Path between G4FEV and G3XBM |
G4FEV's screen shot of my QRPp QRSS3 137.766kHz beacon at 56.7km |
Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.
Path between G4FEV and G3XBM |
G4FEV's screen shot of my QRPp QRSS3 137.766kHz beacon at 56.7km |
IRF640 FET |
Lightning map of Europe http://www.blitzortung.org/Webpages/index.php?lang=en |
HA5KHC's useful website |
Tiny E-field probe on the car roof on mag-mount |
QRP earth-electrode antenna signal at 8.2km on 137kHz band |
/M RX signal at 6km orthogonal to TX antenna. |
The red dots show where the wire to my far earth rod goes - under the snow! |
ILER-40 (and ILER-20) QRP SSB kit from EA3GCY |
Peace of mind 3yr warranty for £27 - too good to be true? |
WSPR-X and WSPR-15
Wed Jan 16, 2013 8:23 pm
Some of you may be interested in trying WSPR-X, a new version of WSPR that includes the slow mode WSPR-15. WSPR-15 uses 15-minute T/R sequences, rather than the standard 2-minute sequences; at MF and LF it is 9 dB more sensitive than WSPR-2, decoding signals as weak as -37 dB in the standard 2500 Hz reference bandwidth. WSPR-15 is not recommended for use at HF: the tone spacing is only 0.183 Hz, less than the Doppler spreading typical of many HF paths. The main intended application for WSPR-15 is for very difficult paths at 137 kHz and the new 472 kHz band. It may be interesting to try on 160 meters, as well. Note that the recommended WSPR-15 sub-band is a 25 Hz slice just above the 200-Hz WSPR-2 sub-band, i.e., 1600-1625 Hz above the standard "dial Frequency". This will be handled automatically if you set up WSPR-X in the normal way.
A brief online User's Guide for WSPR-X is posted at
http://www.physics.princeton.edu/pulsar/K1JT/WSPR-X_Users_ Guide.pdf ,
and the Windows installation file is posted at
http://physics.princeton.edu/pulsar/K1JT/WSPRX_07r2948.exe .
At present, WSPR-X does not support I/Q audio (for use with direct conversion receivers and transceivers) and does not do “band hopping”. Otherwise most familiar WSPR features are present and working well.
For software enthusiasts: Unlike older versions of WSPR, the user interface of WSPR-X is written in C++ and the Qt programming framework. My expectation is that this shift will make for easier development and program maintenance in the future. At present a click-to-install package is available only for Windows. Source code for WSPR-X is available from the open-source SVN repository at berlios.de. Anonymous checkout of the full WSPR-X source code can be accomplished with the command svn co svn://svn.berlios.de/wsjt/branches/wsprx
User comments, suggestions, and bug reports will be very welcome!
-- 73, Joe, K1JT
QRSS and CW beacon TX for 137.685 kHz |
Brazilian QSL card received via www.eqsl.net |
http://www.universal-radio.com/catalog/hamhf/3071.jpg |
http://www.qsl.net/g3pto/OXO.gif |
http://www.jayceecoms.com/images/Kenwood-ts990s-1.jpg |
Unique WSPR spots in the last 2 weeks on 472kHz |
Albrect AE2990 multimode |
My current 472kHz earth electrode "antenna" - can you see it in the grass? |
472kHz RX spots on Marconi antenna |
472kHz TX spots on Marconi antenna |
472kHz WSPR reports with earth electrode antenna with wire on the lawn |
The new TS990 from Kenwood |
Reports in just one 2 minute WSPR time slot with 100mW ERP on 472kHz |
472kHz earth electrode "antenna" system in garden |
Analysis of signal levels with short Marconi and Earth Electrode antenna at 472kHz |
Image on G3XTZ's Radio Museum website |
Image on G3XTZ's Radio Museum website |
Signals received on 472kHz WSPR using the earth electrode "antenna" |
Some of the TX reports this afternoon with the 472kHz earth electrode system |
50 unique reports on 472kHz WSPR so far with 10mW ERP |
QRP JT9-1 QSO with G3ZJO today on the 472kHz band |
14 unique stations reporting my QRPp WSPR today on 474.2kHz |
So far today my 500uW has been spotted by 2 stations (see table).