Roger G3XBM's (Mainly) Amateur Radio Blog

For the first time in more than a week I ran the WSPR beacon through the night. Best DX reports were from GM4SLV , GM0UDL and Lubos OK2BVG ...

A new station has reported my 500kHz WSPR signal this evening: ON4BB in JO21 at 294kms. Later, GM0UDL spotted me from up in IO77 square a...

Mike Rainey AA1TJ has built his version of the XBM80-2, but LESS the audio stage, using instead his 600 ohm magnetic headphones via a trans...

This evening, I was WSPR decoded by a new station in the Netherlands PI4Z in JO11wm at 260kms. This brings the total number of stations who...

The Dutch magazine CQ-PA has quite a large article on 500kHz operation this month. I was very pleased to see my little IRF510 based transve...

Some recent research may have helped the dream of unlimited and pollution-free energy from nuclear fusion become a big step closer. Scienti...

See http://www.nist.gov/public_affairs/techbeat/tb2010_0126.htm#antenna "The National Institute of Standards and Technology (NIST) and...

EA3GHS and EA3FXF have produced a single IRF510 FET based version of his Mosquito transceiver using a PC as the back end of a software de...

Web software defined receivers (SDRs) are becoming quite common now. They allow you to eavesdrop on a number of different HF bands and tune...

Apple has finally revealed its new killer product - the iPad. My son has an iPhone and is very pleased with it. I doubt I will be persuaded ...