marxy's musing on technology

Prototyping small circuits where it's not worth designing and etching a board can be done in many ways. I've used "ugly" (...

The home brew AM transmitter on the bench at the moment has thrown up the issue of either low or over modulation from my mic audio. Some tim...

For too many weeks I've been tinkering with a small transmitter for the active AM frequency of 7.125Mhz and just now I called CQ and was...

Ross, EX0AA, is working to do WSPR on very low frequencies and asked for some help generating WSPR tones as audio directly. There are severa...

Thanks to Lindsay, VK3GX, for bringing this wonderful BBC program to my attention. The team shows the development of radio and makes various...

How do you remember your passwords? Making up and remembering unique, complex passwords is a struggle for many of us. Those days are ending....

The Radio Old Timers Club annual general meeting and lunch was well attended by members of MRARC . Peter VK3RV, Jen VK3WQ, Ray VK3ACR and Pe...

Australian QRP and home brew enthusiasts typically subscribe to two fine newsletters, the local Lo-Key from the VKQRP club and the British...

I appeared on ABC radio last night discussing the tech news with Philip Clark. "Google's new "pixel 9" phones were reveal...

There is a very active AM net here on 7.125Mhz and quite a few of the stations come up with home brew transmitters. (There's also a few ...

ABC Radio legend and beloved presenter of ABC TV's BackChat program, Tim Bowden has died. He was a wonderful broadcaster, producer, writ...

Looking at digital modes for talking with people with high local receive noise I noticed Contestia in Fldigi. It's derived from Olivia b...

Regular readers will know that I'm one of those commentators you hear on the radio. I've always been keen to have my audio sound as ...

A new ID system for Australians. At a speech at the National Press Club today, Government Services Minister Bill Shorten announced the trial...

The house here has 6KW of solar power, when the sun is shining and hitting the panels. I like to watch what's being generated so I can u...

It's been many years since I've built a quadcopter from parts. What triggered this project was stumbling across the SpeedyBee fligh...

This year I fulfilled a long term ambition of visiting Uluru in the centre of Australia and I couldn’t help thinking how spots from there mi...

Billboards are said to be one kind of advertising that can't be blocked or skipped. That's all about to change with a revolution in ...

A recent podcast from Freakonomics titled  Why do your Eyeglasses cost $1,000? explains the EssilorLuxottica monopoly we face here in Aust...

This week on ABC Radio Nightlife, we talked about Samsung's product updates and how much they look like Apple products, a new way to mig...