marxy's musing on technology

The Amateur Radio field day at Wyong this year seemed relatively quiet but had some very interesting gear on display. All sorts of old gea...

A few observations. There is some sort of bag collecting addiction at work here. It became clear when all bags were removed from cupboar...

Recently I started playing with LoRa modules for sending telemetry around. Last time I purchased a 433Mhz module and wired it up to an Ardu...

As you might have read, (particularly for international readers), the bush fires this summer in Australia are unprecedented. At the time o...

This morning on ABC Radio National, Geraldine Doogue's Saturday Extra featured a fascinating panel discussion about what became Radio Au...

There's a new version in the App Store that corrects the problem we've been having. I'm now working on improvements to the handl...

My free iOS app, WSPR Watch , is a convenient way to display data from WSPRnet.org and a few other ham radio sites. The app stopped worki...

80 years of international broadcasting by the ABC was celebrated this week at the headquarters in Ultimo, Sydney. David Hua, ABC Head, I...

I've always felt pretty safe from malware by running macOS but recently three people I know have found that they have unwanted software ...

Recently I purchased two ESP32-CAM modules from Banggood for under AU$10 each. There is lots of help on line including the excellent Random...

After reading a glowing review of the low cost MLA-30 active receive loop antenna, I ordered one from Aliexpress for just AU$55 . Here are ...

Thanks to talented friend  Aidan Roberts , I've just listened to a fascinating podcast series from the BBC World Service called "...

LoRa is a fascinating radio system for low power but long range digital data communications. Low cost transceivers claim a range of 15km. J...

The long awaited review of Australian Broadcasting Services in the Asia Pacific has been released and is available here . The 193 page...

This is a followup to an earlier post where I used an ESP8266 to connect to Wifi and call a JSON web service on my Fronius inverter to sho...

Low Earth Orbit (LEO) satellites are cheaper to launch than geostationary satellites and, with modern manufacturing, can be cheap enough to ...

There's a great documentary made in 2016 called " Zero Days " that I watched on the recommendation of a daughter. It investi...

Kevin, VK2KB, kindly invited me to stay on a friend's property near Goulburn, south of Sydney. On a hill near the homestead, Kevin had...