Roger G3XBM's (Mainly) Amateur Radio Blog

Spectran screenshot of 481THz "treebounce" test 30.1.12 Last night I made my first recordings of my optical beacon in action. ...

Ondra OK1CDJ kindly sent me some photos of his version of my 10m chirpy transceiver. Currently he is getting around 50mW out, a little lo...

Today I completed my first keyed optical beacon transmitter (with 100mm optics) which I'll be using for tests at greater range than h...

Having made several short-wave crystal sets in my time I have nearly always used the little "deaf aid" very high impedance cryst...

When my grabber is running I use Dropbox to automatically upload the captured image to a location on the net where anyone can see the ima...

Today my new KID2 pre-programmed beacon ICs arrived from www.k1el.com . These are for use in my VLF, 136kHz, 500kHz and 481THz beacons. With...

Investing in a new laptop or netbook can be a tricky decision: getting the right price, spec, performance and reliability. My Dell laptop fa...

Last night I wrote to Yaesu UK about the FT-450D hum issue and got a very fast and very helpful, response from Paul Bigwood their Techni...

Having re-erected my 80m loop antenna I was about to reload OPERA and give it a try now it appears more stable. I ran up the transverter on ...

For many years I used a little Asus EEE PC701 (7 inch screen) netbook running a pre-loaded Linux OS. This was ideal for basic net surfing ...