LA3ZA Radio and Electronics

Version 1 of my Multi Face GPS Clock is here, as open source software for the Arduino Mega. It has some 22  19 different display screens sh...

I’ve been working on a GPS-controlled Arduino clock for some years and had set myself the goal of showing time for moonrise and for moonset ...

There is a recommended sequence for multi-band transmission on WSPR. It is given in the K1JT WSPR documentation . If enough receivers follow...

I've had my APRS temperature station running since 2012 . It is based on a DS18S20 sensor that just sticks out of a window. However, aft...

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

I have tried several oscillators in the U3S QRSS/WSPR transmitter from QRPLabs. First an analog devices DDS, then a Silicon Labs oscillator ...

It is well known that the sunspots vary over an eleven-year cycle. As the sunspot number increases, the ionosphere is more ionized and radio...

Some years ago I described some AM transmitter experiments for the longwave band from 150 to 300 kHz. A transmitter that worked over a few ...