Roger G3XBM's (Mainly) Amateur Radio Blog

Before my 2013 stroke, I enjoyed experimenting with VLF earth-mode, which anyone can enjoy.  In the UK OFCOM is not interested in licencing ...

One of my Facebook memories was an experiment in 2011 at a distance of 6km on 1095Hz using 5W.  Later I achieved even better results. See  h...

 Before my stroke I really enjoyed experimenting with both ends of the spectrum. I quite enjoyed seeing how far I could get on VLF earth-mod...

 Someone asked for access to this file. It is now open so if you have this link you should be able to read it. It was sent to me some years ...

Earth-mode is a form of VLF communication that is open to all. With 5W I managed to cover 6km, although far further should be possible even ...

On my old website I have a blog about my experiments many years ago with VLF "earth-mode"  communications using 5W.  As the page...

Yesterday, I mentioned amateur VLF experiments below 9kHz. A very accessible introduction is earth-mode communications, especially utilit...

An amateur in Germany, DL3IKE , found this recently: https://www.cia.gov/library/readingroom/docs/CIA-RDP78-03424A000400090001-9.pdf

8.97kHz 5W TX Before my stroke in 2013 I did a fair bit of experimentation at VLF, successfully receiving quite a few European amateurs ...

Today I received a nice email from a station in The Netherlands on the subject of earth-mode communications. Apparently he had been inspired...

Well, I did my first VLF earth-mode field test today since my brain bleed in Sept 2013. Sadly, it was a total failure. I am at a loss to exp...

Today I adjusted the turns ratio on my 8.976kHz VLF QRSS3 and 10wpm CW 5W beacon to better match my earth electrodes. At this QTH they look ...

5W VLF beacon TX OK, I was only testing from the shack to the lounge, but this is a start .  TX is 5W from my TDA2003 beacon. TX frequ...

Before too long now, I hope to be able to resume driving again, following my brain bleed over a year ago. With a bit of effort, I should t...

For the last few days I have been patiently trying to find some TEP-Es on 6m WSPR, to no avail. Although 6m TEP (trans-equatorial propagatio...

This evening, I did a couple of tests on 8.976kHz earth-mode from the new QTH with my 5W beacon TX. Initially I used the far earth rod about...

I have added a page on my main website showing the VLF earth-mode beacon transmitter currently being used. In the next few days I'll ad...

As a matter of interest, this afternoon I worked out how much power I am actually radiating when carrying out my earth-mode tests. The main...

In the last few weeks I have been doing QRSS3 (slow CW) tests at approximately 1kHz, 4.48kHz, 8.97kHz and 18kHz transmitting 5W into 20m spa...

As a follow-up to my recent tests at 8.97kHz, today I repeated the QRSS3 earth-mode (through the ground) tests with my latest receiving equi...