-32
For those interested, the slowWSPR utilities
can be downloaded at
There is a readme file which will hopefully give
you an idea of how to proceed. But beware, this is all very improvised, please
don't expect plug and play...
Best 73,
Markus (DF6NM)
Sent: Friday, September 21, 2012 2:07 AM
Subject: WSPR-8 Test
First decodes using 8-minute
WSPR:
2012-09-21 00:00 DK7FC
0.137508 +7 0 JN49ik
1 DF6NM JN59nj 175 91
2012-09-20 23:52 DK7FC
0.137508 +3 0 JN49ik
1 DF6NM JN59nj 175 91
2012-09-20 23:44 DK7FC 0.137508
-4 0 JN49ik 1
DF6NM JN59nj 175 91
Between 23:36 and 23:43:20, Stefan was
transmitting 8-times slow WSPR with low power on 136172 Hz. This was
recorded here to an IQ file using SndInput from DL4YHF, and replayed 8x
fast during the next 2-minute slot, starting 23:44. In the process the
audio was frequency shifted from 670 to 2000 Hz, and added to the normal
audio data for WSPR. Thus with the 4x acceleration, Stefan's
transmission appeared 8 instead of 2 Hz above center.
This is all still a bit improvised, but the
concept seems to work.
Best 73,
Markus (DF6NM)
