Here some analysis of my recorded spots data with my spot data collector. As of today there are 45.000 spots recorded in my database.
Weak Signal Propagation Reporter
For more information check out these webpages:
- https://de.wikipedia.org/wiki/Weak_Signal_Propagation_Reporter
- https://en.wikipedia.org/wiki/WSPR_(amateur_radio_software)
- https://physics.princeton.edu/pulsar/k1jt/wspr.html
- http://www.darc.de/der-club/distrikte/g/ortsverbaende/25/anleitungen-vortraege-projekte/schnelleinstieg-in-wspr/
- http://www.amateurfunk-wiki.de/index.php?title=WSPR
- http://wsprnet.org
My WSPR data collector is now running some days and I started with some basic data analysis.
The power on the bands 60m to 20m is about 100mW!
Measurement of the signal quality of QRP-Labs U3s with low-pass filters.Transmitter output is fed into a homemade 40dB power pad. The spectrum is measured using an SIGLENT SSA3021X analyzer.
The bias voltage was about 2.6VDC and the PA voltage was abt. 7VDC.
Inspired from some work found on the Internet and the full functionality of my U3S I've build an automatic spot collector. The spot collector pulls every 5 minutes my spots from WSPRnet.org and puts it into a MYSQL database for later analysis. See the schematic for this setup