Roger G3XBM's (Mainly) Amateur Radio Blog

Yesterday, I tried 12m QRP FT8 as an experiment. It was not as busy as 10m, but I was still spotted widely. More stations spotted me than I ...

It is years since I did optical experiments. My current plan is to do some local tests with QRSS bouncing off buildings. If these are succes...

It is many years since I last used this program. It runs under Windows and allows a spectrum view in narrow bandwidths. I used it both for V...

Spectran is a very easy package to use but it has its limitations when analysing weak audio signals. A more powerful package is DL4YHF's...

There are some very neat ideas for simple LF receivers around that make use of programs like Spectran or Argo effectively as the second IF a...

Possible weak 481THz reception at 7.6km NLOS This evening I tried a 7.6km non line-of-sight (NLOS) path between Burwell and Newmarket He...

QRSS3 signal at 3.6km by non line-of-sight cloudbounce Armed with my simpler QRSS3/CW beacon (see earlier post) I did a very successfu...

Spectran screenshot of 481THz "treebounce" test 30.1.12 Last night I made my first recordings of my optical beacon in action. ...

Usually free Spectran software is used here to see VLF signals when doing my earth mode tests. However it also makes a very useful add-on to...

Just received a special build of Spectran from Alberto I2PHD that keeps the same filename for captured grabber images. This means I can now...

This evening I was able to copy G3XIZ on 136.5kHz CW at 559 using my deaf (at 136kHz) FT817 fed from my 20m base earth electrode "ante...

My earth mode VLF DX increased to 3.6km today using QRSS3 and a PC running Spectran. TX was 4W into 20m separated electrodes in the ground....

Today I modified my VLF TX so it could send either a 10 wpm or QRSS3 beacon signal. I also went out into the fields with my loop/preamp and ...