Homebrewed Yagi-Udas with NEC2C and “automatik”
NEC2C is a well-known software for calculating frequency-dependent radiation patterns and feedpoint impedances of antennas. The open source software “automatik“, which is a…
radioircd – experimental version of an APRS chat published
Just over two years ago, I wrote about a project idea in this blog. An open source APRS client for the command line…
hamspirit.de’s KiwiSDR with excellent Signal-Noise-Ratio
What seemed impossible just a few years ago is now reality: a global network of SDR receivers that allows to monitor the HF…
Using APRSdroid offline with OpenStreetMap
Today I want to explain how you can use APRSdroid with the maps of OpenStreetMap. The OSM maps have to be downloaded and…
A station clock with a NCDXF beacon indication
A precise station clock with indication in UTC is probably needed by every ham who’s active on the shortwave bands. And when it…
APRS via ISS – Tips for successful operation
Just over a year ago an article about my APRS experiments with the International Space Station appeared in the zeroth issue of the…
OpenWebRX on a Raspberry Pi
The Raspberry Pi has been able to mobilise masses of tinkerers and get them to realize their own project, just months after its…
