Roger G3XBM's (Mainly) Amateur Radio Blog

At the end of April we seem to be seeing green shoots of recovery not only in the economy, but also in the sunspot count : today the sunspot...

For most of April I've been putting out CQs on 10m CW/SSB/FM and checking the DX cluster for signs of sporadic-E propagation into Europ...

The QRP community has a lot in common with Quakers (Society of Friends) , especially their ethos of living simply and fairly. If you have n...

Today is the anniversary of Samuel Morse's birthday. To mark it, Google has its usual banner in Morse rather than letters - a nice touc...

A very neat and simple MF TX called the E-QTX has appeared on the Google UK500khz group website. This design looks so straightforward that...

Already some replies on the quest for ultra-simple SDR transceiver ideas - thank you. For example see the LY1GP site http://www.qrz.lt/ly1...

A challenge - what is the simplest possible SDR transceiver that can be built that would allow credible results on HF QRP? Does anyone know ...

Received this today about SDR kits from Australia: Hi Roger - Here is a piece of information that may be of interest to your blog reade...

Has anyone reading this blog built the neat little GNAT-1 transceiver featured in SPRAT 138 (Spring 2009) by Chris Trask N7ZWY ? This looks...

Solar flux reaching the giddy heights of 71.0 and today there is 1 sunspot on the visible side of the sun. Things may be looking up after ...