marxy's musing on technology

With a little travel on the agenda soon, I thought I'd run up OpenWebRX on a Raspberry Pi 4 in the shack. The simplest approach is to d...

Several people have commented that the 10m (28MHz) band is very active at the moment. Compared to my 80m dipole, a little dipole for 10m was...

After the failure of my ESP32 web server to monitor battery voltage I reverted back to a simple system with an Arduino Nano reading analog v...

The radios in my shack are now powered by a 12V flooded deep cycle lead acid battery with 105Ah capacity charged from a 100W solar panel. So...

Timed to coincide with the release of iOS 17, WSPR Watch version 4 is now in the iOS App Store. It's a long overdue re-write of the app...

As part of my project to convert the shack to off-grid power I thought it might be good to replace the shack laptop (with its mains charger)...

During the beta phase of iOS 17 , which will be released in a day or two, I've been working on a re-write of my iOS app " WSPR Watc...

Visiting the emergency communications exercise a few weeks ago inspired me to make sure my radio shack can operate without mains power if r...

On Sunday I drove two hours to get to the Shepparton Hamfest . A little tiring but an excellent show that was both well attended and had lot...

It's 7C in the shack tonight so I decided to set up the IC-705 and use it remote from the warmth of the house. The client software on ma...

We have 6kW of solar panels here but it's important to know when the sun is shining on them so I can use that power to charge the car or...

It was a pleasure to assist at an event organised by ABC Friends - southern bayside . The topic being discussed was "The ABC Past, Pres...

After competing in GovHack in 2017 I became heavily involved as a volunteer for a few years. After a break and a move to Melbourne I volunt...

I'm on a bit of a retro transmitter trip at the moment. Armed with some low profile 3.6864 crystals I built the "Simplex Sidebander...

I was horrified when I looked at the spectrum coming from the minion on 80m so clearly a low pass filter is needed. I used the notes from GQ...

The QRPVer QRP Minion SDR transceiver I ordered on Feb 3, has just arrived (June 13). So far I'm very impressed. It's very compact,...

Here I describe how I've been able to use a SDRPlay RSP1 clone with CubicSDR via SoapySDR on Linux Mint (a Debian/Ubuntu derivative) wit...