marxy's musing on technology

This week I'm a guest on Marc Fennell's ABC RN "Download This Show" . "We’ll soon be walking around with them and fla...

The uSDX is not a great receiver or transmitter but it is usable and amazingly small. I bought mine through AliExpress . "uSDR uSDX 10/...

There's some tribal knowledge around about Arduino IDE (and library) versions. I've heard from people that a certain version is the ...

Dallas, like many of us, doesn't have much scope for a decent HF antenna at home so he has perfected the art of putting up antennas in t...

This morning a friend said hello on Facebook messenger. The message said that we hadn't talked before - which was believable as we norma...

I'm keen not to burn out the input to the spectrum analyser. It's 50 ohms in with a maximum of +30dBm. The solution is to transmit i...

I've wanted to try a spectrum analyser for many years but they've been prohibitively expensive. Just as oscilloscopes have come down...

Wanting to play with a simple WSPR Beacon in the house where I can't receive GPS for time synchronisation, I've hacked together a be...