marxy's musing on technology

A wonderful feature of ham radio field days is the circulation of second hand radios. This means that you can buy an old radio, play with it...

Since starting to receive ADS-B signals on 1090MHz I was wondering how well my home made antenna was tuned to that frequency. I spotted an...

At last Sunday's ARNSW Home Brew group meeting, Peter, VK2EMU handed me a Raspberry Pi a USB audio dongle and my mission instructions......

I love tuning around HF with an SDR display, it's great to see the whole band in one go. The recent v0.1.20-alpha update to CubicSDR ...

It's raining this weekend in Sydney so it's a good time to tinker with things indoors. Thanks to Ross, VK1UN for the tip, I'm no...

This weekend some antenna work. I've put up an open wire fed " doublet " antenna for 40m and of course all bands up from that....

One of the intriguing things about the Fifi SDR is that as well as I/Q output via an in-built USB sound device it also has the ability to d...

The nicest way to tune around is with a software defined radio. Being able to see a wide area of a band and simply click on the active signa...

One of my colleagues, Jules, is totally hot. I think his desk is under an air conditioning vent or perhaps he just works too hard. Anyhow, i...

The Arduino IDE is a great way to get started with embedded programming. It combines an editor, library manager, board manager, examples, pr...

I've been playing with the interesting esp8266 which can be programmed with the Arduino IDE and has built in Wifi capability. Today I m...

My thanks to Ross, VK1UN, for the following instructions which allow the easy installation of WSJTX on a Raspberry Pi 3 (and earlier is no ...

This might surprise my radio friends, but by day I'm a software developer. We've just finished a new version of ABC iview (only avai...

We have a toaster and we have an oven, but we don't have a "toaster oven". Recently Phillipa has been producing a huge crop of...

This year was a perfect day for the annual Wyong field day. Rowetel had a table this year showing FreeDV and the SM1000 s were sellin...

The esp8266 is a tiny board that costs from about $5 and has a processor with Wifi capabilities. I bought a pack of the 1Mb upgraded version...