DK5HH and myself had a talk at the Hamradio 2017. Unfortunately I could not travel to Friedrichshafen as I had other unplanned work related commitments. Thanks to Michael for covering! You can download the slides for the talk here: Hamradio 2017 talk WSPRlive Tweet
There are two version for the RedPitaya on the market: STEM 125-10 (10-bit ADC/DAC) STEM 125-14 (14-bit ADC/DAC) The 14-bit version is roughly 20% more expensive compared to the lower resolution version. In case one wants to operate a dedicated RedPitaya 24h/7d with SDR-WSPR, thinking about the difference in performance with repsect to receiving more wspr messages, is probably a good idea. The WSPR protocol is capable of decoding messages up to a signal to noise ration (SNR) of -28 dB (Wikipedia) with respect to a 2500 Hz reference bandwidth. Nevertheless I regularly get decodes till -31 dB. This raises...
Finally I decided to build a proper case for my SDR-WSPR installation in my garage, receiving WSPR messages as DL2ZZ. This occasion I took as an opportunity to automatically measure the PPM deviation of the 125 MHz oscillator, so I can correct for it. (more…) Tweet
Dear OMs, Occasionally the InfluxDb server crashes. Therefore I need to perform some database maintenance in the next couple of days. 73 de Clemens / DL2ZZ / PA7T Tweet
There is a pre-release of our RedPitaya WSPR 8-channel receiver application available in (more…) Tweet
Dear OMs, during a scheduled security update in the data-center we had some outage, as the webserver tried to start before the server got an IP address. Probably the DHCP server on the network issues the addresses just a tiny bit slower, now. Is fixed. 73 de Clemens / PA7T / DL2ZZ Tweet
The first version of the wsprlive.net landing page is online. Please leave comments for improvements. Tweet