I made some software rendering pixel fonts into audio and I TXed a #qrss signal. RXed my own signal from the grabbers, plus some common British beacons on 30m. Does this count as a threefer for the #hamchallenge? (44, 46 and 48).

@hamchallenge #HC44S #HC46S #HC48S

Never not watching the #QRSS grabbers. Greetings from OK/DJ5CW/m on the bus to Budweis... #hamradio

After trying to manually correlate propagation events I saw on my #QRSS / #WSPR grabber with the solar flux data from the #NOAA #SpaceWeather Prediction Center for a while, I wrote a few lines of Perl that simply plot the current data below the grabber output... https://fkurz.net/ham/qrss/30m-24h #hamradio #propagation

@warteschleife The QRSS modes often include drawing in the waterfall. This might appeal - https://mastodon.social/@DJ5CW@social.darc.de/113528748539539627

It's using a Raspberry Pi Pico - only a few dollars.

#amateurradio #qrss

My 1W QRSS transmission on 30m right now received in Alaska by KL7L (along with S52AB, G0MBA, G0PKT, M0BMN from Europe). Amazing conditions! #hamradio #qrss

The transmitter is on air. The 3.3V GPIO via a LPF to the antenna. I see some weak traces on my own QRSS grabber, but on SA6BSS it's almost readable... 5mW or so only gets you so far 🙂 #hamradio #qrss

Finally got around to play with my Raspberry Pi Pico and the fantastic HF oscillator demo by R2BDY. I added some code to generate Chirped Hell and QRSS FSK-CW with it. A bit drifty without locking it to GPS. This will go on the air (30m) tomorrow! 🙂 https://github.com/RPiks/pico-hf-oscillator/pull/6 #hamradio #qrss #rp2040

The moment yesterday's X9.0 sunflare hit, as seen by my #QRSS / #WSPR monitor at SO5CW (KO01MW)... #hamradio

My 30m #WSPR and #QRSS monitor at SO5CW now has a sliding 24h spectrum display. Each 10 minute frame is compressed to 10 pixels - if you click on it, you'll see it in full resolution. This produces a fascinating visual overview of the band conditions, and you nicely see when which stations fade in and out. I marked a few known QRSS signals on the screenshot. Check it out: https://fkurz.net/ham/qrss/30m-24h #hamradio

Thunderstorms around the SO5CW #QRSS / #WSPR grabber in KO01MW. Hope I don't get hit 🙂. Last day in Poland for now, taking the night train to Munich in an hour :-(. #hamradio

The SO5CW 30m #QRSS Grabber (https://fkurz.net/ham/qrss/) now also runs k9an-wsprd and reports #WSPR spots to WSPRnet. In order to make this happen I had to switch to PulseAudio instead of ALSA to allow two processes to record audio at once. A little Perl script using ImageMagick creates an overlay image of QrssPiG with the WSPR spots marked on the spectrum. I still need to make the CW filter of the QCX wider, though... #hamradio #qrp

Made a somewhat usable bandpass filter for the 30m band mostly using spare parts. It has about 10db of insertion loss (I should have wound the transformer windings atop one another instead of side-by-side). I seem to be able to compensate for that with my sdr's gain, at least. I've got it centred on the qrss area. #amateurradio #QRSS

Last test drive for the SO5CW #QRSS grabber - just need to drill one hole for the SO239 jack (and of course I don't have a 16mm drill at home). RPi4 + USB sound card dongle + 30m QCX. The box happened to have a RJ45 through-feed which I am using for the power supply (5V + 12V). The RPi4 connects to the net via WiFi. It will go in permanent service from KO01MW in July. #hamradio

Last night on my 30m QRSS grabber: EA1RJ (top), W1BW (W) and VE1VDM (VDM). WSPR certainly is technically more advanced than visual QRSS, but there's a lot of excitement involved in reviewing your overnight grabs and searching for DX 🙂 #hamradio #qrss #morsecode #qrp

@df2jp Easter greetings copied with deep QSB. #qrss #hamradio

Working on setting up a QRSS grabber with a QCX and a RaspberryPi. Very easy thanks to the excellent "QrssPiG" by HB9FXX: https://gitlab.com/hb9fxx/qrsspig #hamradio #qrss

10mW QRSS from the RaspberryPi making it nicely to the TF3HZ grabber in Iceland (lowest trace). #hamradio #qrss #morsecode #qrp

@g7vkq oh that's super neat, now I'm looking at a kit...https://www.qrp-labs.com/ultimate3/u3s.html #QRSS

@F4JWJ

@M0PWX Thank you for introducing #QRSS, in my over a decade as an amateur, I hadn't heard of it.

To help promote #hamradio at the amateurradio infobooth at #fosdem.: #qrss look at the bottom line of the display: FSK #morse
Probably the most visual way to demonstrate what #radiosignals look like to a non-technical audience. @hamradio