LA3ZA Radio and Electronics

I happened to set my 2m receiver to the APRS (Automatic Packet Reporting System) frequency of the International Space Station (ISS), 145.825...

I got my AP510 APRS tracker a little more than a year ago . It kind of worked, but not very well in my car. But after the tracker got a ...

I just ordered an AP510/AVRT5 APRS tracker and am anxious to get my hands on it to try it out. I like the small size and the fact that it ...

Norway has had its fair share of precipitation this winter. Along the coast most of it has been in the form of rain. But that is different...

The audio in particular should make it clear how busy the frequencies around 433.92 MHz are: Data recorded from an RTL-SDR USB...

Yesterday's post entitled "Car keys in the 70 cm band" showed a very busy band around 433.92 MHz with up to 10 simultaneous tr...

The 70 cm amateur band covers from 432 to 438 MHz  in Norway  and radio amateurs have primary status. Secondary users are among others remo...

How do the cheap Baofeng handhelds compare? I have had the Baofeng UV-5R since I bought it from the  409shop  in April 2012, but recently ...

When you measure the energy out of a GSM cell phone at the moment of initiating a call, you get the picture to the right. It shows the fir...

My APRS -based temperature monitor has now worked flawlessly for half a year. APRS stands for Automatic Packet Reporting System so it can se...

A stop-over on my way from Sydney to Oslo gave me the opportunity today to visit Apliu street  in Hong Kong. This is where all the electro...

Press image for magnification I like to build small electronics projects and like many others I have found the small Altoids tins to be...

Several fellow hams in the Asker and Bærum district have converted Mobira (Nokia) MD50 or MD59 Talkman NMT-450 phones from 1985-1988 to the ...