Roger G3XBM's (Mainly) Amateur Radio Blog

Elecraft's XG3 signal generator Although I have a couple of (loaned from friends) signal generators, these are rather large in a sma...

In recent years I've written articles on a wide range of subjects, from VLF to optical, for several different radio magazines around the...

I'm frustrated and actually quite annoyed with Royal Mail.  Have you visited the barely understandable Royal Mail website recently?  Al...

Chinese QRP kits and ready built radios seem to be everywhere. For example, see the KN-Q7A kit from http://www.crkits.com/ . This little 40...

There has been some excitement over the last few days as Lawrence KL1X has seen a signal on 8.9700kHz when the noise was low that just coul...

Since its early days, I've been receiving posts from the Yahoo KX3 Group , which is a group for people interested in this Elecraft radio...

In my early days as a shortwave listener, the various VOA transmitters around the world were popular station targets for reports. I even c...

Recently I read about some interesting work on Rectennas , which are combined antennas and rectifiers used to detect microwaves and optical ...

For the last few days we have been on holiday in Lincoln, staying at the Old Palace Hotel (I an highly recommend this) just below the marvel...

The schematics below are of the RX and TX used in the recent "over the horizon" NLOS 481THz optical tests. As you can see, not too...