Another WebSDR? Yes. There are a lot of different SDRs after all, why another one?
I will explain it now.
I have been interested in the 160m and 80m bands for a long time. The basis for success here is "good ears". Without good receiving antennas there is no chance of success. There is no problem to be heard far away, the bigger problem is to hear what comes from far away. "You can't work them if you can't hear them!". What's more - the success consists of the whole installation, not only the radio and antenna, but also the cable, its type and arrangement, and even... the plugs used and the quality of their installation (discontinuity of the braid can cause a jump in the background noise by 2s - it's a lot - for this reason, where I can, I use crimped N and F connectors). Unfortunately it is not always possible to systematically take care of our hobby, testing various solutions, antennas, etc. Fortunately, it can be automated in some way. I run WebSDR on a separate machine. Apart from the fact that you can simply listen to what's going on in the bands - it listens to FT8. All activity is logged - every callsign, every CQ along with the level of the received signal. This, after averaging the results over a longer period, will allow you to see the directivity of the antennas, the differences between them and the variation in propagation conditions.
So far, only one antenna is connected - LOG (Loop On Ground) - a square loop of about 6m side, "pinned" to the lawn. In a straight line to the nearest "electrified" buildings it is 60m, the next buildings are about 80-100m away. The feeder is currently about 80m of triset cable for satellite installation, of course with appropriate ferrite filters. Such an antenna with +20dB preamp on in my KX3 gives a background of about 1s-2s on 80m. I don't think I need to describe how impressive it is to search the band, where from such a background you can find a station with a signal at the S9 level.
The receiver is an RSP1A and OpenWebRX software. The preamp turned out to be unnecessary (and harmful in some situations), bandpass filters - it seems that the ones the RSP1A has built in are sufficient.
If you have any questions - please leave a comment. Enjoy listening!
Update: the software now runs additionally on a great websdr from PA3FWM. Additionally - due to lack of SSL support - websdr has been moved to new address.
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