Roger G3XBM's (Mainly) Amateur Radio Blog

Looking through some old photos, I spotted this one from 2012 showing my beacon for 2200m (137kHz). As I recall it produced about 8W althoug...

Last night I tried some local 137kHz tests using my 137kHz beacon. Then it blew up!!  I could smell burning and the transmission stopped.  T...

On my ‘to do’ list are some QRSS tests at 137kHz using my earth-electrode ‘antenna’ in the ground and SpectrumView software on my iPhone.

Last night I gave the latest version of Google's AI tool (now called Gemini) a try. I tried various family names, without being impresse...

This was in 2013 at the old QTH.  At the time I was seeing how far away I could be spotted on that band. Not much later, I got to the Nether...

 Apart from an unsuccessful test last year with my CW beacon, I have not tried TX this LF band. As my only suitable antenna is my earth-elec...

It is a very long time since I was on this LF band.  On TX, I have used my earth-electrode "antenna" in the ground and a loop in t...

The photo shows the screen shot of my 137kHz experiments some years ago. I used the earth electrode antenna buried in snow with a small E-fi...

A few days ago I tried spotting on 137kHz WSPR. Nothing was copied.  I am wondering what modes are used mostly these days on this band?   P...

At the moment I am on 137kHz WSPR with the Wellgood active loop. It will stay on overnight. It would be a miracle if I copy anything! As usu...

  This photo, taken about 10 years ago, shows my 137kHz TX transverter. I still have it...... somewhere. See   https://sites.google.com/view...

Before my stroke, I did some mobile tests on 137kHz QRSS QRP using an EFP with an FT817 RX. The EFP was mounted on a mag mount.  Results tot...

At the old QTH I was active on 137kHz. The photo shows my 140uW ERP QRSS signal at 101km. With a "proper" antenna and decent power...

From this QTH I have never tried 137kHz. At some point I really should. It is an interesting allocation. From the old QTH I copied a statio...

Several years ago I made this mag-mounted 137kHz e-field probe to see how far away I could detect my QRPP 137kHz beacon. At about 24km I j...

Because of my poor health, it is some years since I have done any serious experimentation or building, so I hope some of the ideas on my m...

Last winter, I tried 137kHz WSPR and OPERA even though my FT817 is very deaf on LF. In the past, when I was fit, I put my 137kHz beacon ...

Many years ago, I tried looking for my tiny 137kHz beacon with a small E-field probe mag-mounted on the car. After seeing the signal quite...

One of my videos describes my transverter for 137kHz, a band on which I had no suitable antennas. Best DX was a WSPR spot by G8HUH at 25...

This winter, I went on 137kHz WSPR RX for the first time at this QTH. I used my earth-electrode antenna in the ground. Really, I ought to ...